ACTA PHYSICO-CHIMICA SINICA
·
2026
·
IF 13.5
Jialei Dong,Jixing Bai,Liu Yang,Haiyan Zhang,Junbo Qi,Saina Zheng,Yue Wang,Huiyan Zhang,Qi Cao
Layer engineering is widely applied in two-dimensional materials to achieve tunable and optimal properties. Graphene oxide (GO) nanosheets, as carbon-based carriers, offer various advantages for electromagnetic wave (EMW) absorption, including high specific surface area, tunable conductivity, and abundant polar functional groups. Nevertheless, the regulation of layer numbers of GO-based composite absorbents, and comprehensive understanding of the underlying mechanisms influencing the EMW absorption properties remain insufficient. This study converts ZIF-67/GO into Co/rGO composites, and employs the layer engineering via ultrasonic-assisted calcination, to investigate the influences of GO layer numbers on the material’s EMW absorption performance. In the optimized Co/rGO, few-layer GO forms a better conductive network, while the well-dispersed Co nanoparticles introduce magnetic loss and assist in achieving impedance matching. As a result, this sample delivers considerable absorption performance, with a minimum reflection loss of −49.86 dB and an effective absorption bandwidth of 5.35 GHz. Following additional heteroatom doping, the Co/rGO composite could further achieve an absorption efficiency of above 99.9999% (−68.02 dB), which efficiently reduce EMW signals from highly reflective targets to background noise level. This study confirms the effectiveness of layer engineering in regulating electromagnetic properties and thereby enhance the absorption performance of carbon-based composites to achieve strong and broadband EMW absorption. Through layer engineering and doping treatment, Co/rGO composites achieve strong and broadband EMW absorption performance. This study comprehensively reveal the correlations between microstructure and electromagnetic properties of 2D Co/rGO composites. Download: Download high-res image (201KB) Download: Download full-size image
✓ 已验证
产品关联
DOI
高影响因子
VACUUM
·
2026
·
IF 4.3
Zhongping Dong,Kangting Sun,Heyou Yang,Shuyan Xiao
Magnéli phase Ti 6 O 11 ceramics were prepared by the solid-state reduction of TiO 2 with graphite. By adding zinc oxide during processing, dual energy-filtering systems comprising defect clusters and carbon layers were formed in the ceramics. The power factor showed a significant increase with the addition of zinc oxide during preparation. At 973 K, the sample with x = 0.03 exhibited a power factor of 380 μWm −1 K −2 , representing a 15% enhancement compared to the sample prepared without it. When sintered at 1400°C, the ceramic sample underwent gradual zinc volatilization, promoting the formation of defect cluster structures and carbon layers that filtered out low-energy electrons and consequently increased the absolute value of the Seebeck coefficient. Additionally, the zinc oxide acted as a fluxing agent, increasing the ceramic density by 4.5%, and the carrier mobility at 323 K was improved by 16%. The synergistic effect of the dual energy filtering mechanism and densification played important roles in the overall optimization of electrical transport performance in the materials. Finally, at 973 K, the sample with x = 0.03 achieved a thermoelectric figure of merit of 0.14, which was 12% higher than that of the sample without added zinc oxide.
✓ 已验证
产品关联
DOI
高影响因子
RARE METALS
·
2026
·Vol. 45
·期 8
·e70481
·
IF 12.1
Long Jiang,Zhuang Wu,Qi Fan,Shengchao Wang,Wenjie Zhang,Lijing Yu,Dirong Gong,Yunlei Zhou,Kun Liang
en This link goes to a English section zh This link goes to a Chinese section Lithium–sulfur batteries have attracted extensive interest owing to their exceptionally high theoretical energy density and environmental benignity. However, their practical performance remains severely constrained by intrinsic challenges, including the polysulfide shuttle effect and large volume expansion during cycling, which markedly compromise energy efficiency and fall far short of the requirements for commercialization. To address these challenges, we modify a commercial separator (PP) with a dual-transition-metal Mo 2 Nb 2 C 3 MXene, whose surface terminations are precisely regulated via distinct etching strategies, thereby substantially enhancing the electrochemical performance of lithium–sulfur batteries. Compared with cells employing the pristine commercial separator, all PP@Mo 2 Nb 2 C 3 -based cells deliver superior rate performance at a high current density of 3C. Notably, the PP@Mo 2 Nb 2 C 3 -Cl cell retains a high discharge capacity of 589 mAh g −1 after 200 cycles, nearly doubling that of the cell with the commercial PP separator (307 mAh g −1 ). At all tested C-rates, the PP@Mo 2 Nb 2 C 3 -based cells delivered higher discharge capacities than those employing the commercial PP separator. Overall, modification of Celgard 2500 with the dual-transition-metal Mo 2 Nb 2 C 3 MXene effectively suppresses the polysulfide shuttle, enhances sulfur utilization, and substantially prolongs the cycle life of lithium–sulfur batteries. This work provides valuable insights into the rational design and application of MXenes as functional modifiers for advanced lithium–sulfur batteries. 摘要 en This link goes to a English section zh This link goes to a Chinese section 锂硫电池因其高理论能量密度和对环境友好受到广泛关注,但其在工作中产生多硫化物引起的穿梭效应、体积膨胀等问题严重影响电池的效率,远不足以达到商业化的要求。针对这些问题,本文研究了双过渡金属Mo 2 Nb 2 C 3 MXene对商用Celgard 2500进行改性,通过不同的刻蚀方法调控Mo 2 Nb 2 C 3 MXene端基,进而有效提升了锂硫电池的性能。与商用Celgard 2500隔膜相比,所有基于PP@Mo 2 Nb 2 C 3 的电池在3C倍率下均表现出更优异的倍率性能。值得注意的是,PP@Mo 2 Nb 2 C 3 -Cl电池在200次循环后仍保持589 mAh g −1 的高放电比容量,几乎是使用商用Celgard 2500隔膜电池(307 mAh g −1 )的两倍。在不同倍率下,PP@Mo 2 Nb 2 C 3 电池均表现出比使用商用Celgard 2500隔膜电池更高的放电比容量。总体而言,采用双过渡金属Mo 2 Nb 2 C 3 MXene对Celgard 2500隔膜进行改性,能够有效抑制多硫化物穿梭,提高硫利用率,并延长锂硫电池的循环寿命。这项工作为合理设计和应用MXene作为先进锂硫电池的功能改性材料提供了有价值的见解。
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Ranran Cao,Mantang Chen,Yipeng Wang,Xuehui Sun,Xiaoyu Wang,Peijian Sun,Cong Nie,Yang Xu
A facile one-step ball milling strategy was developed for direct synthesis of functionalized carbon adsorbents from natural flake graphite. The obtained ball-milled carbon materials (FG-BM) were systematically characterized and evaluated for their enhanced toluene removal performance. The obtained FG-BM exhibited a transformed morphology from stacked layers to micron-sized spherical particles with hierarchical porosity, a dramatically increased specific surface area, and abundant nitrogen/oxygen functional groups. These structural and chemical modifications significantly enhanced toluene removal performance, achieving 99.75% efficiency compared to 67% for pristine FG, with complete mineralization of toluene into non-toxic CO 2 rather than CO. Systematic optimization revealed that milling parameters, including particularly ball size, rotational speed, and cycle number, critically influenced performance, with 15 mm balls, 700 rpm, and 8 cycles delivering optimal results. The strategy demonstrated high generality, notably improving toluene removal efficiency for three commercial carbon adsorbents from 25 to 35% to 90.6–99.8%. Mechanistic studies identified pyridinic-N and oxygen-containing groups (C O, O-C=O) as key active sites, facilitating toluene adsorption and catalytic oxidation via intermediates such as benzaldehyde and benzoic acid. This work provides a scalable, solvent-free route to high-performance functionalized carbon adsorbents for efficient toluene removal.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED THERMAL ENGINEERING
·
2026
·
IF 7.5
Yanfu Feng,Wenchao Chen,Wen Zhang,Xiangpeng Geng,Qing Gong,Dekai Guan,Yaxin Liu,Xiaoguang Zhang,Xin Min,Bin Ma
Based on the confined flow - dual-network fixation mechanism, a self-adaptive composite phase change material was prepared. • In the chip thermal management, this composite phase change material could reduce the CPU temperature by up to 31.25 °C. • The composite phase change material has self-adaptive capability, reducing the interface thermal resistance by up to 78.56%. With the continuous trend toward high integration, chips are increasingly subjected to high heat-flux densities. However, excessive heat-flux density can induce chip overheating and warpage, increase local interfacial thermal resistance, and ultimately raise the risks of heat-dissipation failure and performance degradation. Therefore, thermal management has become a critical bottleneck restricting the further development of advanced chips, whereas conventional thermal interface materials (TIMs) still struggle to simultaneously accommodate chip warpage and maintain structural stability. To address this challenge, this study proposes a self-adaptive thermal-interface strategy based on a confined-flow and dual-network fixation mechanism. By constructing a calcium chloride tetrahydrate (CaCl 2 ·4H 2 O)/expanded graphite (EG)/in situ-grown silicon carbide nanowire (SiCnws) system, a high-efficiency heat-dissipating composite phase change material (CPCM) was developed, enabling simultaneous warpage conformability and structural stability. When applied to central processing unit (CPU) thermal management, the CPCM achieved a maximum core-temperature reduction of 31.25 °C. After 300 thermal cycles, the maximum fluctuation in the CPU core temperature was only 10.9 °C. Characterization results showed that, upon heating, the CPCM softened and conformed tightly to curved copper sheets, thereby reducing local thermal resistance. Interfacial thermal resistance measurements indicated that the adapted interface exhibited a resistance of 0.215 cm 2 ·K·W −1 , corresponding to a 78.56% reduction relative to the non-adapted state. This study provides a promising technical pathway and theoretical guidance for addressing chip warpage and high-heat-flux dissipation challenges.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2026
·
IF 8.4
Li He,Jiao Peng,Juan Yang,Zheng Xie,Kangjie Zhou,Wang Qiu,Hong Liu,Xianyou Wang
With the rapid development of the photovoltaic and solar cell industry, the growing generation of crystalline silicon sawing/cutting waste has become an urgent problem. However, silicon (Si) is considered a promising alternative to graphite for next-generation high-energy density Li-ion batteries owing to its much higher theoretical capacity. Herein, photovoltaic silicon sawing/cutting waste is recycled as high-performance silicon/carbon anode active material of lithium-ion battery through an integrated strategy combining mechanical activation, acid leaching, dopamine self-assembly coating, and graphite buffering. The as-prepared silicon/carbon composite features a hierarchical architecture, which is composed of nanometer-sized Si particles covered with amorphous carbon and uniformly anchored in a conductive carbon matrix, effectively mitigating the severe volume fluctuation during charge/discharge. Enabled by the enhanced structural stability and interfacial compatibility, the activated silicon/carbon anode delivers a high reversible capacity of 641 mAh g −1 after 350 cycles at 0.5 A g −1 , with a capacity retention of 98.1%. Therefore, the investigation introduces an innovative method for recycling and enhancing the value of photovoltaic silicon sawing/cutting waste for further use, offering a sustainable and economically viable solution.
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2026
·
IF 18.1
Li Zeheng,Wu Zhuoying,Qian Shangshu,Lv Xucheng,Dai Chengjun,Lin Zheng,Zheng Mengting,Liu Tiefeng,Song Ting-Lu,Lin Zhan,Lu Jun
The pursuit of high-energy-density lithium-ion batteries demands high-silicon silicon-graphite composite negative electrodes, yet their commercialization remains hindered by interfacial incompatibility and mechanical instability. While an ideal binder must simultaneously achieve robust adhesion to both silicon and graphite, accommodate substantial silicon volume changes, and maintain high binder bulk stability, existing systems fail to harmonize these requirements. Here, we present a molecularly engineered binder that resolves this trilemma through interfacial-mechanical synergy. By integrating a hydrophobic-soft copolymer and hydrophilic-hard copolymer, our design enables amphiphilic interfacial adhesion and provides mechanical properties specifically tailored to accommodate silicon volume changes. A supramolecular crosslinker further reinforces interchain cohesion, ensuring binder bulk stability during long cycling life. This design enables a 2 Ah-level pouch cell to sustain 500 cycles at 0.3 C with 99.83% average Coulombic efficiency. At a commercial binder loading of 5 wt%, 1 Ah cells deliver over 2000 cycles at 1 C with an average Coulombic efficiency of 99.93%. Our work has the potential to not only resolve the long-standing trade-off between interfacial and mechanical stability in silicon-based negative electrodes but also provide a practical framework for designing next-generation binders targeting energy-dense, durable batteries.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2026
·
IF 3.6
Laiquan Lv,Yajie Wu,Hao Zhou
Lithium-ion battery thermal management materials are required not only to provide efficient heat dissipation and latent heat buffering, but also to maintain reliable electrical insulation under practical operating conditions. In this work, a series of high-resistance composite phase change materials (HPCMs) were developed using tetradecanol (TD) as the phase change matrix, SEBS as the supporting framework, and BN, BC, SiC, and EG as functional fillers via melt-blending. The relationships among composition, microstructure, thermophysical properties, thermal stability, and electrical insulation were systematically investigated. The results show that filler type and network structure strongly influence the overall performance of the composites. With only 5 wt% EG, HPCM-4 achieved a thermal conductivity of 1.5402 W/(m K), which was about 350% higher than that of pure TD, while all HPCMs maintained excellent electrical insulation with conductivity values generally below 10 −8 S/cm. HPCM-6 exhibited the highest latent heat efficiency of 60.35%, indicating that the crystallization behavior of TD is highly dependent on the confinement effect imposed by the supporting framework and fillers. Battery thermal management tests further demonstrated that HPCM-4 effectively suppressed temperature rise and improved temperature uniformity. At 30°C, the average surface temperature of the battery was reduced to 41.72°C and 44.00°C under 1C and 2C discharge conditions, respectively, while the maximum temperature difference was maintained below 3°C. These results confirm that rationally designed insulating composite PCMs can simultaneously provide efficient thermal regulation and intrinsic electrical safety, offering a feasible strategy for advanced battery thermal management applications. Highlights HPCM combines high thermal conductivity, latent heat and electrical insulation. BN, BC, SiC, and EG exhibit distinct effects on thermal and electrical properties. HPCM-4 achieves 1.54 W/(m K) thermal conductivity while remaining insulating. HPCM suppresses battery temperature rise and improves temperature uniformity. HPCM-4 reduces T max to 41.72°C/44.00°C and Δ T to 1.32°C/2.26°C at 1C/2C.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Yuting Wang,Jianjun Cai,Xingying Tang,Yumeng Wu,Jiafeng Zhang
A novel steam‑calcium‑carbon source ternary synergistic reduction system was constructed for selective lithium extraction from spent NCM cathode materials. Under the optimized conditions (800 °C, 90 min, 15% C, 20% CaO, 0.3 mL/min water flow), the lithium leaching efficiency reached an ultrahigh level of 96.90%. • The dual function of CaO was clarified: immobilizing fluorine to prevent LiF formation and lithium loss, and fixing CO 2 to regulate reaction atmosphere and reduce carbon emissions; steam in-situ generated H 2 /CO via water-gas shift reaction as high-efficiency reducing agents. • This process replaced traditional acid-base reagents with water vapor, avoided toxic and hazardous substance introduction, and enabled recovery of gaseous products (H 2 /CO), achieving green and sustainable lithium recovery with low pollutant and greenhouse gas emissions. Lithium-ion batteries (LIBs) contain precious metals such as lithium, cobalt, and nickel, making their recycling crucial for resource conservation and environmental protection. However, existing recycling technologies typically rely on acidic or alkaline reagents, presenting issues such as high energy consumption and severe pollution. Conventional carbon thermal reduction or catalyst-based recovery technologies exhibit drawbacks such as harsh reaction conditions, poor selectivity, and limited lithium extraction efficiency, often resulting in fluoride pollution and substantial carbon emissions. This paper proposes a novel steam-assisted calcium-based calcination-reduction process, establishing a ternary synergistic reduction system involving a steam‑calcium‑carbon source to achieve highly efficient and selective extraction of lithium from spent ternary lithium battery cathode materials (SNCM). After optimizing key parameters, the optimal conditions were determined as follows: calcination temperature of 800 °C, duration of 90 min, carbon addition of 15%, CaO addition of 20%, and water flow rate of 0.3 mL/min. Under these conditions, the lithium leaching rate reached 96.90%. Combining multiple characterization techniques and thermodynamic calculations, the reaction mechanism was revealed: Water vapor generates H 2 and CO in situ via the water-gas shift reaction to serve as reducing agents. These agents synergistically decompose SNCM with carbon, converting lithium into water-soluble Li 2 CO 3 , reducing nickel and cobalt to metallic states, and transforming manganese into MnO. CaO sequesters fluorine to prevent lithium loss and traps CO 2 to reduce carbon emissions, ensuring selective lithium recovery. This process replaces traditional acid-base reagents with steam, eliminating the introduction of toxic or hazardous substances. The gaseous products are recoverable, reducing pollutant and greenhouse gas emissions. It provides a viable technical route for the efficient and environmentally friendly extraction of lithium from spent lithium-ion battery cathode materials.
✓ 已验证
产品关联
DOI
高影响因子
NANO
·
2026
·
IF 1.3
Kai Su,Hengyuan Liu,Zhengxin Li,Wenfeng Li
TiC nanoparticles were controllably synthesized via a molten salt method, employing Ti powder as the titanium source and high-crystallinity graphite and biomass-derived coconut shell carbon as the carbon source. The influences of the carbon source on the phase evolution, microstructure and oxidation of the products were elucidated using XRD, SEM, EDS and thermogravimetric analysis. The results indicate that coconut shell charcoal exhibits superior reaction kinetics, attributed to the high reactivity of amorphous carbon and the high specific surface area of the porous structure. TiC nucleation initiates as low as 700 ∘ C, and high-purity TiC nanoparticles are obtained at 900 ∘ C, exhibiting a distinctive coral-like wrinkled morphology derived from the biomass template effect. In contrast, the low reactivity of graphite requires a higher temperature to achieve TiC conversion. Coconut shell charcoal-derived TiC displays remarkably higher oxidation onset and peak temperature compared to graphite-derived TiC powder. This study elucidates the influence of carbon source on the structure and oxidation of TiC, providing a technical pathway for fabricating TiC-based functional materials with controllable morphology and superior comprehensive performance.
✓ 已验证
产品关联
DOI
高影响因子
TRIBOLOGY INTERNATIONAL
·
2026
·
IF 7.6
Mingyue Wang,Xiaohua Jia,Shanqisong Huang,Yujiang Fan,Jin Yang,Haojie Song
Conventional protective coatings and superlubrication technologies are often constrained by harsh environments, limited operating windows, and poor lubricant compatibility, making long-term reliability under complex service conditions difficult to achieve. Inspired by the multiscale textured structure of snake scales, this study proposes a morphology-coordinated magnetic guidance strategy to fabricate a biomimetic protective coating with a highly ordered three-dimensional network. Spherical Fe 3 O 4 nanoparticles were anchored onto graphene nanosheets, while ionic liquids intercalated between graphene layers formed coordination bonds with Fe ions, enabling strong interfacial coupling among the three components. Under an external magnetic field, the magnetized graphene was directionally aligned within an epoxy resin matrix. Tribological results show that the resulting DMGr-ILs-EP coating exhibits excellent self-lubricating behavior with a low coefficient of friction (COF) of 0.079, and achieves a superlubrication state under oil lubrication with an ultralow COF of 0.0016. Moreover, metal cations released from Fe 3 O 4 promote the formation of a protective passivation layer, while the aligned graphene structure significantly extends the diffusion pathways of corrosive species. Consequently, the coating maintains high corrosion resistance after 300 h of neutral salt spray exposure. This morphology-synergistic design provides a promising strategy for integrated wear- and corrosion-resistant coatings in harsh service environments.
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2026
·
IF 9.9
Xing He,Yi Gong,Weiyi He,Bo Su,Guifang Wang,Chengshui Chen
Based on the shape memory polymer (SMP), we create an antibacterial strategy of ‘Shape-Wetting-Release’ Mechanism with drug release kinetics to address the high risk of post-operative infection inherent to airway implants. • Graphene oxide (GO) is purposed for the first time as multifunctional enhancements to SMP, including improvements in mechanical properties, hydrophilicity, shape recovery performance and antibacterial drug delivery platform specifically for SMP tracheal stents. Electrospun shape-memory polymer (SMP) membranes were engineered from polylactic acid/polycaprolactone (PLA/PCL) reinforced with graphene oxide (GO) for potential antibacterial tracheal stent applications. This research integrated shape memory behavior with drug release kinetics to achieve on-demand antibacterial response, specifically tailored for the infection-susceptible tracheal microenvironment. GO served as both a reinforcing nanofiller and a carrier for vancomycin (VAN) and silver nanoparticles (AgNPs). The effects of GO content (0.1, 0.5, and 1 wt%) on fiber morphology, mechanical properties, thermal behavior, hydrophilicity, and shape-memory performance were systematically investigated. The results indicated that the incorporation of 0.1 wt% GO yielded optimal mechanical reinforcement and shape recovery efficiency (100% fixity/recovery ratio, recovery time ∼8 s). Notably, the shape memory effect (SME) actively enhanced membrane hydrophilicity with a decreased contact angle from ∼127° to ∼87° and facilitated a more rapid release of VAN. The drug-loaded membranes exhibited sustained release profiles and potent antibacterial activity against Staphylococcus aureus and Streptococcus pneumoniae . Biocompatibility tests confirmed the enhanced adhesion and viability of rat tracheal epithelial cells on GO-reinforced membranes, with Ag@GO showing better cytocompatibility to VAN@GO. This work demonstrated an antibacterial strategy for advanced tracheal stents. Download: Download high-res image (321KB) Download: Download full-size image
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）