FUEL
·
2025
·
IF 7.5
Qinghui Yan,Min Wu,Huafeng Zhou,Haoshen Huang,Zhengfei Chen,Haiyong He,Zixuan Liu
Lithium-air batteries (LABs) are highly attractive for their highest energy density among all energy storage systems, but the high reactivity and volumetric variation of lithium metal anode (LMA), as well as the inter-electrode crosstalk (shuttling) by soluble species, e.g. redox mediators (RMs), impose arduous challenges for their practicality. Traditional countermeasures such as LMA protecting structures and solid-state electrolytes (SSEs) increase heft, complexity and cost, diminishing LAB’s core advantage—the ultrahigh energy density. In this work, a high-capacity (1750 mAh g -1 SCC ) silicon-carbon composite (SCC) material was synthesized and used as the anode in a Li-ion air battery, exhibiting superior cyclability (86 cycles under 300 mAh g -1 carbon ) compared to that with LMA (61 cycles), and physical characterizations revealed no deposition of RM on the SCC anode despite the absence of SSEs to prevent shuttling, demonstrating their excellent compatibility. This work showcases the prospects of silicon-based anodes to address LABs’ anode stability issue and improve cell cyclability while retaining most of the energy density.
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高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Xiaomei Chen,Yuefeng Wu,Yanpeng Wang,Zezhong Li,Yusheng Luo,Yongcheng Jin,Xiaolin Che,Wei Liu
Silicon anodes hold great promise for high-energy lithium-ion batteries but suffer from severe volume expansion and unstable solid electrolyte interphase (SEI) formation. To address these challenges, this study develops a thermally crosslinked dual-polymer (KH550/sodium alginate) coating strategy. The 350 °C-pyrolyzed coating forms a semi-carbonized artificial SEI on the surface of Si particles that effectively suppresses side reactions and accommodates volume changes. Comparing with uncarbonized polymer coating, the denser semi-carbonized one demonstrates its unique effect in matching Li⁺ diffusion kinetics between the interface and bulk silicon, retaining the structural integrity of Si particles during lithiation. The resulting Si anode exhibits minimal volume expansion (8%), 82.5% initial Coulombic efficiency, 948 mAh g⁻¹ after 500 cycles at 2 A g⁻¹, thereby developing a new gate on enhancing electrochemical performance by pre-constructing semi-carbonized polymer coating around Si particles.
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高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Susu Chen,Mengjun Li,Liyang Lin,Zhen Wei,Ning Hu
Silicon's potential as a lithium-ion battery anode material is greatly constrained by its pronounced volume changes during cycling and inherently poor electrical conductivity. Although strategies like nanosizing silicon particles and applying carbon coatings offer partial improvements, fundamental issues including particle agglomeration and structural degradation during operation remain unresolved. In this study, leveraging the synergistic interplay between gelatin (GE) and sodium alginate (SA), we engineered a nitrogen-doped Si@rGO@GS via a seamlessly integrated route of liquid-phase synthesis, electrostatic self-assembly, freeze-drying, and thermal annealing. Silicon nanoparticles (Si NPs) were uniformly embedded within a hierarchically porous, three-dimensional nitrogen-doped carbon framework. The Si@rGO@GS composite electrode demonstrated superior electrochemical performance: achieving a maximum specific capacity of 1851 mAh g −1 at 0.1 A g −1 and maintaining 423 mAh g −1 even at a high current density of 2 A g −1 . Additionally, after 100 cycles at 1 A g −1 , the composite retained a reversible capacity of 548 mAh g −1 with an impressive capacity retention rate of 78.8 %. The cooperative interaction between rGO and biomass-derived carbon suppressed particle agglomeration and stabilized the carbon‑silicon interface, positioning the composite as a highly promising anode for lithium-ion batteries.
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高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Chengjia Dan,Yue Wang,Daikuan Huang,Yang Cao,Dabin Zhang
Leakages of electrolytic manganese slag (EMS) disposal sites pose a significant threat to soil and groundwater, necessitating effective in situ remediation technologies. This study presents a multi-scale analysis to elucidate the enhanced impermeability mechanism of EMS composite modified by sodium polyacrylate (PAAS). By integrating macroscopic performance testing (compressive strength, permeability, corrosion resistance, and pollutant leaching), molecular dynamics (MD) simulations, and advanced spectroscopic/microscopic techniques (FTIR, XPS, and EDS mapping), we establish a direct link between macroscopic properties and underlying molecular-level interactions. Results demonstrate that an optimal PAAS/EMS mass ratio of 0.2 significantly enhances compressive strength (12.3-fold increase), reaching 2.78 MPa, and reduces the permeability coefficient to 1.318 × 10 −8 cm/s, with leachate concentrations meeting relevant water quality standards. This performance improvement stems from a synergistic multi-scale effect: macroscopically, well-dispersed PAAS forms a crosslinked network, filling structural defects within the EMR matrix and encapsulating the CaSO 4 ·2 H 2 O hard phase; at the molecular level, MD simulations reveal that PAAS chains undergo ion exchange (Na + with Mn 2+ ) and chelation (between -COO - and Mn 2+ ), forming a multi-crosslinked polymer network that densifies the microstructure and effectively impedes contaminant migration. FTIR and XPS analyses corroborate these molecular interactions, confirming that the enhanced impermeability arises from the synergistic effects of polymerization, ion exchange, and chelation. This study provides a new approach for controlling environmental risks associated with EMS, demonstrating the efficacy of multi-scale analysis in optimizing material performance.
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高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Wenhui Geng,Xinmeng Hu,Yinhang Zhang,Xinze Li,Qinhua Zhou,Kuikui Xiao,Dong Cai,Shuo Yang,Huagui Nie,Haolin Wang,Zhi Yang
Polyacrylic acid (PAA) based-binders equipped with various functions are paramount importance in suppressing the expansion of silicon (Si)-based anodes. However, PAA molecules tend to slip from the surface of active materials during the expansion of Si-based anode due to their 1D linear structure. In this study, inspired by the strong adhesion mechanism of multiple antennae of Parthenocissus, a new polymer binder based on boronic acid (BA) and dopamine-modified PAA with fast self-healing, strong adhesion and stable mechanical performances is synthesized. Due to the abundant dynamic hydrogen bonds , the binder exhibit fast self-healing function at room temperature , thus guaranteeing the superior cycle stability of the electrode. These dynamic hydrogen bond sites not only endow the binder with strong adhesion but also contribute to an average peeling force of 1.50 N for Si@PDB, significantly higher than that of Si@PAA (0.79 N) and Si@PAB (1.29 N). Consequently, the Si anodes utilizing the rationally designed binder demonstrate excellent cycling stabilities (2538 mAh g −1 after 200 cycles) and rate performances (1973 mAh g −1 at 8.0 A g −1 ). These results suggest that the biomimetic binder can serve as a promising and effective candidate for Si-based anodes towards high-performance lithium-ion batteries.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Zican Zhang,Xiaoying Sun,Jiaqi Wang,Guorong Chen,Liyi Shi
Poly(acrylic acid) (PAA) has been widely studied as a silicon (Si) negative electrode binder, however, its poor adhesion and insufficient ion conductivity have always constrained its practical application in lithium-ion batteries (LIBs). A multifunctional binder was created by the lithiophilic poly(hexaazatrinaphthalene) (PHATN) enhancing PAA via forming physical and chemical crosslinking network (PAA-PHATN), addressing the widespread challenges of active material detachment caused by the irreversible volume expansion and impedance increase caused by low ionic conductivity in Si anode. The -C=N- and -NH 2 groups in PHATN interacted with the carboxyl groups in PAA through hydrogen bonding and amide formation, respectively, resulting in exceptional tensile strength (>2.3 MPa), remarkable ductility (up to 490 % strain tolerance), and high Li + conductivity. When applied in silicon electrodes, PAA-PHATN binders effectively mitigate Si particle pulverization during lithiation, accelerate Li + diffusion (with a diffusion coefficient of D Li + ≈ 2.43 × 10 −9 cm 2 s −1 ), and promote the formation of an inorganic-rich solid-electrolyte interphase (SEI) dominated by LiF. Consequently, the PAA-PHATN-based silicon anode delivers outstanding stability (1587.6 mAh g −1 after 500 cycles at 0.5 A g −1 ) and rate capability (1074.1 mAh g −1 at 5 A g −1 ), outperforming conventional PAA binders. This work highlights an effective strategy of binder design in balancing mechanical strength, adhesion, ion conductivity, and SEI components for Si based anode.
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PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Ali Hammad,Siyi Zou,Fandi Ning,Bin Tian,Wei Li,Xiong Dan,Xi Cheng,Xiaochun Zhou
Hydrogen production from silicon (Si) hydrolysis is environmentally friendly, safe, portable, and promising. However, the self-protected oxide layer around Si and a sluggish hydrolysis rate impede its practical utilization. To address this problem, we introduced sodium hydride (NaH) to form the core–shell structure of NaH/Si composites via a straightforward one-step, hand-mixing method in an ambient environment. NaH-based Si-M composites exhibit 83% hydrogen yield and a 52.7 mL/min hydrogen generation rate at 1–0.7 molar ratios. The hydrolytic activity includes the breakdown of NaH and the continuous hydrolysis of Si. X-ray diffraction, scanning electron microscopy, nanoindentation, and reaction observation studies have verified that NaH is pivotal in promoting thorough Si hydrolysis and attaining the maximum achievable yield compared to calcium hydride (CaH2). NaH/Si composites showed excellent hydrogen generation performance compared to CaH2/Si composites with microstructure silicon Si-S ≈ 1–3 μm, Si-M ≈ 75 μm, and Si-L ≈ 75–425 μm. Our study provided an innovative design and idea for utilizing cost-effective and easily transportable hydrogen production materials for practical applications, which has the potential for further advancement.
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高影响因子
RARE METALS
·
2025
·
IF 11
Liu Lang,Zhang Qian,Han Guangrui,Zhang Mengjie,Song Xinyu,Xiao Hong,Hou Linrui,Jiang Ruiyu,Yuan Changzhou
Si, as the most promising anode with high theoretical capacity for next-generation lithium-ion batteries (LIBs), is hampered in commercial application by its poor electrical conductivity and significant volume expansion. Herein, the core-shell Si@SiO x /C@C-Ar (SSC-A) or Si@SiO x /C@C-H 2 /Ar (SSC-H) composites are purposefully designed by in situ introduction of inorganic SiO x in pure Ar or H 2 /Ar atmosphere to realize a Si-based anode for LIBs. By introducing different atmospheres, the valence states of SiO x are regulated. The inorganic transition layer formed by the combination of SiO x with higher average valence and asphalt-derived carbon demonstrates better performance in both stabilizing the core-shell structure and inhibiting the agglomeration of Si particles. Given these advantages, the SSC-A electrode exhibits excellent electrochemical performance (1163 mAh g −1 after 400 cycles at 1 A g −1 ), and the commercial blended graphite-SSC-A electrode reaches a specific capacity of 442 mAh g −1 with 74.8% capacity retention under the same conditions. Even the SSC-A electrode without Super P maintains an ultrahigh discharge specific capacity of 803 mAh g −1 with 60.6% after cycling. Importantly, the full batteries based on SSC-A without Super P achieve a discharge specific capacity of 126 mAh g −1 with 28.2% capacity decay after 200 cycles, demonstrating the superior commercial application potential.
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高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2025
·Vol. 36
·期 2
·e70128
·
IF 3.4
Yang Zhang,Qingsong Li,Xi Xie,Guoxin Sui
Most polymers and composites suffer from high friction and wear due to their inherent lack of self-lubrication under dry sliding friction. Herein, the lamellar Ti 3 SiC 2 MAX material is prepared via vacuum sintering of a powder mixture containing Ti, Si, and TiC in the molar ratio of 1:1.1:1.8 at 1500°C under a pressure of 30 MPa for 2 h. Combined with a soft graphite phase (5 wt%), self-lubricating PEEK/Graphite/Ti 3 SiC 2 (PG-T) composites are successfully prepared, dependent on Ti 3 SiC 2 (5 and 15 wt%) as a hard reinforced phase and lubrication additive. PG-T composites are fabricated via a multistep compounding approach using a twin-screw extruder. The incorporation of Ti 3 SiC 2 and graphite within the PEEK matrix manifests a highly pronounced synergistic effect, which not only facilitates effective lubrication but also significantly enhances the load-bearing capability, thereby effectively circumventing direct contact between the counterface and the polymeric matrix. The sliding tests are conducted on the pins (diameter: 6.0 mm, height: 17.0 mm) and friction pair (45#steel, roughness Ra: 148 nm) under dry friction. In terms of PV-condition (up to 6 MPa and 3 m/s) (PV is a parameter that reflects the load-bearing capacity of polymer materials, which is defined by multi-plying the pressure P by the sliding speed V), PG5-T15 exhibits self-lubricating properties, featured by an average coefficient of friction (ACOF) as low as 0.119 for the pin-plate test and a specific wear rate (SWR) of only 0.58 × 10 −6 mm 3 /Nm. Meanwhile, PG-T composites present excellent thermal properties based on the thermal expansion coefficients (CTEs) and storage moduli (G′) during friction and wear. Considering the practical applications of tribo-composites, these findings highlight the potential of PG-T composite as a candidate for demanding tribological applications.
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高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Ruyi Sha,Bingzhu Wang,Jixiang Dai,Jianjun Sha
Ceramic aerogels are promising high-temperature thermal insulation materials due to their outstanding thermal stability and oxidation resistance. However, restricted by nanoparticle-assembled network structures, conventional ceramic aerogels commonly suffer from inherent brittleness, volume shrinkage, and structural collapse at high temperatures. Here, to overcome such obstacles, 3D ultralight and highly porous carbon tube foams (CTFs) were designed and synthesized as the carbonaceous precursors, where melamine foams were used as the sacrificial templates to form the hollow and thin-wall network structures in the CTFs (density: ∼4.8 mg cm–3). Then, the arbitrary-shaped silicon carbide (SiC) nanofibrous aerogels (SNFAs) were obtained through a simple chemical vapor deposition (CVD) process on the CTFs. The resulting SNFAs exhibited excellent comprehensive performances: ultralow density (4.2 mg cm–3) and thermal conductivity (21.3 mW m–1 K–1 at room temperature), excellent rigidity (specific modulus: 13.2 kN·m kg–1), and resilient compressibility. The SNFAs could support over 2100 times their weight without visible deformation. Furthermore, the SNFAs also showed exceptional high-temperature thermal stability, which means that they could withstand 1100 °C in an air atmosphere and 1550 °C in an inert atmosphere. These superior comprehensive performances enable SNFAs to be suitable for thermal insulation in harsh environments.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Dan Li,Kai Pan,Anqi Li,Juantao Jiang,Yao Wu,Jiakun Li,Fenghua Zheng,Fengqiang Xie,Hongqiang Wang,Qichang Pan
Silicon (Si) is considered a promising anode material for lithium-ion batteries (LIBs) due to its high theoretical specific capacity of up to 4200 mAh/g. However, the poor cycling and rate performances of Si induced by the low intrinsic electronic conductivity and large volume expansion during the lithiation/delithiation process limit its practical application. Herein, a novel silicon/bismuth@nitrogen-doped carbon (Si/Bi@NC) composite with nanovoids was synthesized and investigated as an advanced anode material for LIBs. In such a structure, ultrafine bismuth nanoparticles coupled with an N -doped carbon layer were introduced to modify the surface of Si nanoparticles . Subsequently, the lithiated Li x Bi has excellent high ionic conductivity and acts as a fast transport bridge for lithium ions . The introduced carbon coating layer and nanovoids can buffer the volume expansion of Si during the lithiation/delithiation process, thus maintaining structural stability during the cycling process. As a result, the Si/Bi@NC composite exhibits excellent electrochemical performance , providing a relatively high capacity of 955.8 mAh/g at 0.5 A/g after 450 cycles and excellent rate performance with a high capacity of 477.8 mAh/g even at 10.0 A/g. Furthermore, the assembled full cell with LiFePO 4 as cathode and pre-lithium Si/Bi@NC as anode can provide a high capacity of 138.8 mAh/g at 1C after 90 cycles, exhibiting outstanding cycling performance.
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高影响因子
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
·
2024
·
IF 2.4
He Minqi
The purpose of this study was to prepare amorphous silicon monoxide (SiO) at a low-temperature using a thermoelectric field coupling method. The sample was heated directly by an electric current using silicon (Si) and silicon dioxide (SiO 2 ) as raw materials. Experimental conditions included a stoichiometric mass ratio of raw materials, 10–13 pct conductive graphite doping, an external electric field of 600 V/cm, a current density of 10.57 A/cm 2 , and a furnace temperature range of 300–480 °C in a vacuum environment. A reddish-brown gas condensate with a Si:SiO 2 atomic fraction ratio of 49.86:50.14 was successfully prepared. The real-time voltage measurements divided the process into four stages. Results showed this method prepared amorphous SiO powder at a lower temperature, reducing furnace temperature by nearly 1000 °C compared to traditional methods, which is significant for lowering crucible temperatures in industrial silicon monoxide production.
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