Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 40
·19358-19370
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IF 9.931
Yi Guo,Yin Zhang,Yun Zhang,Mingwu Xiang,Hao Wu,Huakun Liu,Shixue Dou
An alternative strategy for blocking the shuttling of soluble polysulfides in lithium–sulfur (Li–S) batteries involved introducing an interlayer between the cathode and separator. However, tailoring the interlayer components, structure, and chemistry to realize efficient conversion of polysulfides into insoluble lithium sulfides remains challenging. Herein, a flexible self-standing hybrid interlayer is engineered by intertwining one-dimensional (1D) V2O5 nanowires (NWs) with graphene nanoscrolls (GNS) into a robust interconnected 3D network to be used as both an upper current collector and physical/chemical polysulfide-trapper. The highly conductive and open GNS framework provides bicontinuous transfer channels for rapid electron and ion transport across the cathode/separator interface. Meanwhile, the V2O5 NWs act as ideal redox mediators to dynamically block polysulfide dissolution and facilitate their conversion into sulfides via formation of active intermediate polythionate complexes. Therefore, these cells with 70 wt% sulfur content in the whole cathode have significantly improved performance with a long cycling life (1000 cycles), low capacity decay (0.041% per cycle), and considerable areal capacity (>4 mA h cm−2), even at a high sulfur loading of 5.5 mg cm−2. This novel interlayer design strategy has great potential for promoting the practical use of Li–S batteries.
研究领域:
电化学
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能源材料
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纳米材料科学
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储能技术
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界面化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Yuezhen Mao,Rongna Chen,Huanhuan You,Yang Liu,Sunrui Luan,Li Hou,Faming Gao
Antimony-based anodes possessing advantages of stable operating voltage and high theoretical capacity can replace graphene as alloy-based electrodes material in LIBs applications. However, the problems of capacity decaying and poor stability of Sb-based materials due to volume expansion and structural crushing during the long-term cycling remain to be solved. Therefore, we propose a strategy of using S and N co-doped carbon nanofibers encapsulated with Sb nanoparticles to overcome the above problems. The proposed material exhibits an excellent lithium storage performance with a high reversible specific capacity of 734 mAh g −1 at 0.1 A g −1 after 50 cycles (474.8 mAh g −1 at 1 A g −1 after 800 cycles, 394.5 mAh g −1 at 2 A g −1 after 2000 cycles). Importantly, a specific capacity of 288.5 mAh g −1 remains after more than 5000 cycles. The superior electrochemical performance of the S and N co-doped electrode is attributed to the proven structure and stability of the carbon matrix alleviating the volume changes of Sb during the process of lithium intercalation and extraction. The alloying/de-alloying reactions of the S@Sb@N-CNFs composite in the first charging/discharging process were systematically investigated by ex-situ XRD . This strategy of S and N co-doped carbon matrix could establish Sb-based materials as potential high-performance anodes for LIBs.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
DOI
高影响因子
Energy Storage Materials
·
2024
·
IF 18.9
Ziqiang Liu,Xiao Fu,Zhendong Li,Dingcheng Guo,Zhe Peng,Ruijuan Xiao,Xiayin Yao
Lithium metal anode has attracted increasing attention due to its ultra-high theoretical specific capacity and low redox potential. However, the severe interface problems caused by the parasitic reactions at the anode/separator interface greatly hinder its applications. Herein we design a 3D lithium−boron (LiB) fiber integrated lithium anode with polypropylene separator through the interfacial adhesive strategy with poly(vinylidene fluoride- co -hexafluoropropylene)-based polymer electrolyte. The 3D Li/LiB anode after chemical etching can increase the exchange current density to 36.8 mA cm −2 , which is about 14 times the value of the pristine anode with 2.6 mA cm −2 . Meanwhile, the poly(vinylidene fluoride- co -hexafluoropropylene)-based polymer electrolyte ensures high ionic conductivity and interfacial stability. Thus, the integrated anode with 3D electron/ion conductive network can guide Li deposition away from the unsafe anode/separator interface, and directly suppress the growth of lithium dendrites. As a result, the integrated anode with LiNi 0.83 Mn 0.06 Co 0.11 O 2 cathode exhibits an excellent discharge capacity of 168.3 mAh g − 1 at a high current density of 5 C. Besides, the rigid LiB skeleton coupling with flexible PVDF-HFP-based polymer electrolyte can effectively prevent the pulverization of lithium anode during long-term cycling, showing superior cycling stability of 1000 cycles at 1 C with a capacity retention of 76 %. This work provides a promising integrated anode for stable lithium metal batteries without lithium dendrite growth.
研究领域:
能源材料
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电化学
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电池技术
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材料科学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Cheng Wang,Yue Wu,Jing Gao,Xiaolin Sun,Qing Zhao,Wenyan Si,Yuan Zhang,Kun Wang,Fuhua Zhao,Takeo Ohsaka,Futoshi Matsumoto,Changshui Huang,Jianfei Wu
Due to the high energy density, high safety, and low cost of sulfur, all-solid-state lithium–sulfur batteries (ASSLSBs) are considered one of the most promising next-generation energy storage devices. Nevertheless, the insufficient interfacial contact between solid electrolytes (SEs) and the active material of sulfur leads to inadequate electronic and ionic conduction, which increases interfacial resistance and capacity decay. In this paper, commercial carbon nanotubes (CNTs) are activated to form porous-CNTs (P-CNTs), which are used as sulfur-bearing matrix, forming S@P-CNTs-based composite cathodes for ASSLSBs. Compared with CNTs, P-CNTs possess a larger specific surface area and more oxygen-containing groups, providing enhanced interfacial contact and stability between S@P-CNTs and Li6PS5Cl SE, which are confirmed by scanning electron microscopy, X-ray photoelectron spectroscopy, and density functional theory calculations. Moreover, P-CNTs can form a 3D conductive network in the composite cathodes, facilitating the migration of electrons and the diffusion of ions, as well as improving the utilization of sulfur. As a result, the S@P-CNTs-based ASSLSBs display excellent electrochemical performances, especially rarely reported ultralong lifespan, which deliver a capacity of 1099.2 mA h g–1 at a current density of 1.34 mA cm–2, and remarkably maintain 70.4% of the initial capacity over 1400 cycles.
研究领域:
材料科学
·
储能技术
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纳米技术
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电池技术
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
·
IF 5.4
Min-yu Li,Yuan-lin Yan,Xing-hai Zhou,Yuan Gao,Gang Wang,Li-hua Lyu,Yong-fang Qian,Shang-ru Zhai,Hong-zhu Liu,Zhong-gang Wang
Carbon aerogel exhibits unique advantages in microwave absorption and infrared stealth applications owing to its ultralow density, high porosity, and continuous three-dimensional conductive networks. Nevertheless, developing carbon aerogel with excellent mechanical robustness to meet the practical application demands remains a significant challenge. Herein, a lightweight and robust aerogel assembling with biomass-derived magnetic nickel/carbon (Ni/C) nanoparticles and aramid nanofibers (ANF) is successfully constructed. The magnetic Ni/C nanoparticles are synthesized via an innovative wet-spraying technique that fully exploits the strong chelation capability of biomass sodium alginate toward metallic nickel ions. After high-temperature carbonization, this process yields magnetic Ni/C nanoparticles with high specific surface area, and offers advantages of simple processing procedures and high yield. Concurrently, the ANF is fabricated by a scalable top-down deprotonation approach, acting as a supportive skeleton to ensure structural integrity and mechanical robustness. The optimized aerogel delivers a unique lamellar network architecture with an ultra-low density of 0.0168 g/cm 3 and outstanding elastic recovery exceeding 95 % after 100 cycles at 40 % strain. Consequently, the optimized aerogel delivers remarkable electromagnetic microwave absorption (EMA) performance, achieving a minimum reflection loss (RL min ) of −49.497 dB at 14.87 GHz, and an effective absorption bandwidth (EAB) of 5.41 GHz at a thickness of 2.0 mm. Simultaneously, the optimized aerogel exhibits excellent infrared (IR) stealth capability. After being exposed to IR radiation for 60 min on a heating platform at 80 ℃, the surface temperature of the optimized aerogel only rise from 25.3 ℃ to 26.9 ℃. This study provides a strategic paradigm for designing aerogel material with balanced mechanical properties and multi-functional performance.
研究领域:
材料科学
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纳米技术
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电磁学
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红外技术
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复合材料
✓ 已验证
产品关联
DOI
高影响因子
CARBON
·
2024
·
IF 10.5
Yuhao Dong,Di Lan,Shuang Xu,Junwei Gu,Zirui Jia,Guanglei Wu
In order to overcome the limitations of single attenuation mechanism materials in effectively absorbing electromagnetic waves (EMW), meticulous microstructural design of composites and an elevated degree of integration of wave absorbing mechanisms are crucial. Utilizing mesoporous hollow carbon spheres as precursors, PCHM@Co m X n (X = Se, S, O) nano-microspheres were synthesized by anchoring cobalt nanoparticles on the surface, controllable encapsulating in continuous fiber structure by electrostatic spinning technique subsequently. The carbon shell-cavity core configuration interspersed with nanoparticles has the advantage of light weight, low density and extensive defects. Abundant heterogeneous interface in carbon fiber offers excellent electrical conductivity and high specific surface area, while a three-dimension conductive network optimizes the transmission loss to incident EMW. The efficient synergy of multiple mechanisms enables PCHM@CoSe 2 /CNFs to achieve a strong reflection loss of −50.55 dB at a matched thickness of 2.0 mm, while the EAB max value can be extended to a remarkable 6.80 GHz at 2.3 mm, which is considerably superior to fiber samples encapsulating other cobalt-based nanoparticles of the same family. This work provides an innovative direction for the development of high-performance EMW absorbers.
研究领域:
材料科学
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电磁工程
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Nano Research
·
2024
·
IF 9.5
Guo Chan,Shao Shiping,Zhang Xin,Tang Yunxiang,Wang Luxue,Liu Jiurong,Wu Lili,Bi Ke,Wang Fenglong
Aerogel-based composites hold promising application prospects as potential electromagnetic wave (EMW) absorption materials, yet the construction of such materials with ingenious microstructures, appropriate magnetic/dielectric multi-components, and integrated multifunctionality remains considerably challenging. Herein, a multicomponent Co/MnO/Ti 3 C 2 T x MXene/rGO (CMMG) hybrid aerogel featured with three-dimensional (3D) vertical directional channel architecture is reported. Benefiting from the synergistic effect arising from the 3D conductive networking structure, diverse heterogeneous interfaces, magnetic/dielectric multicomponent, and multiple loss pathways, the optimized CMMG-2 aerogel delivers fascinating EMW absorption capabilities, characterized by a minimal reflection loss (RL min ) of −77.41 dB and an effective absorption bandwidth (EAB) of 6.56 GHz. Additionally, the remarkable hydrophobicity, exceptional thermal insulation capabilities, and outstanding photothermal properties of CMMG-2 aerogel make it highly promising for multiple application in diverse and demanding environments. Interestingly, the distinctive pore structure of hybrid aerogel also allows it for sensitive and reliable detection of electrical signals caused by pressure changes and human motion. Thus, this research provides a viable design strategy for the development of lightweight, efficient, and multifunctional aerogel-based EMW absorption materials for various application scenarios.
研究领域:
材料科学
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纳米技术
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电磁工程
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热工程
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传感技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Electronic Materials
·
2025
·
IF 4.7
Yu-Han Wang,Wen-Hao Geng,Yue-Xin Wang,Ze-Long Bao,Xuan-Chen Liu,Jing-Yi Feng,Wen-Yi Sun,Wei-Wei Cao,Hong-Zhang Geng
Motivated by the advancement of 5G communication technology, electronic devices encounter the challenge of performance fluctuations when exposed to multiband electromagnetic radiation and subjected to temperature variations. Aiming at the problem of limited performance of single-component materials, this paper proposes a design strategy for synergistically enhanced composite films. Through the collaborative action of multiple components and modulation of multidimensional architectures, the performance limitations of functional materials are overcome. Caffeic acid (CA) is employed to modify the surface of multiwalled carbon nanotubes (MWCNTs), and a three-dimensional interconnected conductive network is assembled with MXene nanosheets. Through the hydrogen-bond interfacial strengthening effect, combined with aramid nanofibers (ANF) as the matrix, CA-MWCNTs/MXene-ANF composite films are prepared. This composite film retains excellent mechanical properties with a tensile strength of 49.5 MPa and an elongation at break of 6.4%, exhibits an electromagnetic shielding effectiveness of 46 dB in the X-band, and possess a rapid electrothermal response capability, achieving a temperature increase from room temperature (25 °C) to 169 °C within 10 s when powered by a low voltage of 3 V. It overcomes the performance limitations resulting from the nonuniform dispersion of conventional fillers and poor interfacial adhesion. These advantages endow it with significant potential in diverse fields such as smart wearables, aerospace engineering, flexible electronics, and medical applications.
研究领域:
材料科学
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纳米技术
·
电磁兼容
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聚合物复合材料
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柔性电子
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POROUS MATERIALS
·
2024
·
IF 2.5
Zhang Wenhui,Wu Xinbo,Wang Dazhi,Cai Weijie
As the frequency range of electronic devices gradually expands, exploring frequency insensitive electromagnetic wave adsorption (EWA) materials that can achieve effective absorption in all bands has aroused great interest. A series of Fe 1 − x S@C composite materials with three-dimensional conductive networks were successfully prepared in this work. In the preparation process, poly (aryl ether sulfone) with branched carboxylic (PAES-C) was selected as the skeleton and Fe 3+ ions were introduced via chemical adsorption. The main purpose of this work was to develop array porous composite materials with good EWA property. The work proposed a novel controllable method for preparing metal sulfides to explore the electromagnetic wave absorption. This routine was also developed to prepare other M x S@C composites (M = Fe, Cu, Mn). Compared to Mn x S@C and Cu x S@C composites, the RL min value of Fe 1 − x S@C-4 was − 40.6 dB at 13.52 GHz, and at a thickness of 1.5 mm the effective bandwidth reached 3.12 GHz. Furthermore, its effective absorption band covered Ku, X, and C radar bands at different thicknesses.
研究领域:
材料科学
·
电磁材料
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复合材料
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电磁波吸收
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Haiquan Zhang,Susu He,Qiadong Yao,Bozhou Cao,Fuge Wang,Ning Wang
Advanced thermal management in phase change materials (PCMs) requires innovative solutions to simultaneously address three critical challenges: leakage prevention, thermal/electrical conductivity enhancement, and thermal energy storage optimization. Our research demonstrates that strategic incorporation of one-dimensional (1D) nanostructured additives coordinates the inherent contradiction between preventing liquid leakage, electro-thermal energy conversion, and thermal storage density. The composite system exhibits enhanced leak resistance through synergistic intermolecular interactions and physical fixation of the terephthalic acid manganese skeletal framework (TAMn, 0.5–2 μm particle size). Concurrently, optimized dispersion of carbon nanotubes (CNTs) creates a three-dimensional conductive network that significantly enhances both thermal transport ( k PCMs , 3× thermal conductivity enhancement) and electrical properties ( δ PCMs , 4 orders of magnitude conductivity increase). The meso-microscale CNT framework modulates intermolecular interactions between hydroxyl and carboxyl groups. The incorporation of CNTs into the PEG/TAMn3 composite system results in a significant enhancement of energy storage density from 96.5 J g −1 to 113.5 J g −1 , accompanied by a simultaneous improvement in energy storage efficiency from 71.1 % to 97.4 %. This dual-phase engineering approach establishes a new paradigm for developing high-performance PCM composites that maintain dimensional stability while dramatically improving energy transfer capabilities. Consequently, PCM composites demonstrate high-efficiency energy transduction from electrical to thermal forms, facilitating both thermal energy storage and precise temperature regulation of the material system.
研究领域:
材料科学
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能量存储与转换
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纳米技术
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热工学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2021
·
IF 6.558
Zhongdong Wu,Zihan Li,Gangyong Li,Xuchao Zheng,Yuhe Su,Yan Yang,Youwei Liao,Zongqian Hu
Enzymes are promising electrocatalysts in many biological processes . We proposed two strategies, co-immobilization and three-dimensional (3D) space design, to strengthen electron transfer (ET). In this research, DNA base and CNT were mixed in an aqueous solution; then the mixture was dried and ground. Finally, the powder was annealed in N 2 to obtain DNA derived N-doped 3D conductive network ( [email protected] ). [email protected] immobilized mediators on itself through adsorption. Such 3D space structure shows high activity toward a set of critical electrochemical reactions and high-performance in enzymatic biofuel cells (EBFCs). It is found that [email protected] conductive network possesses an interconnected porous structure and well-developed porosity. As a result, the membrane-less EBFCs equipped with enzyme/mediator co-immobilization [email protected] bioelectrodes were measured in a model 5 mM glucose-containing aqueous solution, human serum, and rabbit whole blood, respectively, which can generate 0.34, 0.078, and 0.15 mW cm −2 power density, respectively. The constant-current discharge method carried out in a model 5 mM glucose-containing aqueous solution shows that the discharge time reached 19 h at a discharge current density of 0.01 mA cm −2 . The membrane EBFCs can deliver a high open circuit voltage of 0.68 V, a short-circuit current density of 2 mA cm −2 , and a maximum power density of 0.5 mW cm −2 .
研究领域:
生物化学
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材料科学
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电化学
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生物技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 13
·6191-6200
·
IF 3.3
Jiangzhi Xiong,Peng Xiao,Jian Luo,Yangjie Li,Peng Zhou,Liang Pang,Xilei Xie,Yang Li
Structural instability due to huge volume changes of silicon during charging and discharging limits its commercial applications. In this work, we prepare a novel fluorine-modified integrated silicon/carbon anode (denoted as F-SC), consisting of yolk–shell particles and hierarchical porous carbon sheets, via a simple one-step self-sacrificing strategy. This integrated structure requires no acid or base etching, making it more efficient and environmentally friendly than other template strategies. Detailed analysis of various characterization studies reveals that the well-designed structure can build a satisfactory expansion space for silicon, enhance lithium-ion reaction kinetics, offer stable interfacial contacts, and establish a three-dimensional conductive network. As a lithium-ion battery (LIB) anode, the prepared composite demonstrates a high initial coulombic efficiency (ICE) of 83.3%, a distinguished reversible capacity of 1013 mA h g−1 at 1 A g−1 after 400 cycles with an average Coulomb efficiency of 99.4% and a superior rate ability of 987 mA h g−1 at an ultrahigh rate of 5 A g−1. The reaction kinetics verify the synergy of solid-state diffusion and surface-controlled reactions. The current research can provide powerful ideas for the rapid commercialization of advanced silicon-based materials.
研究领域:
材料科学
·
能源存储
·
电化学
·
纳米技术
✓ 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）