DIAMOND AND RELATED MATERIALS
·
2024
·
IF 4.3
Li Sun,Jiacan Shao,Wensheng Ding,Keying Zhang,Hongyan Wang,Chong Chen,Guang Zhu
Direct synthesis of porous carbon nanosheets without adding any chemical activators or templates remains a great challenge. In this work, we present a novel and simple method to synthesize highly crumpled nitrogen-rich porous carbon nanosheets (HCNPCNS) by one-step procedure based on the direct carbonization of polyethylene and melamine. HCNPCNS consist of interconnected crumpled porous carbon nanosheets with a nanoscale thickness, an ultrahigh nitrogen content (10.3 at.%) and a mesopore-dominant, which thus ensure much more available surface area. As a result, the unique structures of HCNPCNS exhibit a high specific capacitance of 257.2 F g −1 in 6 M KOH and 265 F g −1 in 1 M H 2 SO 4 , high rate capability both in 6 M KOH and 1 M H 2 SO 4 , and long cycling stability of 96.7 % in 6 M KOH and 100 % in 1 M H 2 SO 4 when act as supercapacitor electrodes. Moreover, the HCNPCNS//HCNPCNS based supercapacitor in ionic liquid can deliver an excellent power density of 175 kW kg −1 and an energy density of 58.8 W h kg −1 . This strategy opens up a new avenue towards preparing porous carbon nanosheets without complicated procedure and particular chemical activators or templates for high performance supercapacitors .
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Decheng Li,Guyue Li,Yifan Yu,Chilin Li
Fluoride ion batteries (FIBs) have garnered significant attention due to their ultrahigh theoretical energy density, dendrite-free safety, and resource abundance. Although some anion acceptors have been proposed to address the insolubility of inorganic fluoride salts, the difficulty in dissociating fluoride ions from acceptors results in short lifespan and extremely low specific capacity of FIBs. Here, a fluoride ion battery is demonstrated with unprecedented long life and ultrahigh specific capacity through the design of an acceptor-multi-F state electrolyte. The high Lewis acidity of triphenylantimony chloride (TSbCl) as a novel anion acceptor in electrolyte facilitates the complete dissociation of CsF, and the resulting TSbCl-F complex can further interact with fluoride ions to form the acceptor-multi-F states. This strategy combines the high dissociation capability for fluoride salts with the minimal thermodynamic barriers for releasing fluoride ions at electrode-electrolyte interface. This electrolyte design endows FIBs with durable reversible fluorination/defluorination reaction (3700 cycles with high coulombic efficiency of 99.5% and small voltage polarization of 30 mV) and ultrahigh reversible capacity (580 mAh g −1 after 40 cycles at 100 mA g −1 ). The high-output voltage FIBs of CuF 2 //Li configuration (with discharge plateau of 2.9 V) and larger-sized pouch-type FIBs of CuF 2 //Sn+SnF 2 configuration (with reversible capacity of 530 mAh g −1 ) are demonstrated.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Shichao Wang,Feng Wei,Weiyao Geng,Ziquan Ren,Yaohui Lv
As a big agricultural country, china produces more than 40 million tons renewable rice husk (RH) per year. Accordingly, it is still a monstrous difficulty to realize its high value-added utilization. Herein, a simple strategy was reported to prepare the N, P, S doped hierarchical porous carbon (NPS-HPC) by potassium hydrogen carbonate activation combined with in-situ doping technique from RH. The as-obtained NPS-HPC owns superb surface area of 1976.8 m 2 g −1 , thin sheet-like structures and suitable content of heteroatoms, which supplies abundant active sites, enables electron fast transfer and boosts the redox reaction between C=O/P-O and Zn 2+ . Owing to the structural advantages, the NPS-HPC-based zinc ion hybrid capacitor (ZIC) obtains high discharge capacity of 198.56 mAh g −1 at 0.1 A g −1 , superb energy density of 167.69 Wh kg −1 and power density of 19.64 kW kg −1 . Moreover, the NPS-HPC-based ZIC also demonstrates long-term life with no decay over 23,000 cycles. This work furnishes an efficient strategy for the preparation of multi-heteroatoms doped hierarchical porous carbon from biomass waste for ZICs.
研究领域:
材料科学
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环境科学
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能源存储
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2014
·
IF 5.9
Zhong-Jie Jiang,Zhongqing Jiang
Nitrogen-doped holey graphene hollow microspheres (NHGHSs), synthesized through a template sacrificing method, were utilized as an anode material for lithium ion batteries (LIBs). Because of their specific microspherical hollow structure comprising nitrogen-doped holey graphene (NHG), the NHGHSs can exhibit reversible capacities of ∼1563 mAh g–1 at a low rate of 0.5 C and ∼254 mAh g–1 at a high rate of 20 C, which are significantly higher than the discharge capacity of the pristine graphene and other graphene-based carbonaceous materials. These, along with their good cycling stability, clearly demonstrate the great potential of using the NHGHSs as the anode material for LIBs of both high energy and power densities. We believe that the high specific surface area, holey structure of nitrogen-doped graphene, specific microspherical hollow structure, and increased interlayer spacing between the NHG nanosheets in their hollow walls are the main origins of their high electrochemical performance.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2017
·Vol. 9
·期 28
·10059-10066
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IF 7.367
Yan Zhang,Ting He,Guanglei Liu,Lianhai Zu,Jinhu Yang
In this paper, we report the successful design and synthesis of a hierarchically porous MoS2/C composite aerogel by simple one-pot mass preparation. The synthesis involves the in situ formation of MoS2 nanosheets on agarose molecular chains, the gelation of MoS2-deposited agarose monomers to generate a composite hydrogel, and in situ transformation of the composite hydrogel into a MoS2/C composite aerogel through carbonization. This composite aerogel can be used as a high-performance electrode material for supercapacitors and lithium-ion batteries. When tested as a supercapacitor electrode, it achieves a high specific capacitance of 712.6 F g−1 at 1 A g−1 and 97.3% capacity retention after 13 000 cycles at 6 A g−1. In addition, as a lithium-ion battery electrode, it exhibits a superior rate capability (653.2 mA h g−1 at 0.1 A g−1 and 334.5 mA h g−1 at 5.0 A g−1) and an ultrahigh capacity retention of nearly 100% after 1000 cycles at 1 A g−1. These performances may be ascribed to the unique structure of the MoS2/C composite aerogel, such as hierarchical pores, (002) plane-expanded MoS2 and interconnected carbon networks embedded uniformly with MoS2 nanosheets. This work may provide a general and simple approach for mass preparation of composite aerogel materials and pave the way for promising materials applied in both supercapacitors and lithium-ion batteries.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NANOTECHNOLOGY
·
2020
·Vol. 31
·期 43
·435410
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IF 3.551
Q Chen,Y F Yuan,S M Yin,M Zhu,G S Cai
Pomegranate-like C@TiO2 mesoporous honeycomb spheres have been synthesized through two simple steps: formation of TiO2 mesoporous honeycomb spheres and the coating of polypyrrole followed by carbonization. TiO2 mesoporous honeycomb spheres are of large specific surface area of 153 m2 g−1 and contain abundant mesopores, which leads to high electrochemical activity and good kinetic performance of TiO2. A layer of amorphous carbon shell with the thickness of 30–40 nm tightly encapsulates a TiO2 mesoporous honeycomb sphere, forming a novel pomegranate-like small sphere, which significantly improves electronic conductivity and structural stability of TiO2. Benefiting from the unique pomegranate-like structure, C@TiO2 mesoporous honeycomb spheres exhibit high specific capacity, stable long-term cycling performance and good rate capability as an anode material for lithium ion batteries (LIBs). After 500 cycles at 1 C, the discharge capacity still reaches 184 mAh g−1. The electrochemical performance is superior to pure TiO2 mesoporous honeycomb spheres and most of the reported high-performance TiO2-based composites. This work provides a new high-performance TiO2-carbon-based composite material for LIBs as well as a new valuable research strategy.
研究领域:
材料科学
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电化学
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能量存储
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Zhihui Wang,Rui Li,Guoqing Zhao,Xiaorong Yan,Xinyu Wang,HaiPing Yu,Yuxin Hao,Yujie Dai,Huige Ma,Mengxiao Li,Hongwei Li,Mingsheng Yang,Bei Wang,Jingru Liu,Mingjun Hu,Jun Yang
Sodium ion batteries (SIBs) have been regarded as a promising alternative to lithium-ion battery owing to low cost and good sustainability, but its competitiveness in energy storage is still limited largely by the development of suitable electrode materials. Traditional inorganic anode materials for SIBs face the problems of sluggish electrochemical kinetics and large volume strain due to the insertion/extraction of large size Na + . By comparison, organic anodes have the advantages of abundance resources, renewability, and designability, but suffer from the lack of stable electrode materials with both high specific capacity and low redox potential. Here, a class of pyrazine rings-rich organic polymers (polypyrazines) were designed and synthesized through external ligand-free nickel-catalyzed carbon–carbon coupling reactions. Among them, poly(2,6-pyrazine) shows the lowest synthetic cost, the highest porosity and the best conductivity. Consequently, as the anode of SIBs, poly(2,6-pyrazine) delivers a low redox potential (about 1 V, vs Na + /Na), high-specific-capacity (617.2 mA h/g at 0.1 A/g), excellent rate-capability (300 mA h/g at 10 A/g) and long-term cycling stability (81 % after 1000 cycles at 1.0 A/g). The low preparation cost and outstanding electrochemical performance of poly(2,6-pyrazine) make it a promising anode candidate for further boosting the energy density of SIBs.
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
Inorganics
·
2023
·Vol. 11
·期 4
·148
·
IF 2.9
Yan Guo,Junpo Guo,Bo Li,Yun Zheng,Wen Lei,Jiangmin Jiang,Jincheng Xu,Jingjun Shen,Jielei Li,Huaiyu Shao
The application of organic electrode materials can make the whole cycle of the lithium battery operation effective for green sustainability. However, poor electronic conductivity and strong solubility in nonprotonic electrolytes limit the application of organic anodes. Here, a novel organic anode material, TP-Ni, was fabricated through the simple chelation of tea polyphenols with nickel ions. Benefiting from coordination bonds that alter the intrinsic microstructure of TPs and contribute to pseudocapacitive charging, the TP-Ni anode exhibits remarkable electrochemical properties, including a high specific capacity (1163 mAh g−1at 0.1 A g−1), superb rate capability, and extraordinary cycling stability (5.0 A g−1over 4000 cycles with a capacity retention of 87.8%). This work can provide guidance for the design and synthesis of new high-performance organic electrode materials in the future and help accelerate the process of organic electrode material applications.Keywords:organic anode;chelation reaction;tea polyphenol;lithium-ion batteries;high performance
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
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2018
·
IF 2.21
Fei Xu,Hongtao Wang,Mengyi Wu,Jiangsai Nan,Ting Li,Shun-an Cao
Redox-active organic materials are potential cathode materials for material-sustainable and environment-friendly Li-ion batteries. As is one of the most prominent features for organic compounds, isomerism has a significant influence on their properties. Herein, we synthesize two isomeric pairs of poly(anthraquinonyl imide)s ( PAQI s) by a simple one-pot reaction, and investigate their electrochemical properties as Li-ion battery cathodes by cyclic voltammogram and galvanostatic discharge/charge cycling. The PAQI materials exhibit a high reversible capacity of 202 mAh g −1 and a stable cyclability with 80% capacity retention over 200 cycles, and a remarkable rate performance, suggesting a potential feasibility of these organic cathode materials for high-capacity Li-ion batteries. The discharge/charge potentials of these PAQI s are slightly lower than the monomers . A further comparison of these four PAQI s indicates the isomerism plays a significant role in the electrochemical performance of these organic electrode materials .
研究领域:
电化学
·
材料科学
·
能源存储
·
有机电极材料
·
锂离子电池
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Shuting Deng,Chenhui Wang,Zeyang Meng,Huo Yang,Wu Long,Yuxin Deng,Bo Hu,Daxiong He,Zhenggang Wang,Xichao Liang
Heterojunction electrode materials derived from MOFs have been shown to effectively improve capacity and rate performance. In this paper, ZnS/Co 9 S 8 (ZCS) heterojunction is successfully embedded in the three-dimensional spatial structure composed of cellulose fiber and MXene, forming a unique composite system by solvothermal method and electrostatic self-loading technology. ZCS particles are well dispersed to the fiber substrate and MXene, exhibited a large specific surface area of 54.80 m 2 g −1 and high level of structural defects, which providing abundant active sites for Li + . The Li ion battery prepared by ZnCoSCF@MXene (ZCSCF@MXene) exhibited high specific capacity of 1549.1 mAh g −1 at 1 A g −1 and excellent magnification performance of 632.3 mAh g −1 at 6.4 A g −1 . The outstanding performance of the ZCSCF@MXene electrode is due to multiple factors, such as the intrinsic electric field created by the ZCS heterostructure, the nitrogen-doped cellulose fiber matrix expanding the contact area between the electrode material and the electrolyte, and the MXene provides a swift route for electron transport, which not only boosts electron dynamics but also successfully prevents the aggregation of ZCS. This paper provides a reference for the composite of heterostructures with cellulose fiber, and provide a new idea for the design of negative electrode materials with high performance metal sulfide heterostructures.
研究领域:
材料科学
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储能
·
纳米技术
·
电化学
·
复合材料
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Runze Wang,Yuanyou Peng,Chunjin Ai,Meimei Yu,Guang Liu,Tianqi He,Jie Zhang,Junlong Chen,Shengqiang Nie,Fen Ran
Vanadium nitride is expected to address the energy density challenge of supercapacitors due to its excellent performance; however, its poor cycle life and rate performance limit its application potential. Compounding vanadium nitride with carbon materials can be a good solution, but a well-designed composite structure is required to fully exhibit the electrochemical properties. In this study, porous carbon composites embedded with vanadium nitride nanoparticles are constructed by a spray phase-inversion strategy. The composites have a mesh structure, which similar to cancellous bone, and exhibit good electrochemical performance as a supercapacitor anode material: the specific capacity reaches 431.5 F g–1 at the current density of 0.5 A g–1, and capacity retentions of 78.7% after 5000 cycles in a 6 M KOH electrolyte solution. The good performance is attributed to the fact that the carbon skeleton provides an efficient channel for the transfer of electrons and ions, and the vanadium nitride nanoparticles are effective in increasing the capacity while being well confined by the carbon skeleton. The porous structural composites are versatile and may have good potential for applications in other energy conversion and energy storage systems.
研究领域:
材料科学
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电化学
·
纳米能源材料
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储能技术
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功能复合材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ChemElectroChem
·
2020
·Vol. 7
·期 15
·3311-3318
·
IF 4.154
Jianfa Chen,Chong Lin,Mengmeng Zhang,Tianxiang Jin,Yong Qian
Graphical Double doping : We develop a simple and efficient method to prepare N and Se co-doped graphene aerogel (NSeGA) as binder-free electrodes for supercapacitor applications. The results proved that Se is an efficient doping element for carbon-based materials. Furthermore, benefiting from the synergistic effect between N and Se, the NSeGA electrode shows a high specific capacity of 302.9 F g −1 at 1 A g −1 , and a high capacity retention of >94 % after 12,000 cycles. In this work, we demonstrate the successful synthesis of nitrogen and selenium co-doping graphene aerogels (NSeGA) by a convenient and scalable approach. It was found that Se is an effective doping element for improving the energy storage performance of graphene. The synergistic effect between N and Se on improving the performance of supercapacitor was also confirmed. The binder-free NSeGA electrode exhibited a high specific capacity of 302.9 F g −1 at a current density of 1 A g −1 , which is much higher than that of singly Se-doped graphene aerogel (SeGA, 183.92 F g −1 ) and singly N-doped graphene aerogel (NGA, 150.16 F g −1 ). Even though the current density reached up to 10 A g −1 , 90.4 % of its specific capacitance was maintained. The NSeGA also maintained about 94.1 % of the initial capacitance after 12,000 cycles at a current density of 2 A g −1 . Moreover, the constructed NSeGA//NSeGA symmetric supercapacitor showed a high energy density of 26.3 W h kg −1 at a power density of 900 W kg −1 . Accordingly, as a new type of carbon-based material, NSeGA has a good prospect in the field of supercapacitors.
研究领域:
材料科学
·
电化学
·
储能技术
✓ 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）