共 35 条
Self-assembled CoS2 nanoparticles wrapped by CoS2-quantum-dots-anchored graphene nanosheets as superior-capability anode for lithium-ion batteries
被引:132
作者:

He, Jiarui
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Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Peoples R China Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Peoples R China

Chen, Yuanfu
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Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Peoples R China Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Peoples R China

Li, Pingjian
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Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Peoples R China Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Peoples R China

Fu, Fei
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Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Peoples R China Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Peoples R China

Wang, Zegao
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Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Peoples R China Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Peoples R China

Zhang, Wanli
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h-index: 0
机构:
Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Peoples R China Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Peoples R China
机构:
[1] Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Peoples R China
基金:
国家高技术研究发展计划(863计划);
中国国家自然科学基金;
关键词:
Graphene;
Cobalt sulfides;
Quantum dots;
Wrapped;
Lithium-ion battery;
PERFORMANCE;
ELECTRODE;
HYBRID;
NANOCOMPOSITES;
FABRICATION;
COMPOSITES;
D O I:
10.1016/j.electacta.2015.09.131
中图分类号:
O646 [电化学、电解、磁化学];
学科分类号:
081704 ;
摘要:
For the first time, self-assembled CoS2 nanoparticles wrapped by CoS2-quantum-dots anchored graphene nanosheets (CoS2NP@G-CoS(2)QD) are synthesized by a facile L-cysteine-assisted hydrothermal reaction. When the composite is used as anode in lithium-ion batteries (LIBs), it shows superior electrochemical performance: the reversible specific capacity is as large as 1048 mAh g(-1); the 300th-cycle capacity still maintains 831 mAh g(-1) even at 1 A g(-1); the rate capacity remains 411 mAh g(-1) even at 10 A g(-1), which is the highest value ever reported at such high current density for CoS2 based materials. The excellent electrochemical performance is attributed to the unique structure with CoS2 nanoparticles homogeneously wrapped by highly flexible and conductive few-layer graphene nanosheets adhering abundant CoS2 quantum dots, which can effectively suppress the aggregation of CoS2 nanoparticles, accommodate the volume change during the cycle processes and maintain high electrical conductivity of the electrode. The CoS2NP@G-CoS(2)QD composite is promising for superior-capability anode for LIBs and can be further extended to broad applications in supercapacitors, sensors, and catalysis. (C) 2015 Elsevier Ltd. All rights reserved.
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页码:424 / 429
页数:6
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