Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 7, Issue 22, Pages 12057-12066Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b02242
Keywords
lithium-vanadium phosphate; inorganic carbon; lithium-ion battery; cathode
Funding
- project of the Innovative Group for High-Performance Lithium-Ion Power Batteries R&D and Industrialization of Guangdong Province [2013N079]
- China Scholarship Council
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Li3V2(PO4)(3) (LVP) particles dispersed in different inorganic carbons (LVP@C) have been successfully synthesized via an in situ synthesis method. The inorganic carbon materials With different dimensions including zero-dimensional Super P (SP) nanospheres, one-dimensional carbon nanotubes (CNTs), two-dimensional graphene nanosheets, and three-dimensional graphite particles. The effects of carbon dimensions on the structure, morphology, and electrochemical performance of LVP@C composites have been systematically investigated. The carbon materials can maintain their original morphology even after oxidation (by NH4VO3) and high-temperature sintering (850 degrees C). LVP@CNT exhibits the best electrochemical performances among all of the samples. At an ultrahigh discharge rate of 100C, it presents a discharge capacity of 91.94 mAh g(-1) (69.13% of its theoretical capacity) and maintains 79.82% of its Original capacity even after 382 cycles. Its excellent electrochemical performance makes LVP@CNT a promising cathode candidate for lithium-ion batteries.
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