Rational Design and Facial Synthesis of Li?V?(PO?)3@C Nanocomposites Using Carbon with Different Dimensions for Ultrahigh-Rate Lithi
By feng Mao, Wen; bao Fu, Yan; Zhao, Hui; Ai, Guo; ling Dai, Yi; Meng, Dechao; he Zhang, Xin; Qu, Deyang; Liu, Gao; Battaglia, Vincent S. & yuan Tang, Zhi
Published in ACS Applied Materials \& Interfaces
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2015
Abstract
Li?V?(PO?)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 NH?VO3) and high-temperature sintering (850 °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 lithi
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