Journal
JOURNAL OF POWER SOURCES
Volume 326, Issue -, Pages 203-210Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2016.06.124
Keywords
Li ion batteries; Cathode materials; Lithium vanadium phosphate; Phase change
Funding
- National Natural Science Foundation of China [51403209, 21406221, 21501171, 51177156/E0712]
- Youth Innovation Promotion Association (CAS)
- 100 Talents Program of Dalian Institute of Chemical Physics
- Natural Sciences Foundation of Liaoning Province of China [2013020126]
- Hubei Province-Chinese Academy of Sciences Cooperative Project
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The exploration of cathode materials with high capacity and power, fast charge/discharge rate, long lifespan and broad temperature adaptability is a challenge for the practical application of lithium ion batteries. Here, submicro-sheet Li3V2(PO4)(3)/C (LVP/C) cathode materials have been successfully synthesized via a simple and universal phase-change method. This designed melting process increases the crystallinity and decreases the Li+ diffusion distance, which effectively enhances the cycling stability and rate performances of the LVP/C cathode materials. The LVP/C cathode materials exhibit high discharge specific capacity of 130 mAh g(-1) in the first cycle. The capacity retention is almost 100% after 100 cycles. In addition, at 10 C, more than 80% of initial discharge capacity is retained after 800 cycles, indicating excellent cycle performance at high rate. Moreover, the synthesized LVP/C materials perform excellent low-temperature properties. At -20 degrees C, the specific capacity can reach 105 mAh g(-1) at 0.5 C. This study provides a novel template-free synthesis method for nano/micro materials. (C) 2016 Elsevier B.V. All rights reserved.
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