Improving the performance of graphite anodes in rechargeable lithium batteries |
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| Affiliation: | 1. School of Materials Science and Engineering, Tianjin Key Laboratory of Composites and Functional Materials, Tianjin University, Tianjin 300072, China;2. Tianjin Special Equipment Inspection Institute, Tianjin 300192, China;3. Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China;4. Sino-European Institute of Aviation Engineering, Civil Aviation University of China, Tianjin 300300, China |
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| Abstract: | A low cost graphite was examined as a negative electrode for rechargeable lithium batteries. The use of an electrolyte solution consisting of LiPF6 (1 mol dm−3) in ethylene carbonate (EC) and dimethyl carbonate (DMC) at a volume ratio of 2:1 resulted in a capacity loss of 35% on the first cycle. When small quantities of dimethyl pyrocarbonate (DMPC) were added to the binary electrolyte system, the capacity loss on the first cycle was only 18% and thereafter a practical capacity value of 357 mA h g−1 was sustained for more than 50 cycles, representing more than 2000 h of cycling. |
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