Comparative investigations of LiVPO4F/C and Li3V2(PO4)3/C synthesized in similar soft chemical route
作者： Jiexi Wang , Zhixing Wang , Xinhai Li , Huajun Guo , Wei Xiao
DOI: 10.1007/S10008-012-1846-9
关键词:
摘要: Triclinic LiVPO4F and monoclinic Li3V2(PO4)3 are synthesized through a soft chemical process with mechanical activation assist, followed by annealing. In this process, ascorbic acid is used as reducing agent well carbon source. The as-prepared samples coated amorphous carbon. XPS analysis results show the expected valency states of ions in Li3V2(PO4)3. electrochemical properties prepared LiVPO4F/C Li3V2(PO4)3/C cathodes evaluated. cathode shows an initial discharge specific capacity 140 ± 3 mAh g−1 at 30 mA voltage range 3.0~4.4 V, compared that 138 possessed Li3V2(PO4)3/C. Both exhibit good cycle performance different current densities. delivered remains 95.5 91.7 % its after 50 cycles 150 750 g−1, respectively, while 97.4 90.6 for But rate capability not so
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