锂离子电池正极材料硅酸亚铁锂的研究现状

Research status quo of lithium iron silicate cathode materials for Li-ion battery

介绍了锂离子电池正极材料硅酸亚铁锂(Li2FeSiO4)的结构及充放电特性,评述了合成Li2FeSiO4的方法,包括高温固相法、溶胶-凝胶法、微波法、水热法和水热辅助溶胶-凝胶法等。介绍了提高Li2FeSiO4电化学性能的研究,包括碳包覆、金属离子掺杂、形貌控制和高于1个Li+脱嵌的研究等。反应机理及实现高于1个Li+的脱嵌是相关研究的重点。

The crystal structure and charge-discharge characteristics of lithium iron silicate （Li2FeSiO4） as Li-ion battery cathode material were introduced,and the synthetic methods of Li2FeSiO4 including high-temperature solid phase method,sol-gel method, microwave method, hydrothermal method and hydrothermal-assisted sol-gel method were commented. The study to improve the electrochemical performance of Li2FeSiO4 were described in terms of carbon-coating, metal ion doping, morphology control and more than one Li＋ deintercalation. The future focus research of Li2FeSiO4 would be the reaction mechanism and the approach to achieve more than one Li＋ deintercalation.