锂离子电池磷酸铁锂正极材料的研究进展

摘要

Lithium iron phosphate olivine structure of security is very high,and is excellent in cycle performance at high temperatures can also be used,is the most promising battery cathode material.Lithium iron phosphate longer life cycle,and its discharge performance of other ion batteries can not be compared,at a high temperature stability is better,so that became the lithium iron phosphate battery cathode materials commonly used.However,the conductivity of lithium iron phosphate is not particularly desirable,and less than the diffusion coefficient of lithium ions at low temperatures can not play good results,so have some limitations. By analyzing the structure of lithium iron phosphate,performance,etc.,to a certain extent,can improve the performance of lithium iron phosphate.%橄榄石结构的磷酸铁锂的安全性非常高，而且其循环性能优异，在高温下也可以使用，是最有发展前景的电池正极材料。磷酸铁锂的循环寿命较长，而且其放电性能是其他的离子电池不能比的，在高温下稳定性比较好，使磷酸铁锂成为电池正极常用的材料。但是，磷酸铁锂的电导率并不是特别的理想，而且锂离子的扩散系数不足，在低温下不能发挥较好的效果，所以产生一定的局限性。通过分析磷酸铁锂的结构、性能等，在一定程度上可以完善磷酸铁锂的性能。