磷酸铁锰锂正极材料的制备及性能研究进展

发布时间：2018-02-20 06:37

本文关键词： 正极材料磷酸铁锰锂制备电化学性能　出处：《化工新型材料》2016年09期 　论文类型：期刊论文

【摘要】：锂离子电池因具有比能量高、循环使用寿命长、无记忆效应等特点而备受关注,并已广泛应用于日常生活中。锂离子电池中,正极材料制约着电池性能和价格,因而锂离子电池正极材料的研究意义深远。在已有的锂离子正极材料中,橄榄石型磷酸盐正极材料具有能量密度高、放电比容量大、电压平台高等优点,有望应用于高端领域,但部分磷酸盐材料存在电导率低、高倍率充放电损失、多循环容量衰减等问题。简单介绍了几种磷酸盐材料的研究状况,并重点综述了不同制备方法、不同铁、锰比例合成的磷酸铁锰锂结晶形态、颗粒尺寸及电化学性能的研究进展。分析表明磷酸铁锰锂作为新型磷酸盐材料存在3.4和4.1V两个放电平台,放电容量可达145mAh/g,优势明显。若采用表面修饰或离子掺杂等改性方法对其进一步优化,该材料的性能可能会更使人满意。
[Abstract]:Lithium ion battery with high specific energy, long cycle life, no memory effect and concern, and has been widely used in daily life. The lithium ion battery, cathode material restricts the battery performance and price, so the cathode materials for lithium ion batteries have far-reaching significance. In the study of lithium ion battery anode materials have in the olivine type phosphate cathode materials with high energy density, large discharge capacity, high voltage platform, is expected to be applied to the field of high-end, but some existing phosphate materials with low conductivity, high rate discharge loss, multi cyclic capacity decay and other issues. This paper introduces the research status of several kinds of phosphate materials, and reviews different preparation methods, different proportion of synthetic iron, manganese iron phosphate lithium manganese crystal morphology, size and research progress of electrochemical properties of particles. The results show that lithium iron manganese phosphate as phosphorus model Acid salt materials exist 3.4 and 4.1V two discharge platform, discharge capacity is 145mAh/g, the advantage is obvious. If the surface modification and ion doping modification method to further optimize the performance of the material would be more satisfactory.

【作者单位】：兰州理工大学石油化工学院;
【基金】：甘肃省教育厅高校科研项目(2014A-034) 甘肃省科技计划(1310RJZA043)
【分类号】：TQ131.11;TM912

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