LiFePO4电化学反应机理、制备及改性研究新进展  

New Research Progress of the Electrochemical Reaction Mechanism,Preparation and Modification for LiFePO_4

作　　者：张英杰[1] 朱子翼 董鹏[1] 邱振平[1] 梁慧新[1] 李雪[1] 

机构地区：[1]昆明理工大学锂离子电池及材料制备技术国家地方联合工程实验室云南省先进电池材料重点实验室(筹),昆明650000

出　　处：《物理化学学报》2017年第6期1085-1107,共23页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金(51604132)资助项目~~

摘　　要：作为用于可持续能源的有效能量存储装置,锂离子电池因具有优异的电化学性能而得到广泛研究,是非常有发展潜力的储能电池体系,其技术发展及应用的关键在于电极材料的研发。LiFePO_4作为锂离子电池正极材料之一,具有循环寿命长、能量密度大、充放电平稳、热稳定性良好、安全性好、重量轻和低毒性等优点,备受国内外专家的专注。然而,LiFePO_4正极材料的研究还存在一些技术瓶颈,由于其存在电导率相对较低、锂离子扩散系数小以及振实密度不高等问题,导致循环性能、低温特性和高倍率充放电性能等并不理想,因而制约着它的应用和发展。近几年研究工作者通过改进制备工艺以及进行相关改性研究,旨在逐步解决上述问题。本文简要综述了LiFePO_4正极材料的最新研究成果,就其结构特征、电化学反应机理、制备方法和改性进行了系统介绍。探讨了目前LiFePO_4正极材料面临的主要问题及可能的解决策略,并对其未来的研究方向和应用前景进行了展望。Lithium-ion batteries have been extensively studied due to their excellent electrochemical performance as an effective energy storage device for sustainable energy sources. The key to the development and application of this technology is the improvement of electrode materials. LiFePO4 has captured the attention of researchers both home and abroad as a potential cathode material for lithium-ion batteries because of its long cycle life, energy density, stable charge/discharge performance, good thermal stability, high safety, light weight and low toxicity. However, there are still some technical bottlenecks in the application of LiFePO4, such as relatively low conductivity, low diffusion coefficient of lithium ions, and low tap density. Moreover, the cycle performance, low-temperature characteristics, and rate performance are not ideal, restricting its application and development. In recent years, researchers have sought to solve these problems by improving the preparation process and attempting related modifications. In this paper, we have provided a systemic review of the structure, electrochemical reaction mechanism, preparation, and modification of LiFePO4. The main problems associated with LiFePO4 cathode materials and possible solutions are discussed. We have also investigated the future research direction and application prospect of LiFePO4 cathode materials.

关 键 词：LIFEPO4 研究进展 电化学反应机理 制备方法 改性 

分 类 号：TM912[电气工程—电力电子与电力传动] TQ131.11[化学工程—无机化工]