锂离子电池用钛酸锂的研究进展

Research progress of Li_(4)Ti_(5)O_(12) for lithium ion battery

随着手机、笔记本电脑、电动汽车以及智能电网等领域对轻、小、高功率可充电锂离子电池(LIBs)需求的日益增加,高安全性、高功率、循环寿命长、低成本、环保的电极材料得到迅速发展。与目前锂离子电池中广泛使用的碳负极材料相比,钛酸锂(Li_(4)Ti_(5)O_(12))由于具有“零应变”结构特征,在锂离子脱嵌过程中结构几乎没有变化,具有较好的安全性和优异的循环性能,是长寿命储能型锂离子电池的首选负极材料之一。本文总结了近年来Li_(4)Ti_(5)O_(12)作为锂离子电池负极材料的研究进展,介绍了Li_(4)Ti_(5)O_(12)的结构和性能,重点讨论了Li_(4)Ti_(5)O_(12)的制备和改性方法以及改性对Li_(4)Ti_(5)O_(12)电化学性能的影响,并对今后Li_(4)Ti_(5)O_(12)在锂离子电池负极材料领域的发展进行了展望。

With the increasing demand for light,small and high-power rechargeable lithium ion batteries in mobile phones,notebook computers,electric vehicles,smart grids and other fields,electrode materials with high safety,high power,long cycle life,low cost and environmental protection are developing rapidly.Compared to the carbon anode materials in lithium ion batteries,lithium titanate(Li_(4)Ti_(5)O_(12))has good safety and excellent circulation performance due to its zero strain structure feature.This special structure is almost no change in the lithium ion extraction/insertion process.Thus,Li_(4)Ti_(5)O_(12) is the first selection of long-life energy storage type lithium ion battery cathode materials.In this paper,the research progress of lithium titanate as anode material for lithium ion battery in recent years is summarized,the structure and properties of lithium titanate are introduced,the preparation and modification methods of Li_(4)Ti_(5)O_(12) and the influence of modification on the electrochemical properties of Li_(4)Ti_(5)O_(12) are discussed emphatically.The future development of lithium titanate in the field of lithium ion battery anode material is also prospected.