摘要
钛酸锂(Li4Ti5O12)是一种“零应变”材料,在充放电过程中不会形成锂枝晶,消除了过充电对电池的安全隐患。本文系统的介绍了钛酸锂的制备方法和结构改性。在钛酸锂的合成方面固相法相对较为简单,生产效率高,较为适合工业中大批量生产,溶胶凝胶法则较为复杂,但得到的钛酸锂材料相对来说纯度、结晶度也比较高。在钛酸锂材料改性方面,纳米化、球化、多孔化都是以增大材料表面积提高材料的比容量;金属及离子掺杂改性主要是为了提高材料的导电性,其中不同的金属离子对材料的比容量有不同的影响。材料的表面复合改性是一种综合改性手段,是在提高材料比容量的同时提高材料导电性的一种改性手段。
Lithium titanate(Li4Ti5O12)is a“zero strain”material that does not form lithium dendrites during charging and discharging,eliminating the potential safety hazard of overcharging.In this paper,the preparation method and structural modification of lithium titanate were systematically introduced.In the synthesis of lithium titanate,the solid phase method is easier and the production efficiency is high,which is more suitable for mass production in industry.The sol-gel method is more complicated,but the obtained lithium titanate material has higher purity and crystallinity.In the modification of lithium titanate materials,nanocrystallization,spheroidization and porosity are increasing the specific capacity of materials by increasing the surface area of materials.Metal/ion doping modification is mainly to improve the conductivity of the material.Different metallic ions have different effects on the specific capacity of the material.The surface composite modification of materials is a comprehensive modification method,which is a modification method to improve the conductivity of materials while improving the specific capacity of materials.
作者
王鸣
黄俊涛
任亚航
梁萌
程丽丽
沈丁
WANG Ming;HUANG Juntao;REN Yahang;LIANG Meng;CHENG Lili;SHEN Ding(College of Materials Science and Engineering, Liaoning Technical University, Fuxin 123000, China)
出处
《功能材料》
EI
CAS
CSCD
北大核心
2020年第3期3047-3055,共9页
Journal of Functional Materials
基金
国家自然科学基金面上资助项目(51874167)
辽宁省自然科学基金重点项目材料联合基金资助项目(20180510034)
关键词
钛酸锂
负极材料
锂离子电池
比容量
lithium titanate
anode material
lithium ion battery
specific capacity
