摘要
采用分阶段固相烧结法进行钛酸锂负极材料Li_(4)Ti_(5)O_(12)的制备,实验结果表明,少量Zr^(4+)掺杂后并未改变Li_(4)Ti_(5)O_(12)的尖晶石结构类型,但引起晶格常数的变化,掺杂前后颗粒都呈圆球形,且都比较均匀细小。循环充放电实验表明,当Zr^(4+)掺杂量在0~0.2变化时,随着Zr^(4+)掺杂量的增多,充放电比容量明显增大,且充放电平台更平稳。这主要是由于Zr^(4+)掺杂引起晶格的畸变,降低了Li+嵌入与脱嵌的阻力,进一步证实Zr^(4+)掺杂能够改善Li_(4)Ti_(5)O_(12)负极材料的充放电效果。
In the paper,an anode material Li_(4)Ti_(5)O_(12) was prepared through the method of solid phase sintering by stages.The results showed that a small amount of Zr^(4+) doping didn't change the spinel lattice type of Li_(4)Ti_(5)O_(12),but caused the variation of lattice constants.The particles were all spherical before and after Zr^(4+) doping,uniform and fine.The charge/discharge cycling test showed that,when the Zr^(4+) concentration was changed from 0 to 0.2,the capacity of charge/discharge increased significantly and the platform was more stable with the increase of the amount of Zr^(4+) doping,which was mainly due to the lattice distortion caused by Zr^(4+) doping and the resistance of Li^(+) embedding and extraction being reduced.It further confirmed that Zr^(4+) doping was able to improve the charge/discharge efficiency of anode material Li_(4)Ti_(5)O_(12).
作者
王能为
万书权
孙艳
Wang Nengwei;Wan Shuquan;Sun Yan(College of Vanadium and Titanium,Panzhihua University,Panzhihua 617000)
出处
《化工新型材料》
CAS
CSCD
北大核心
2022年第11期74-77,共4页
New Chemical Materials
基金
博士科研启动资金:铜铟镓硒薄膜太阳能电池制备及其光电转换效率研究(035200026)。
