期刊论文

Zhan, X.-H.

中文

功能材料

1001-9731

2009

40

2

230-232

10.3321/j.issn:1001-9731.2009.02.015

基金项目：国家自然科学基金资助项目（50774016） 湖南省科技攻关资助项目（05GK3015,05JTL079）

本校为第一且通讯机构

以碳酸锂、氧化钴为主要原料,掺入化学计量的超细二氧化锆、超细二氧化钛,按球料比3:1,在转速500r/min经1h行星式球磨后,经900℃固相烧结制备了锂离子电池正极材料LiCo_(0.9)Zr_(0.03_Ti_(0.07)O_2,用X射线衍射(XRD)、扫描电镜(SEM)对材料的结构与形貌进行了研究,结果表明LiCo_(0.9)Zr_(0.03_Ti_(0.07)O_2与LiCoO_2一样具有六方层状结构.在0.2C倍率下材料的初始放电容量达147mAh/g,2C倍率下初始放电容量达140.5mAh/g,3.6V放电平台比例达89.6%,500次循环后容量衰减7.5%,材料大电流放电性能好、循环寿命长.

A LiCo0.9Zr0.03Ti0.07O2 positive plate material of lithium ion battery was prepared by high temperature solid sintering at 900°C whose precursor was obtained using Li2CO3, Co3O4, and doping substance ultrofine ZrO2, ultrofine TiO2 by planetary grinding for 1 h, at 500 rotations per minute and the ball to material weight ratio (BMR) at 3:1. The micrographs and structure of this material were characterized by SEM, XRD. The results indicate LiCo0.9Zr0.03Ti0.07O2 has hexagonal lamellar structure. The first cycle capacity of prepared material were 147 mAh/g at 0.2 C rate, and 140.5 mAh/g at 2 C...