| 尖晶石LiNi_(0.5)Mn_(1.5)O_4中掺杂Fe的作用机理 |
| |
| 引用本文： | 刘国强.尖晶石LiNi_(0.5)Mn_(1.5)O_4中掺杂Fe的作用机理[J].稀有金属材料与工程,2016,45(7):1755-1759. |
| |
| 作者姓名： | 刘国强 |
| |
| 基金项目： | 国家自然科学基金(51274057)、国家863计划项目（2013AA030902）和省自然科学基金资助 |
| |
| 摘 要： | 利用湿化学法结合固相反应法制备了尖晶石LiNi_(0.5)Mn_(1.5)O_4和掺杂Fe的LiNi_(0.45)Fe_(0.1)Mn_(1.45)O_4材料,从晶体结构、表面形貌、充放电曲线特点、倍率性能等方面比较了掺杂Fe以后对材料的影响,并结合热重实验,通过测试失重量,进而分析了材料中的氧缺陷含量,推导出掺杂Fe的作用机理:尖晶石LiNi_(0.5)Mn_(1.5)O_4材料中掺杂Fe元素,能够使材料晶体中保持一定的氧缺陷,从而使得材料含有一定量的Mn~(3+),提高了材料充放电倍率性能。
|
| 关 键 词： | 锂离子电池 尖晶石晶体 正极材料 铁掺杂 充放电性能 |
| 收稿时间： | 2014/6/22 0:00:00 |
| 修稿时间： | 7/7/2014 12:00:00 AM |
Affecting Mechanism of Doping Fe in Spinel LiNi0.5Mn1.5O4 |
| |
| liuguoqiang.Affecting Mechanism of Doping Fe in Spinel LiNi0.5Mn1.5O4[J].Rare Metal Materials and Engineering,2016,45(7):1755-1759. |
| |
| Authors: | liuguoqiang |
| |
| Affiliation: | Northeastern University |
| |
| Abstract: | Spinel LiNi0.5Mn1.5O4 and Fe-doped compound LiNi0.45Fe0.1Mn1.45O4 were synthesized by a wet chemical method combining a solid state reaction process. The comparison from the aspects of crystal structure, surface morphology, charge-discharge characteristics and rate capability of spinel LiNi0.5Mn1.5O4 and LiNi0.45Fe0.1Mn1.45O4 was made. The mechanism of doped Fe was deduced based on the measured oxygen deficiency amount from the TGA experiment. The doped Fe can maintain some oxygen deficiency which makes spinel LiNi0.5Mn1.5O4 contain some Mn3 , improving the rate capability. |
| |
| Keywords: | Lithium ion batteries Spinel LiNi0 5Mn1 5O4 Cathode materials Fe doping Charge-discharge characteristics |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《稀有金属材料与工程》浏览原始摘要信息 |
|
点击此处可从《稀有金属材料与工程》下载全文 |
