湿化学法合成富锂和掺铝尖晶石型锰酸锂及其电性能的改善

doi:10.3724/SP.J.1077.2012.12440

无机材料学报 ›› 2013, Vol. 28 ›› Issue (3): 336-340.DOI: 10.3724/SP.J.1077.2012.12440 CSTR: 32189.14.SP.J.1077.2012.12440

湿化学法合成富锂和掺铝尖晶石型锰酸锂及其电性能的改善

孔龙^1,2, 李运姣^1,2, 李维健², 李普良², 李华成²

(1. 中南大学冶金科学与工程学院, 长沙 410083; 2. 中信大锰矿业有限责任公司, 南宁 530028)

收稿日期:2012-07-18 修回日期:2012-08-15 出版日期:2013-03-20 网络出版日期:2013-02-20
作者简介:孔龙. E-mail: 670654388@qq.com
基金资助:
National Natural Science Foundation of China (50174058); Guangxi Zhuang Autonomous Region (Glorious Laurel Scholar Program, 2011)

Synthesis and Characterization of Li_1.035Mn_1.965O₄ and Al-doped Li_1.035Al_0.035Mn_1.930O₄ as Cathode Materials for Li-ion Batteries by a Wet-chemical Technique

KONG Long^1,2, LI Yun-Jiao^1,2, LI Wei-Jian², Li Pu-Liang², LI Hua-Cheng²

(1. School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China; 2. Citic Dameng Mining Industries Limited, Nanning 530028, China)

Received:2012-07-18 Revised:2012-08-15 Published:2013-03-20 Online:2013-02-20
About author:KONG Long (1988–), male, Master degree candidate. E-mail: 670654388@qq.com
Supported by:
National Natural Science Foundation of China (50174058); Guangxi Zhuang Autonomous Region (Glorious Laurel Scholar Program, 2011)

摘要/Abstract

摘要： 采用湿化学法–后续热处理技术, 合成了尖晶石型锰酸锂正极材料Li_1.035Mn_1.965O₄和Li_1.035Al_0.035Mn_1.930O₄。X射线衍射(XRD)结果表明这两种材料呈现出良好的尖晶石型结构。透射电子显微镜(TEM)表明Li_1.035Al_0.035Mn_1.930O₄材料具有很好的结晶态。充放电测试表明Li_1.035Al_0.035Mn_1.930O₄材料具有优良的循环性能和倍率性能: 以0.5C充放电, 经过100次循环后放电容量保持率为96.4%, 经过4C放电后仍然能够保持0.5C放电态容量的79.6%。

关键词: LiMn₂O₄, Al掺杂, 湿化学法, 电化学性能

Abstract: Spinel Li_1.035Mn_1.965O₄ and Al-doped Li_1.035Al_0.035Mn_1.930O₄ cathode materials were synthesized by a simple wet-chemical technique and heat treatment. The structure and the morphology of the two samples were investigated by powder X-ray diffraction (XRD), scanning electron microscope (SEM) and transmission electron microscope (TEM). The XRD patterns show that both of the two samples exhibit a well-defined spinel structure. The TEM result demonstrates that the Li_1.035Al_0.035Mn_1.930O₄ powder possesses a good crystalline state. The galvanostatic charge/discharge tests indicate that the Li_1.035Al_0.035Mn_1.930O₄ material delivers an excellent cycling ability and a nice rate capability, maintaining 96.4% of its initial capacity after 100 charge-discharge cycles at 0.5C and keeping 79.6% of the reversible capacity at 0.5C discharge rate when discharges at 4C rate.

Key words: LiMn₂O₄, Al substitution, wet-chemical technique, electrochemical performance

中图分类号:

TM912

孔龙, 李运姣, 李维健, 李普良, 李华成. 湿化学法合成富锂和掺铝尖晶石型锰酸锂及其电性能的改善[J]. 无机材料学报, 2013, 28(3): 336-340.

KONG Long, LI Yun-Jiao, LI Wei-Jian, Li Pu-Liang, LI Hua-Cheng. Synthesis and Characterization of Li_1.035Mn_1.965O₄ and Al-doped Li_1.035Al_0.035Mn_1.930O₄ as Cathode Materials for Li-ion Batteries by a Wet-chemical Technique[J]. Journal of Inorganic Materials, 2013, 28(3): 336-340.

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湿化学法合成富锂和掺铝尖晶石型锰酸锂及其电性能的改善

Synthesis and Characterization of Li_1.035Mn_1.965O₄ and Al-doped Li_1.035Al_0.035Mn_1.930O₄ as Cathode Materials for Li-ion Batteries by a Wet-chemical Technique

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湿化学法合成富锂和掺铝尖晶石型锰酸锂及其电性能的改善

Synthesis and Characterization of Li1.035Mn1.965O4 and Al-doped Li1.035Al0.035Mn1.930O4 as Cathode Materials for Li-ion Batteries by a Wet-chemical Technique

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Synthesis and Characterization of Li_1.035Mn_1.965O₄ and Al-doped Li_1.035Al_0.035Mn_1.930O₄ as Cathode Materials for Li-ion Batteries by a Wet-chemical Technique