焙烧温度对锂离子电池正极材料Li<sub>2</sub>MnSiO<sub>4</sub>/C 电化学性能的影响

引用本文: 魏怡, 王利娟, 闫继, 沙鸥, 唐致远, 马莉. 焙烧温度对锂离子电池正极材料Li₂MnSiO₄/C 电化学性能的影响[J]. 物理化学学报, 2011, 27(11): 2587-2592. doi: 10.3866/PKU.WHXB20111124 shu

Citation: WEI Yi, WANG Li-Juan, YAN Ji, SHA Ou, TANG Zhi-Yuan, MA Li. Calcination Temperature Effects on the Electrochemical Performance of Li₂MnSiO₄/C Cathode Material for Lithium Ion Batteries[J]. Acta Physico-Chimica Sinica, 2011, 27(11): 2587-2592. doi: 10.3866/PKU.WHXB20111124 shu

焙烧温度对锂离子电池正极材料Li₂MnSiO₄/C 电化学性能的影响

魏怡 ^1, ,
王利娟 ^1, ,
闫继 ^1, ,
沙鸥 ^1, ,
唐致远 ^1, ,
马莉 ^2,

基金项目:
国家自然科学基金(20973124)资助项目 (20973124)

摘要: 采用液相法合成了Li₂MnSiO₄/C 复合正极材料, 并研究了不同焙烧温度对材料的结构、形貌和电化学性能的影响. 利用热重(TG)分析了材料前驱体的热行为, 确定了合成Li₂MnSiO₄/C 复合正极材料的焙烧温度范围为600-800°C. X射线衍射(XRD)测试结果表明, 不同温度下合成的样品材料均具有正交结构, 且空间群为Pmn2₁, 同时利用扫描电子显微镜(SEM)对所得样品材料的微观形貌及颗粒大小进行了表征. 将所得Li₂MnSiO₄/C 复合正极材料组装成扣式电池, 并在不同的电流密度下进行充放电测试, 结果表明: 700°C合成的样品材料电化学性能最佳, 具有较高的库仑效率及很好的循环稳定性.

关键词:

English

Calcination Temperature Effects on the Electrochemical Performance of Li₂MnSiO₄/C Cathode Material for Lithium Ion Batteries

WEI Yi ^1, ,
WANG Li-Juan ^1, ,
YAN Ji ^1, ,
SHA Ou ^1, ,
TANG Zhi-Yuan ^1, ,
MA Li ^2,

1.
1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, P. R. China;
2. McNair Technology Company, Limited, Dongguan 523800, Guangdong Province, P. R. China
Received Date: 04 July 2011
Available Online: 27 October 2011
Fund Project:
国家自然科学基金(20973124)资助项目

Abstract: As a new potential cathode material for lithium ion batteries, Li₂MnSiO₄/C was synthesized by a solution method. The thermal behavior of the precursor for Li₂MnSiO₄/C was measured by thermogravimetric (TG) analysis and the range of calcination temperatures from 600 to 800°C was determined. X-ray powder diffraction (XRD) patterns indicated that all the Li₂MnSiO₄/C samples crystallized in an orthorhombic structure with space group Pmn2₁. The morphology and particle size of the samples were also characterized by scanning electron microscopy (SEM). The effects of calcination temperature on the electrochemical performance of Li₂MnSiO₄/C were studied using galvanostatic charge-discharge measurements at various current densities. The results showed that the sample prepared at 700°C exhibited a much higher coulombic efficiency and better cyclic performance than the other samples.

Key words:

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沈阳化工大学材料科学与工程学院沈阳 110142

焙烧温度对锂离子电池正极材料Li₂MnSiO₄/C 电化学性能的影响

English

Calcination Temperature Effects on the Electrochemical Performance of Li₂MnSiO₄/C Cathode Material for Lithium Ion Batteries

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南：你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

焙烧温度对锂离子电池正极材料Li2MnSiO4/C 电化学性能的影响

English

Calcination Temperature Effects on the Electrochemical Performance of Li2MnSiO4/C Cathode Material for Lithium Ion Batteries

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

焙烧温度对锂离子电池正极材料Li₂MnSiO₄/C 电化学性能的影响

Calcination Temperature Effects on the Electrochemical Performance of Li₂MnSiO₄/C Cathode Material for Lithium Ion Batteries

CCS Chemistry：颜徐州、鲍哲南：你的皮肤可能是一片SPMs