LiMn2-2xLixNixO4(0≤x≤0.1)阴极材料的结构和电化学性能

无机材料学报, 2005, 20(5): 1120-1126. doi: 10.3321/j.issn:1000-324X.2005.05.017

LiMn2-2xLixNixO4(0≤x≤0.1)阴极材料的结构和电化学性能

涂健 ^1, , 曹高劭 ^2, , 庄大高 ^3, , 赵新兵 ^4,

1.浙江大学材料科学与工程系,杭州,310027

2.浙江大学材料科学与工程系,杭州,310027

3.浙江大学材料科学与工程系,杭州,310027

4.浙江大学材料科学与工程系,杭州,310027

基金项目: 国家自然科学基金(50201014)

关键词：锂离子电池 , 阴极材料 , 双掺杂 , 结构分析

Structural and Electrochemical Characterization of LiMn2-2xLixNixO4 (0≤x≤0.1) Cathode Materials

采用高温固相法,合成了LiMn2-2xLixNixO4(x=0.03、0.05、0.075、0.100)试样.用X射线衍射(XRD)和场发射扫描电镜(FESEM)对试样的晶体结构和形貌进行了表征.从试样的充放电性能,室温和高温下(55℃)循环性能等方面,并结合X射线吸收精细结构(X-rayabsorption fine structure,XAFS)所得到的试样中MnO6八面体中键长的变化分析了锂镍协同掺杂对尖晶石结构的稳定作用.实验表明:与尖晶石LiMn2O4相比,LiMn2-2xLixNixO4试样在室温和55℃时具有良好的容量保持能力,是由于Li,M协同掺杂对试样的结构起了稳定作用.

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LiMn2-2xLixNixO4(0≤x≤0.1)阴极材料的结构和电化学性能

Structural and Electrochemical Characterization of LiMn2-2xLixNixO4 (0≤x≤0.1) Cathode Materials

参考文献