锂离子电池PEO-LATP/LAGP陶瓷复合电解质膜的制备与性能表征

doi:10.3724/SP.J.1077.2012.00249

无机材料学报 ›› 2012, Vol. 27 ›› Issue (3): 249-252.DOI: 10.3724/SP.J.1077.2012.00249 CSTR: 32189.14.SP.J.1077.2012.00249

锂离子电池PEO-LATP/LAGP陶瓷复合电解质膜的制备与性能表征

黄乐之, 温兆银, 靳俊, 刘宇

(中国科学院上海硅酸盐研究所, 中国科学院能量转换材料重点实验室, 上海 200050)

收稿日期:2011-03-28 修回日期:2011-05-16 出版日期:2012-03-20 网络出版日期:2012-02-16
作者简介:黄乐之(1983-), 男, 博士研究生. E-mail: huanglezhi6800@hotmail.com
基金资助:
国家973计划项目(2007CB209700); 国家自然科学基金重点项目(50973127)

Preparation and Characterization of PEO-LATP/LAGP Ceramic Composite Electrolyte Membrane for Lithium Batteries

HUANG Le-Zhi, WEN Zhao-Yin, JIN Jun, LIU Yu

(CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China)

Received:2011-03-28 Revised:2011-05-16 Published:2012-03-20 Online:2012-02-16
About author:HUANG Le-Zhi. E-mail: huanglezhi6800@hotmail.com
Supported by:
973 Program (2007CB209700); National Natural Science Foundation of China(50973127)

摘要/Abstract

摘要： 设计并制备了PEO-LATP/LAGP陶瓷复合电解质. 使用NASICON结构的Li_1.4Al_0.4Ti_1.6(PO₄)₃ (LATP)或 Li_1.5Al_0.5Ge_1.5(PO₄)₃ (LAGP)作为陶瓷基体, 以PEO为粘结剂, 得到了均匀、厚度仅为20 μm的复合电解质膜. 通过电化学性能表征发现当w(LATP/LAGP):w(PEO)=7:3时, 复合电解质膜具有最高的室温电导率, 达到0.186 mS/cm (PEO-LATP)与0.111 mS/cm (PEO-LAGP). 通过充放电循环实验表明, Li/复合电解质/LiCo1/3Ni1/3Mn1/3O2电池的首次放电容量达170 mAh/g. 使用PEO-LATP复合电解质的电池在循环时有较大的容量衰减, 而使用PEO-LAGP复合电解质则循环性能有明显的改善, 在10次循环后仍保持在150 mAh/g.

关键词: 锂离子电池, 复合电解质, NASICON, PEO

Abstract: A PEO-LATP/LAGP composite electrolyte for lithium batteries was designed and prepared. Uniformly composite electrolyte membrane with thickness of 20 μm was obtained by assembling Li_1.4Al_0.4Ti_1.6(PO₄)₃ (LATP) or Li_1.5Al_0.5Ge_1.5(PO₄)₃ (LAGP) as ceramic substrate and PEO as binder. Highest room-temperature conductivities were achieved for the sample prepared with w(ceramics):w(PEO)=7:3. Electrochemical analysis showed that the conductivity reached 0.186 mS/cm for PEO-LATP and 0.111 mS/cm for PEO-LAGP. Cycling performances of 170 mAh/g was obtained for the first discharge capacity of the Li/composite electrolyte/LiCo_1/3Ni_1/3Mn_1/3O₂ cell. Sharp decrease of cycling capacity was observed for the cell using PEO-LATP membrane. The cycling performance of the PEO-LAGP based cell was greatly improved with 150 mAh/g remained after 10 cycles.

Key words: lithium battery, composite electrolyte, NASICON, PEO

中图分类号:

TQ152

黄乐之, 温兆银, 靳俊, 刘宇. 锂离子电池PEO-LATP/LAGP陶瓷复合电解质膜的制备与性能表征[J]. 无机材料学报, 2012, 27(3): 249-252.

HUANG Le-Zhi, WEN Zhao-Yin, JIN Jun, LIU Yu. Preparation and Characterization of PEO-LATP/LAGP Ceramic Composite Electrolyte Membrane for Lithium Batteries[J]. Journal of Inorganic Materials, 2012, 27(3): 249-252.

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锂离子电池PEO-LATP/LAGP陶瓷复合电解质膜的制备与性能表征

Preparation and Characterization of PEO-LATP/LAGP Ceramic Composite Electrolyte Membrane for Lithium Batteries

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