Polyethylene oxide/garnet-type Li6.4La3Zr1.4Nb0.6O12 composite electrolytes with improved electrochemical performance for solid state lithium rechargeable batteries

He, Kangqiang1,2; Chen, Chenglin1; Fan, Rong1; Liu, Chen1; Liao, Chengzhu3; Xu, Yi1,2; Tang, Jiaoning1; Li, Robert K. Y.2

2019-05-03

10.1016/j.compscitech.2019.02.030

COMPOSITES SCIENCE AND TECHNOLOGY   影响因子和分区

0266-3538

1879-1050

Next generation lithium batteries require new electrolytes with good safety, excellent ionic conductivity, high electrochemical stability and good cycling performance. Herein, we first report a solid composite polymer electrolyte comprises of Li6.4La3Zr1.4Nb0.6O12 fillers and polyethylene oxide matrix. The ionic conductivity of the solid composite electrolyte is significantly improved to 1.4 x 10(-3) S cm(-1) (60 degrees C) and the electrochemical window is enhanced to 5.2 V, respectively, by incorporation of Li6.4La3Zr1.4Nb0.6O12 powder at a weight ratio of 0.5:1 with respect to polyethylene oxide. The solid batteries employing the composite electrolytes are able to work at room temperature and have a capacity retention of 99% after cycle. The performance improvement is primarily due to the combined functions of each component in the composite: (i) the incorporation of fillers effectively decreases the crystallinity of PEO, providing more amorphous region for ion conduction; (ii) Li6.4La3Zr1.4Nb0.6O12 serves as a fast ion conductor in the composite and enhance the electrochemical stability; (iii) the polymer matrix forms intimate surface contact with fillers and electrodes, reducing the bulk and interfacial resistance. The composite polymer electrolyte in this work would be a competitive alternative for the next generation solid state lithium rechargeable batteries.

SCI ; EI

英语

其他

National Natural Science Foundation of China[21703096] ; National Natural Science Foundation of China[51778369]

Materials Science

Materials Science, Composites

WOS:000466455100004

ELSEVIER SCI LTD

20191106617352

Crystallinity ; Fillers ; Ionic conduction in solids ; Ionic conductivity ; Lanthanum compounds ; Lithium batteries ; Lithium compounds ; Niobium compounds ; Polyelectrolytes ; Polyethylene oxides ; Polyethylenes ; Polymer matrix composites ; Solid-State Batteries ; Zirconium compounds

Electricity: Basic Concepts and Phenomena:701.1 ; Primary Batteries:702.1.1 ; Chemical Agents and Basic Industrial Chemicals:803 ; Polymeric Materials:815.1 ; Organic Polymers:815.1.1

MATERIALS SCIENCE

Web of Science

1.Shenzhen Univ, Coll Mat Sci & Engn, Shenzhen 518055, Peoples R China
2.City Univ Hong Kong, Dept Mat Sci & Engn, Hong Kong, Peoples R China
3.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, PR, Peoples R China

He, Kangqiang,Chen, Chenglin,Fan, Rong,et al. Polyethylene oxide/garnet-type Li6.4La3Zr1.4Nb0.6O12 composite electrolytes with improved electrochemical performance for solid state lithium rechargeable batteries[J]. COMPOSITES SCIENCE AND TECHNOLOGY,2019,175:28-34.

He, Kangqiang.,Chen, Chenglin.,Fan, Rong.,Liu, Chen.,Liao, Chengzhu.,...&Li, Robert K. Y..(2019).Polyethylene oxide/garnet-type Li6.4La3Zr1.4Nb0.6O12 composite electrolytes with improved electrochemical performance for solid state lithium rechargeable batteries.COMPOSITES SCIENCE AND TECHNOLOGY,175,28-34.

He, Kangqiang,et al."Polyethylene oxide/garnet-type Li6.4La3Zr1.4Nb0.6O12 composite electrolytes with improved electrochemical performance for solid state lithium rechargeable batteries".COMPOSITES SCIENCE AND TECHNOLOGY 175(2019):28-34.