Dual-salt effect on polyethylene oxide/Li6.4La3Zr1.4Ta0.6O12 composite electrolyte for solid-state lithium metal batteries with superior electrochemical performance

Zhu, Fangyan1; Cheng, Samson Ho-Sum1; Xu, Yi1; Liao, Wenchao1; He, Kangqiang3; Chen, Dazhu1; Liao, Chengzhu2; Cheng, Xin2; Tang, Jiaoning1; Li, Robert K. Y.3; Liu, Chen1

2021-07-07

10.1016/j.compscitech.2021.108837

COMPOSITES SCIENCE AND TECHNOLOGY   影响因子和分区

0266-3538

1879-1050

The polymer composite electrolytes, especially garnet ceramic Li6.4La3Zr1.4Ta0.6O12 reinforced polyethylene oxide (PEO), are expected to be the most promising substitute for commercial liquid electrolytes in lithium metal batteries due to their good safety, easy-manufacturing and flexibility. However, their insufficient ionic conductivity and instability towards reductive Li anode at room temperature are the long-standing issues. In this work, a dual-salt solid composite electrolyte with superior ambient-temperature electrochemical performance is designed by regulating polyethylene oxide/lithium perchlorate/Li6.4La3Zr1.4Ta0.6O12 composite electrolyte with additive lithium tetrafluoroborate (LL@PL). The stable solid electrolyte interphase with LiF, B-F, and Li-B-O formed on lithium metal effectively induces even Li deposition and strengthens the compatibility of electrolyte/ Li anode interface. The combined action of each composition in the electrolyte guarantees the efficient ion immigration kinetic and suppresses the lithium dendrite growth of solid-state batteries. The Li symmetric cells using LL@PL-0.1 can steadily cycle for 1700 h without short circuit. An 80% capacity retention is achieved for LiFePO4| LL@PL-0.1 |Li cell after 350 cycles at 25 degrees C. The electrochemical stability of the composite electrolyte is extended to 4.6 V and the assembled cell works well with LiNi0.8Co0.1Mn0.1O2 cathode. This study proposed a promising polymer composite electrolyte for solid-state lithium metal batteries with superior performance.

Composite electrolyte Dual-salt Polyethylene oxide Solid-state lithium metal battery

SCI ; EI

英语

其他

National Natural Science Foundation of China[21905180,21703096,51778369] ; Guangdong Provincial Key Laboratory of Energy Materials for Electric Power[2018B030322001]

Materials Science

Materials Science, Composites

WOS:000655631700003

ELSEVIER SCI LTD

20211910320662

Anodes ; Cobalt compounds ; Composite materials ; Inorganic compounds ; Ionic conduction in solids ; Lanthanum compounds ; Lithium ; Lithium compounds ; Lithium-ion batteries ; Manganese compounds ; Nickel compounds ; Polyelectrolytes ; Polyethylenes ; Solid electrolytes ; Solid state devices ; Solid-State Batteries ; Tantalum compounds ; Zirconium compounds

Lithium and Alloys:542.4 ; Alkali Metals:549.1 ; Electricity: Basic Concepts and Phenomena:701.1 ; Secondary Batteries:702.1.2 ; Electron Tubes:714.1 ; Semiconductor Devices and Integrated Circuits:714.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Inorganic Compounds:804.2 ; Organic Polymers:815.1.1 ; Polymer Products:817.1 ; Materials Science:951

MATERIALS SCIENCE

Web of Science

1.Shenzhen Univ, Coll Mat Sci & Engn, Guangdong Res Ctr Interfacial Engn Funct Mat, Shenzhen Key Lab Polymer Sci & Technol, Shenzhen 518060, Peoples R China
2.Southern Univ Sci & Technol, Shenzhen Key Lab Solid State Batteries, Dept Mat Sci & Engn, Guangdong Prov Key Lab Energy Mat Elect Power, Shenzhen 518055, Peoples R China
3.City Univ Hong Kong, Dept Mat Sci & Engn, Hong Kong, Peoples R China

Zhu, Fangyan,Cheng, Samson Ho-Sum,Xu, Yi,et al. Dual-salt effect on polyethylene oxide/Li6.4La3Zr1.4Ta0.6O12 composite electrolyte for solid-state lithium metal batteries with superior electrochemical performance[J]. COMPOSITES SCIENCE AND TECHNOLOGY,2021,210.

Zhu, Fangyan.,Cheng, Samson Ho-Sum.,Xu, Yi.,Liao, Wenchao.,He, Kangqiang.,...&Liu, Chen.(2021).Dual-salt effect on polyethylene oxide/Li6.4La3Zr1.4Ta0.6O12 composite electrolyte for solid-state lithium metal batteries with superior electrochemical performance.COMPOSITES SCIENCE AND TECHNOLOGY,210.

Zhu, Fangyan,et al."Dual-salt effect on polyethylene oxide/Li6.4La3Zr1.4Ta0.6O12 composite electrolyte for solid-state lithium metal batteries with superior electrochemical performance".COMPOSITES SCIENCE AND TECHNOLOGY 210(2021).