A Polymer-in-Salt Electrolyte Enables Room Temperature Lithium Metal Batteries

Xie, Jingbing1; Xu, Hongli1; Wang, Qingrong1; Ke, Ruohong1; Han, Bing1; Chang, Jian1; Wang, Jun1; Deng, Yonghong1,2

2022-04-01

10.1149/1945-7111/ac6830

JOURNAL OF THE ELECTROCHEMICAL SOCIETY   影响因子和分区

0013-4651

1945-7111

The lithium metal battery with solid-state polymer electrolyte (SPE) is a promising candidate for solid-state batteries with high safety and high energy density. However, the low room temperature ionic conductivity and poor electrolyte/electrode interfacial stability of the SPEs seriously hinder the practical application. Herein, we adopt a polymer-in-salt electrolyte (PISE) strategy on the comb-like polycaprolactone (PCL) to circumvent the low ionic conductivity and poor interfacial stability of the conventional SPE, thus enabling the full function of room temperature lithium metal batteries. The all-solid-state PISE exhibits a high ionic conductivity of 3.9 x 10(-4 )S cm(-1) at 30 degrees C, a superior lithium-ion transference number of 0.61 and an improved oxidative stability of similar to 4.8 V vs Li/Li+. Due to the ultra-stable interface generated by the superconcentrated lithium salt, the all-solid-state LiFePO4 divide divide Li cells exhibit prominent high cycling stability, with high capacity retention (92%) after 300 cycles at ambient temperature. The full function of the ambient temperature PISE offers a promising pathway towards high energy density and high safety room temperature LMBs.

SCI ; EI

英语

第一 ; 通讯

Key-Area Research and Development Program of Guangdong Province["2019B090908001","2020B090919001"] ; Guangdong Basic and Applied Basic Research Foundation["2021A1515010206","2019A1515111107"] ; Shenzhen Science and Technology Program[RCBS20200714114819216]

Electrochemistry ; Materials Science

Electrochemistry ; Materials Science, Coatings & Films

WOS:000788774700001

ELECTROCHEMICAL SOC INC

20222112129107

Interface states ; Ionic conduction in solids ; Lithium ; Lithium compounds ; Lithium-ion batteries ; Polyelectrolytes ; Solid electrolytes ; Solid state devices ; Solid-State Batteries ; Stability ; Temperature

Lithium and Alloys:542.4 ; Alkali Metals:549.1 ; Thermodynamics:641.1 ; Electricity: Basic Concepts and Phenomena:701.1 ; Secondary Batteries:702.1.2 ; Semiconductor Devices and Integrated Circuits:714.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Organic Polymers:815.1.1 ; Polymer Products:817.1 ; Classical Physics; Quantum Theory; Relativity:931 ; High Energy Physics; Nuclear Physics; Plasma Physics:932

CHEMISTRY

Web of Science

1.Southern Univ Sci & Technol SUSTech, Sch Innovat & Entrepreneurship, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
2.Southern Univ Sci & Technol, Key Univ Lab Highly Efficient Utilizat Solar Ener, Shenzhen 518055, Peoples R China

Xie, Jingbing,Xu, Hongli,Wang, Qingrong,et al. A Polymer-in-Salt Electrolyte Enables Room Temperature Lithium Metal Batteries[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY,2022,169(4).

Xie, Jingbing.,Xu, Hongli.,Wang, Qingrong.,Ke, Ruohong.,Han, Bing.,...&Deng, Yonghong.(2022).A Polymer-in-Salt Electrolyte Enables Room Temperature Lithium Metal Batteries.JOURNAL OF THE ELECTROCHEMICAL SOCIETY,169(4).

Xie, Jingbing,et al."A Polymer-in-Salt Electrolyte Enables Room Temperature Lithium Metal Batteries".JOURNAL OF THE ELECTROCHEMICAL SOCIETY 169.4(2022).