Rapid Processing of Uniform, Thin, Robust, and Large‐Area Garnet Solid Electrolyte by Atmospheric Plasma Spraying

Author:

Wu Yulong1,Wang Kuangyu1,Liu Kai2,Long Yuanzheng1,Yang Cheng3,Zhang Haitian4,Pan Wei1,Si Wenjie1,Wu Hui1ORCID

Affiliation:

1. State Key Lab of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing 100084 P. R. China

2. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources School of New Energy North China Electric Power University Beijing 102206 P. R. China

3. Center for Advanced Mechanics and Materials Applied Mechanics Laboratory Department of Engineering Mechanics Tsinghua University Beijing 100084 P. R. China

4. Institute of Nuclear and New Energy Technology Tsinghua University Beijing 100084 P. R. China

Abstract

AbstractAll‐solid‐state batteries (ASSBs) are rapidly moving toward commercialization as a promising high‐performance energy storage device for portable electronics and electric vehicles. One of the most challenging problems hindering the industrialization of ASSBs is the lack of technologies for cost‐effective and large‐scale manufacturing of high‐quality solid‐state electrolytes (SSEs) with about the same thickness as the polymer separators in conventional lithium‐ion batteries. Herein, atmospheric plasma spraying (APS) is adopted as a practical route to process large‐scale, uniform, and thin SSEs to conduct Li‐ions and further to manufacture ASSBs. Garnet‐type Li7La3Zr2O12 (LLZO) films with thicknesses ranging from 30 to 300 µm are successfully manufactured with direct APS technique followed with a post annealing treatment. The electrolyte reaches a high Li‐ion conductivity of 3.82 × 10−5 S cm−1 at room temperature (25 °C). Additionally, the LLZO film with a thickness of 300 µm shows a flexural strength of 157 MPa. Li/LLZO/Li and Li/LLZO/LiFePO4 cells are assembled with the films, both showing stable cycling performance. The APS method shows scalability in solid‐state electrolyte film production, and most importantly, such a process is highly compatible with the current battery industry.

Funder

National Natural Science Foundation of China

Publisher

Wiley

Subject

General Materials Science,Renewable Energy, Sustainability and the Environment

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