journal article·2023-05-03Open access

LiAlO2-Modified Li Negative Electrode with Li10GeP2S12 Electrolytes for Stable All-Solid-State Lithium Batteries

Xinshuang Chang, Wei Weng, Mengqi Li, Ming Wu, George Z. Chen, Kam Loon Fow, Xiayin Yao

ACS Applied Materials & Interfaces· Volume 15· Issue 17

Abstract

Lithium (Li) metal has an ultrahigh specific capacity in theory with an extremely negative potential (versus hydrogen), receiving extensive attention as a negative electrode material in batteries. However, the formation of Li dendrites and unstable interfaces due to the direct Li metal reaction with solid sulfide-based electrolytes hinders the application of lithium metal in all-solid-state batteries. In this work, we report the successful fabrication of a LiAlO 2 interfacial layer on a Li/Li 10 GeP 2 S 12 interface through magnetic sputtering. As LiAlO 2 can be a good Li + ion conductor but an electronic insulator, the LiAlO 2 interface layer can effectively suppress Li dendrite growth and the severe interface reaction between Li and Li 10 GeP 2 S 12 . The Li@LiAlO 2 200 nm/Li 10 GeP 2 S 12 /Li@LiAlO 2 200 nm symmetric cell can remain stable for 3000 h at 0.1 mA cm –2 under 0.1 mAh cm –2 . Moreover, unlike the rapid capacity decay of a cell with a pristine lithium negative electrode, the Li@LiAlO 2 200 nm/Li 10 GeP 2 S 12 /LiCoO 2 @LiNbO 3 cell delivers a reversible capacity of 118 mAh g –1 and a high energy efficiency of 96.6% after 50 cycles. Even at 1.0 C, the cell with the Li@LiAlO 2 200 nm electrode can retain 95% of its initial capacity after 800 cycles.
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Research context

OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Advanced Battery Technologies Research

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Affiliations

Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang 315201, P.R. China

Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham Ningbo China, Ningbo, Zhejiang 315100, P.R. China

Department of Chemical and Environmental Engineering, Faculty of Engineering, University of Nottingham, University Park, Nottingham NG7 2RD, U.K.

Key Laboratory of Carbonaceous Wastes Processing and Process Intensification of Zhejiang Province, University of Nottingham Ningbo China, Ningbo, Zhejiang 315100, P.R. China

Nottingham Ningbo China Beacons of Excellence Research and Innovation Institute, University of Nottingham Ningbo China, Ningbo, Zhejiang 315201, China

Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, P. R. China

Funding

Natural Science Foundation of Ningbo · Ministry of Science and Technology of the People's Republic of China · Science and Technology Department of Zhejiang Province · Youth Innovation Promotion Association of the Chinese Academy of Sciences · National Natural Science Foundation of China · Jiangsu Provincial S&T Innovation Special Programme for carbon peak and carbon neutrality · Ningbo Municipal Key Laboratory on Clean Energy Conversion Technologies

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