DataVXAdvanced Functional MaterialsPaper
journal article·2022-10Open access

Origin of Lithiophilicity of Lithium Garnets: Compositing or Cleaning?

Hongpeng Zheng, Guoyao Li, Runxin Ouyang, Yao Han, Hong Zhu, Yongmin Wu, Xiao Huang, Hezhou Liu, Huanan Duan

Advanced Functional Materials· Volume 32· Issue 41
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Source abstract

Abstract

Abstract Garnet‐type Li6.5La3Zr1.5Ta0.5O12 (LLZTO), a promising solid‐state electrolyte, is reported to exhibit lithiophobicity. Herein, it is demonstrated that the origin of the lithiophobicity is closely related to the surface compositions of both the lithium and LLZTO. Surface impurities with high melting points such as Li2O, Li2CO3, LiOH, or LiF inhibit the wettability between lithium metal and LLZTO, and the widely adopted compositing strategy may improve the wettability by merely breaking the surface impurity layers. A simple but effective “polishing‐and‐spreading” strategy is proposed to remove the surface impurities and obtain clean Li/LLZTO interfaces. Thus, a tight and continuous Li/LLZTO interface with an interfacial resistance of 17.5 Ω cm2 is achieved, which leads to stable cycling of the symmetric Li cells and a critical current density up to 2.8 mA cm–2. This work provides a new perspective to understand the lithiophilicity of garnet‐type electrolytes and contributes to designing robust Li/garnet interfaces.
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Research context

Energy storage

OpenAlex topics: Advanced Battery Materials and Technologies · Advancements in Battery Materials · Perovskite Materials and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory of Metal Matrix Composites School of Materials Science and Engineering Shanghai Jiao Tong University Shanghai 200240 P. R. China

University of Michigan‐Shanghai Jiao Tong University Joint Institute Shanghai Jiao Tong University Shanghai 200240 China

Instrumental Analysis Center of SJTU Shanghai Jiao Tong University Shanghai 200240 P. R. China

State Key Laboratory of Space Power Technology Shanghai Institute of Space Power‐Sources Shanghai 200245 P. R. China

SZU‐NUS Collaborative Innovation Center for Optoelectronic Science & Technology International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education Institute of Microscale Optoelectronics Shenzhen University Shenzhen 518060 P. R. China

Funding

National Natural Science Foundation of China

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