Extensively Reducing Interfacial Resistance by the Ultrathin Pt Layer between the Garnet-Type Solid-State Electrolyte and Li-Metal Anode

Yu Kai Liao, Zizheng Tong, Chia Chen Fang, Shih Chieh Liao, Jin Ming Chen, Ru Shi Liu, Shu Fen Hu*

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

1 引文 斯高帕斯(Scopus)

摘要

All-solid-state Li-ion batteries (ASSLIBs), also known as next-generation batteries, have attracted much attention due to their high energy density and safety. The best advantage of ASSLIBs is the Li-metal anodes that could be used without safety issues. In this study, a highly conductive garnet solid electrolyte (Li6.75La3Zr1.75Ta0.25O12, LLZTO) was used in the ASSLIB, and a Pt film was used to modify the surface of LLZTO to prove the solution of the Li-metal anode for LLZTO. Li-Pt alloy was synthesized to improve the wettability and contact of the interface. The interfacial resistance was reduced by 21 times, at only 9 ω cm2. The symmetric cell could stably cycle over 3500 h at a current density of 0.1 mA cm-2. The full cell of Li|Li-Pt|LLZTO|LiFePO4 and Li|Li-Pt|LLZTO|LiMn0.8Fe0.2PO4 achieved high stability in terms of battery performance. Point-to-point contact transformed into homogeneous surface contact made the Li-ion flux faster and more stable. This surface modification method could provide researchers with a new choice for fixing interface issues and promoting the application of high-performance ASSLIBs in the future.

原文英語
頁(從 - 到)56181-56190
頁數10
期刊ACS Applied Materials and Interfaces
13
發行號47
DOIs
出版狀態已發佈 - 2021 12月 1

ASJC Scopus subject areas

  • 材料科學(全部)

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