Liao Y.-KTong ZFang C.-CLiao S.-CChen J.-MRU-SHI LIUHu S.-F.2022-04-252022-04-25202119448244https://www.scopus.com/inward/record.uri?eid=2-s2.0-85119962048&doi=10.1021%2facsami.1c16922&partnerID=40&md5=a7fa18a07b2d1ccc25e6d602d5a99ad7https://scholars.lib.ntu.edu.tw/handle/123456789/606932All-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. ? 2021 American Chemical Society.Li-Pt alloyLi6.75La3Zr1.75Ta0.25O12lithiumphilicsolid-state Li-ion batteriesAnodesGarnetsIonsLithium alloysLithium compoundsLithium-ion batteriesPlatinum alloysPoint contactsSolid electrolytesAll-solid stateHigher energy densityInterfacial resistancesLi metalLi6.75la3zr1.75ta0.25O12LithiumphilicMetal anodesSolid-state electrolyteSolid-state li-ion batteryUltra-thinBinary alloys[SDGs]SDG7journal article10.1021/acsami.1c16922347841882-s2.0-85119962048