Stabilizing the Cathode/Electrolyte Interface Using a Dry-Processed Lithium Titanate Coating for All-Solid-State Batteries

• DOI: 10.1021/acs.chemmater.1c01123
• Publication Date: 2021-08-20T18:30:35Z
• Authors: Rajendra S. Negi; Philip Minnmann; Ruijun Pan; Shamail Ahmed; Marcel J. Herzog; Kerstin Volz; Ryo Takata; Franz Schmidt; Jürgen Janek; Matthias T. Elm
• Keywords: Thiophosphate

Considering the high theoretical energy density and improved safety, thiophosphate-based all-solid-state batteries (ASSBs) have become one of most promising candidates for next-generation storage systems. However, intrinsic electrochemical instability solid electrolytes in contact with oxide-based cathodes results rapid capacity fading has driven need protective cathode coatings. In this work, first time, a fumed lithium titanate (LTO) powder-based coating been applied to Ni-rich active material (CAM) using newly developed dry-coating process. The LTO tested ASSBs. It exhibits significantly C-rate performance along superior long-term cycling stability. is attributed reduced interfacial resistance between coated electrolyte as deduced from in-depth impedance spectroscopy analysis. These open up new, facile route fabricate effective CAM coatings enable long-life This nondestructive process no post-heat-treatment approach expected simplify wide range materials, resulting much cathode/electrolyte stability