Premium
Advanced Nanoparticle Coatings for Stabilizing Layered Ni‐Rich Oxide Cathodes in Solid‐State Batteries
Author(s) -
Ma Yuan,
Teo Jun Hao,
Walther Felix,
Ma Yanjiao,
Zhang Ruizhuo,
Mazilkin Andrey,
Tang Yushu,
Goonetilleke Damian,
Janek Jürgen,
Bianchini Matteo,
Brezesinski Torsten
Publication year - 2022
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.202111829
Subject(s) - materials science , coating , electrolyte , nanoparticle , cathode , surface modification , oxide , chemical engineering , nanotechnology , anode , electrode , metallurgy , chemistry , engineering
Improving the interfacial stability between cathode active material (CAM) and solid electrolyte (SE) is a vital step toward the development of high‐performance solid‐state batteries (SSBs). One of the challenges plaguing this field is an economical and scalable approach to fabricate high‐quality protective coatings on the CAM particles. A new wet‐coating strategy based on preformed nanoparticles is presented herein. Nonagglomerated nanoparticles of the coating material ( ≤ 5 nm, exemplified for ZrO 2 ) are prepared by solvothermal synthesis, and after surface functionalization, applied to a layered Ni‐rich oxide CAM, LiNi 0.85 Co 0.10 Mn 0.05 O 2 (NCM85), producing a uniform surface layer with a unique structure. Remarkably, when used in pelletized SSBs with argyrodite Li 6 PS 5 Cl as SE, the coated NCM85 is found to exhibit superior lithium‐storage properties ( q dis ≈ 204 mAh g NCM85 −1 at 0.1 C rate and 45 ° C) and good rate capability. The key to the observed improvement lies in the homogeneity of coating, suppressing interfacial side reactions while simultaneously limiting gas evolution during operation. Moreover, this strategy is proven to have a similar effect in liquid electrolyte‐based Li‐ion batteries and can potentially be used for the application of other, even more favorable, nanoparticle coatings.