Improvement of the Electrochemical Performance of LiNi0.8Co0.1Mn0.1O2 via Atomic Layer Deposition of Lithium-Rich Zirconium Phosphate Coatings

• DOI: 10.1021/acsami.1c16373
• Publication Date: 2021-12-14T16:21:37Z
• Authors: Sri Harsha Akella; Sarah Taragin; Yang Wang; Hagit Aviv; Alexander C. Kozen; Melina Zysler; Longlong Wang; Daniel Sharon; Sang Bok Lee; Malachi Noked
• Keywords: 02 engineering and technology; 0210 nano-technology

Owing to its high energy density, LiNi0.8Co0.1Mn0.1O2 (NMC811) is a cathode material of prime interest for electric vehicle battery manufacturers. However, NMC811 suffers from several irreversible parasitic reactions that lead severe capacity fading and impedance buildup during prolonged cycling. Thin surface protection films coated on the mitigate degradative chemomechanical at electrode-electrolyte interphase, which helps increase cycling stability. these coatings may impede diffusion lithium ions, therefore, limit performance C-rate. Herein, we report synthesis zirconium phosphate (ZrxPOy) lithium-containing (LixZryPOz) as artificial cathode-electrolyte interphases (ACEIs) using atomic layer deposition technique. Upon cycling, ZrxPOy- LixZryPOz-coated samples show 36.4 49.4% enhanced retention, respectively, compared with uncoated NMC811. Moreover, addition Li ions LixZryPOz coating enhances rate initial discharge in comparison ZrxPOy-coated samples. Using online electrochemical mass spectroscopy, ACEIs largely suppress side observed sample. Our study demonstrates providing extra ACEI improves stability without sacrificing capability performance.