Performance and Stability Improvement of Layered NCM Lithium-Ion Batteries at High Voltage by a Microporous Al2O3 Sol–Gel Coating

Yingqiang Wu, Mengliu Li, Wandi Wahyudi, Guan Sheng, Xiaohe Miao, Thomas D. Anthopoulos, Kuo-Wei Huang, Yangxing Li, Zhiping Lai

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

A simple and low-cost polymer-aided sol–gel method was developed to prepare γ-Al2O3 protective layers for LiNi0.6Co0.2Mn0.2O2 (NCM622) cathode materials. The selected polyvinyl alcohol polymer additive not only facilitates the formation of a uniform and thin γ-Al2O3 layer on the irregular and rough cathode particle surface to protect it from corrosion but also serves as a pore-forming agent to generate micropores in the film after sintering to allow fast transport of lithium ions, which guaranteed the excellent and stable battery performance at high working voltage. Detailed studies in the full battery mode showed that the leached corrosion species from the cathode had a more profound harmful effect to the graphite anode, which seemed to be the dominating factor that caused the battery performance decay.
Original languageEnglish (US)
Pages (from-to)13972-13980
Number of pages9
JournalACS Omega
Volume4
Issue number9
DOIs
StatePublished - Aug 19 2019

Fingerprint

Dive into the research topics of 'Performance and Stability Improvement of Layered NCM Lithium-Ion Batteries at High Voltage by a Microporous Al2O3 Sol–Gel Coating'. Together they form a unique fingerprint.

Cite this