TY - JOUR
T1 - Performance and Stability Improvement of Layered NCM Lithium-Ion Batteries at High Voltage by a Microporous Al2O3 Sol–Gel Coating
AU - Wu, Yingqiang
AU - Li, Mengliu
AU - Wahyudi, Wandi
AU - Sheng, Guan
AU - Miao, Xiaohe
AU - Anthopoulos, Thomas D.
AU - Huang, Kuo-Wei
AU - Li, Yangxing
AU - Lai, Zhiping
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): BAS/1/1375
Acknowledgements: This work was supported by Huawei grant RGC/3/3513 and KAUST Baseline BAS/1/1375
PY - 2019/8/19
Y1 - 2019/8/19
N2 - 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.
AB - 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.
UR - http://hdl.handle.net/10754/656610
UR - http://pubs.acs.org/doi/10.1021/acsomega.9b01706
UR - http://www.scopus.com/inward/record.url?scp=85071925465&partnerID=8YFLogxK
U2 - 10.1021/acsomega.9b01706
DO - 10.1021/acsomega.9b01706
M3 - Article
C2 - 31497715
SN - 2470-1343
VL - 4
SP - 13972
EP - 13980
JO - ACS Omega
JF - ACS Omega
IS - 9
ER -