Surface coating of a LiNixCoyAl1−x−yO2 (x > 0.85) cathode with Li3PO4 for applying a water-based hybrid polymer binder during Li-ion battery preparation. Issue 59 (18th November 2021)

• Record Type: Journal Article
• Authors: Watanabe, Tatsuya; Yokokawa, Tamae; Yamada, Mitsuru; Kurosumi, Shoudai; Ugawa, Shinsaku; Lee, Hojin; Irii, Yuta; Maki, Fumihiko; Gunji, Takao; Wu, Jianfei; Matsumoto, Futoshi
• Is Part Of: RSC advances. Volume 11:Issue 59(2021)
• Page Start: 37150
• Page End: 37161
• Publication Date: 2021-11-18
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d1ra06409f
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : To produce water-stable Ni-rich lithium nickel cobalt aluminum oxides, the formation of trilithium phosphate coated layers on the NCA surfaces was attempted through the use of a surface reaction in a mixture of ethanol and water and a post-heat treatment at 350 and 400 °C. Abstract : To produce water-stable Ni-rich lithium nickel cobalt aluminum oxides (LiNi x Co y Al1− x − y O2, x > 0.85, NCAs), the formation of trilithium phosphate (Li3 PO4 )-coated layers on the NCA surfaces was attempted through the use of a surface reaction in a mixture of ethanol and water and a post-heat treatment at 350 and 400 °C. Based on the results of X-ray photoelectron spectroscopy (XPS), the coated layers consisted of nickel phosphate (Ni3 (PO4 )2 ) and Li3 PO4 . The coated NCA surface could have sufficient water stability to maintain the cathode performance in a water slurry for 1 day. In addition, the coated layers formed on the NCA surfaces did not block Li + -ion transfer through the Ni3 (PO4 )2 /Li3 PO4 -coating layers and enhanced the high-rate discharge performance.