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Surface coating of a LiNi x Co y Al1-x-y O2 (x > 0.85) cathode with Li3PO4 for applying a water-based hybrid polymer binder during Li-ion battery preparation.

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 (Li3PO4)-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 Li3PO4. 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/Li3PO4-coating layers and enhanced the high-rate discharge performance.

SUBMITTER: Watanabe T 

PROVIDER: S-EPMC9043788 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature

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Surface coating of a LiNi <sub><i>x</i></sub> Co <sub><i>y</i></sub> Al<sub>1-<i>x</i>-<i>y</i></sub> O<sub>2</sub> (<i>x</i> > 0.85) cathode with Li<sub>3</sub>PO<sub>4</sub> for applying a water-based hybrid polymer binder during Li-ion battery preparation.

Watanabe Tatsuya T   Yokokawa Tamae T   Yamada Mitsuru M   Kurosumi Shoudai S   Ugawa Shinsaku S   Lee Hojin H   Irii Yuta Y   Maki Fumihiko F   Gunji Takao T   Wu Jianfei J   Matsumoto Futoshi F  

RSC advances 20211118 59

To produce water-stable Ni-rich lithium nickel cobalt aluminum oxides (LiNi <sub><i>x</i></sub> Co <sub><i>y</i></sub> Al<sub>1-<i>x</i>-<i>y</i></sub> O<sub>2</sub>, <i>x</i> > 0.85, NCAs), the formation of trilithium phosphate (Li<sub>3</sub>PO<sub>4</sub>)-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  ...[more]

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