Fabrication of thin film LiCo0.5Ni0.5O2 cathode for Li rechargeable microbattery

Seung Joo Lee; Jong Ki Lee; Dae Woo Kim; Hong Koo Baik; Sung Man Lee

doi:10.1149/1.1837230

Fabrication of thin film LiCo_0.5Ni_0.5O₂ cathode for Li rechargeable microbattery

Seung Joo Lee, Jong Ki Lee, Dae Woo Kim, Hong Koo Baik, Sung Man Lee

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

63 Citations (Scopus)

Abstract

LiCo_0.5Ni_0.5O₂ thin film cathodes were fabricated by electron beam evaporation and postannealing in oxygen atmosphere. As-deposited film showed almost amorphous characteristics, but included some crystalline phases. Hexagonal phase of LiCo_0.5Ni_0.5O₂ was formed in the films annealed between 500 and 700°C. The crystallinity of the film was improved as the annealing temperature increased to 700°C. Open-circuit voltage (OCV) curves were measured. Especially, the film annealed at 700°C for 10 min showed a similar OCV curve to that of bulk powder cathode. It can be suggested that LiCo_0.5Ni_0.5O₂ thin film is suitable for the cathode of Li rechargeable microbattery.

Original language	English
Pages (from-to)	L268-L270
Journal	Journal of the Electrochemical Society
Volume	143
Issue number	11
DOIs	https://doi.org/10.1149/1.1837230
Publication status	Published - 1996 Nov

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Renewable Energy, Sustainability and the Environment
Surfaces, Coatings and Films
Electrochemistry
Materials Chemistry

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title = "Fabrication of thin film LiCo0.5Ni0.5O2 cathode for Li rechargeable microbattery",

abstract = "LiCo0.5Ni0.5O2 thin film cathodes were fabricated by electron beam evaporation and postannealing in oxygen atmosphere. As-deposited film showed almost amorphous characteristics, but included some crystalline phases. Hexagonal phase of LiCo0.5Ni0.5O2 was formed in the films annealed between 500 and 700°C. The crystallinity of the film was improved as the annealing temperature increased to 700°C. Open-circuit voltage (OCV) curves were measured. Especially, the film annealed at 700°C for 10 min showed a similar OCV curve to that of bulk powder cathode. It can be suggested that LiCo0.5Ni0.5O2 thin film is suitable for the cathode of Li rechargeable microbattery.",

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AU - Lee, Seung Joo

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AU - Baik, Hong Koo

AU - Lee, Sung Man

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AB - LiCo0.5Ni0.5O2 thin film cathodes were fabricated by electron beam evaporation and postannealing in oxygen atmosphere. As-deposited film showed almost amorphous characteristics, but included some crystalline phases. Hexagonal phase of LiCo0.5Ni0.5O2 was formed in the films annealed between 500 and 700°C. The crystallinity of the film was improved as the annealing temperature increased to 700°C. Open-circuit voltage (OCV) curves were measured. Especially, the film annealed at 700°C for 10 min showed a similar OCV curve to that of bulk powder cathode. It can be suggested that LiCo0.5Ni0.5O2 thin film is suitable for the cathode of Li rechargeable microbattery.

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