TiO 2 -coated LiCoO 2 electrodes fabricated by a sputtering deposition method for lithium-ion batteries with enhanced electrochemical performance
- Authors
- Moon, S.-H.; Kim, M.-C.; Kim, E.-S.; Shin, Y.-K.; Lee, J.-E.; Choi, S.; Park, K.-W.
- Issue Date
- Mar-2019
- Publisher
- Royal Society of Chemistry
- Citation
- RSC Advances, v.9, no.14, pp.7903 - 7907
- Journal Title
- RSC Advances
- Volume
- 9
- Number
- 14
- Start Page
- 7903
- End Page
- 7907
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/32245
- DOI
- 10.1039/c8ra10451d
- ISSN
- 2046-2069
- Abstract
- We fabricated lithium cobalt oxide (LiCoO2, LCO) electrodes in the absence and presence of TiO2 layers as cathodes for lithium-ion batteries (LIBs) using a sputtering deposition method under an Ar atmosphere. In particular, TiO2 coating layers on sputtered LCO electrodes were directly deposited in a layer-by-layer form with varying TiO2 sputtering times from 60 to 120 s. These sputtered electrodes were heated at 600 °C in an air atmosphere for 3 h. The thicknesses of TiO2 layers in TiO2-coated LCO electrodes were controlled from ∼2 to ∼10 nm. These TiO2-coated LCO electrodes exhibited superior electrochemical performance, i.e. high capacities (93–107 mA h g−1@0.5C), improved retention of >60% after 100 cycles, and high-rate cycling properties (64 mA h g−1@1C after 100 cycles). Such an improved performance of TiO2-coated LCO electrodes was found to be attributed to relieved volumetric expansion of LCO and protection of LCO electrodes against HF generated during cycling.
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Collections - College of Engineering > Department of Chemical Engineering > 1. Journal Articles
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