Energy-Density Improvement in Li-Ion Rechargeable Batteries Based on LiCoO2 + LiV3O8 and Graphite plus Li-Metal Hybrid Electrodes
- Authors
- Bae, Ki Yoon; Cho, Sung Ho; Kim, Byung Hyuk; Son, Byung Dae; Yoon, Woo Young
- Issue Date
- 2-6월-2019
- Publisher
- MDPI
- Keywords
- high-energy Li-ion cell; lithium-metal battery; lithium cobalt oxide; lithium trivanadate; lithium-metal powder anode
- Citation
- MATERIALS, v.12, no.12
- Indexed
- SCIE
SCOPUS
- Journal Title
- MATERIALS
- Volume
- 12
- Number
- 12
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/64809
- DOI
- 10.3390/ma12122025
- ISSN
- 1996-1944
- Abstract
- We developed a novel battery system consisting of a hybrid (LiCoO2 + LiV3O8) cathode in a cell with a hybrid (graphite + Li-metal) anode and compared it with currently used systems. The hybrid cathode was synthesized using various ratios of LiCoO2:LiV3O8, where the 80:20 wt% ratio yielded the best electrochemical performance. The graphite and Li-metal hybrid anode, the composition of which was calculated based on the amount of non-lithiated cathode material (LiV3O8), was used to synthesize a full cell. With the addition of LiV3O8, the discharge capacity of the LiCoO2 + LiV3O8 hybrid cathode increased from 142.03 to 182.88 mA h g(-1) (a 28.76% improvement). The energy density of this cathode also increased significantly, from 545.96 to 629.24 W h kg(-1) (a 15.21% improvement). The LiCoO2 + LiV3O8 hybrid cathode was characterized through X-ray diffraction analysis, scanning electron microscopy, and energy-dispersive X-ray spectroscopy. Its electrochemical performance was analyzed using a battery-testing system and electrochemical impedance spectroscopy. We expect that optimized synthesis conditions will enable the development of a novel battery system with an increase in energy density and discharge capacity.
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Collections - College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
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