Effect of hybrid conductive additives on all-solid-state lithium batteries using Li2S-P2S5 glass-ceramics
- Authors
- Hong, Sungbo; Kim, Junghoon; Kim, Minjeong; Meng, Xianghe; Lee, Giho; Shin, Dongwook
- Issue Date
- Apr-2015
- Publisher
- ELSEVIER SCI LTD
- Keywords
- All-solid-state lithium battery; Composite cathode; Binary conductive additive; Electrochemical property
- Citation
- CERAMICS INTERNATIONAL, v.41, no.3, pp.5066 - 5071
- Indexed
- SCIE
SCOPUS
- Journal Title
- CERAMICS INTERNATIONAL
- Volume
- 41
- Number
- 3
- Start Page
- 5066
- End Page
- 5071
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/157568
- DOI
- 10.1016/j.ceramint.2014.12.076
- ISSN
- 0272-8842
- Abstract
- In order to enhance the electrochemical performance of all-solid-state composite cathodes, a hybrid of conductive additives consisting of Vapor Grown Carbon Fiber (VGCF), which had a high aspect ratio, and Super P carbon with a high surface area, were employed in all-solid-state composite cathodes. The effect of these additives on the electrochemical properties and microstructure was investigated. Microstructures that had valid electron conducting networks consisting of short-range conducting paths crossing the surfaces of individual LiCoO2 particles and long-range conducting paths linking neighboring LiCoO2 particles were obtained by blending of fibrous VGCF with nano-sized spherical Super P carbon particles. As a result, the all-solid-state composite cathodes using hybrid conductive additives showed a higher electronic conductivity and lower charge-transfer resistance compared with those using single conductive additives, which resulted in the highest discharge capacity of 68 mA h g(-1) at 1 C and 38 mA h g(-1) at 2 C when using the all-solid-state composite cathode with 2 wt% of VGCF and 1 wt% of Super P carbon. This indicated that the use of a hybrid conductive additive was a suitable and effective method to enhance the reversible capacity of the all-solid-state composite cathode at high current densities.
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