Improved Stability of Lithium-Ion Battery Cathodes Using Conducting Polymer Binders
- Authors
- Lee, Hyun Deok; Jung, Gyu Jin; Lee, Ho Seok; Kim, TaeYoung; Byun, Jae Dong; Suh, Kwang S.
- Issue Date
- Jan-2016
- Publisher
- AMER SCIENTIFIC PUBLISHERS
- Keywords
- Lithium-Ion Battery; Cathode Composite; Lithium-Nickel-Manganese-Cobalt Oxide; Conducting Polymer Binder; Poly(3,4-ethylenedioxythiophene)
- Citation
- SCIENCE OF ADVANCED MATERIALS, v.8, no.1, pp.84 - 88
- Journal Title
- SCIENCE OF ADVANCED MATERIALS
- Volume
- 8
- Number
- 1
- Start Page
- 84
- End Page
- 88
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/8690
- DOI
- 10.1166/sam.2016.2606
- ISSN
- 1947-2935
- Abstract
- Lithium-nickel-manganese-cobalt oxide (LiNixCoyMnzO2) (NCM) has a high specific capacity and is used as a cathode material for Li-ion batteries. However, the poor cycling stability associated with NCM-based cathode composites imposes a challenge for achieving stable cycling performance. Here, we report the use of a conducting polymer as a binder to yield a stable NCM-based cathode composite. Poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) was successfully used with a NCM cathode material, resulting in many advantages, such as improved electrical conductivity within the electrode and strong adhesion of the electrode composite on the current collector. With PEDOT:PSS binder, the NCM-based cathodes showed stable cycling performance and an improved capacity retention of similar to 85% after 100 cycles at 45 degrees C.
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