期刊
SCIENCE OF ADVANCED MATERIALS
卷 8, 期 1, 页码 84-88出版社
AMER SCIENTIFIC PUBLISHERS
DOI: 10.1166/sam.2016.2606
关键词
Lithium-Ion Battery; Cathode Composite; Lithium-Nickel-Manganese-Cobalt Oxide; Conducting Polymer Binder; Poly(3,4-ethylenedioxythiophene)
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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