Conductive nano-bridging dual network binder materials for thick cathode in high energy density lithium metal batteries
발표자
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초록
내용
Constructing a thick cathode can be a breakthrough in overcoming the capacity limitations of conventional active cathode materials used in rechargeable Li batteries. However, typical slurry-based methods induce cracking and flaking during thick electrode fabrication. In addition, significantly increasing the charge-transfer resistances and local current overloads affords poor rate capabilities and cycling stabilities, limiting electrode thickening. In this study, a synergistic dual-network combination strategy based on a conductive nano-fibrillar network (CNN) and a nano-bridging amorphous polyhydroxyalkanoate (aPHA) binder was used to demonstrate the feasibility of constructing a high-performance thick cathode. The small amount of CNN and aPHA dual network facilitates the fabrication of a thick cathode (≥ 250 μm thickness and ≥ 90 wt.% active cathode material by a mass-producible slurry method. In addition, the thick cathode exhibited high rate capability and excellent cycling stability.