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3D Self-Supporting Carbon Nanotube-Porous Carbon-MnO2 Sponges for Zinc-Ion Batteries
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DOI：10.1142/S1793292026500955.png)
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Abstract
En 中文
MnO2-based zinc-ion batteries (ZIBs) are an energy storage system characterized by high-safety, low cost, and high theoretical capacity. However, MnO2 cathodes suffer from poor conductivity and structural instability, which are detrimental to their energy storage performance. Herein, we utilize a carbon nanotube-pitch-derived porous carbon (CNT-PPC) sponge as a self-supporting substrate for depositing MnO2. As a ZIB cathode, the CNT-PPC-MnO2 sponge exhibits a high specific capacity of 411.7mAh/g at 0.1A/g, high rate capability, and stable cycling performance. The zinc-ion storage kinetics are investigated via electrochemical mechanism analysis and calculations. The as-prepared CNT-PPC-MnO2 sponge//Zn ZIB can deliver a high-energy density of 556Wh/kg. This work provides a design strategy of a self-supporting carbon-based substrate for loading active materials.
Keywords:
Carbon nanotube sponge
porous carbon
manganese dioxide
zinc-ion battery
self-supporting carbon substrate
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1.1
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