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Published on: September 29, 2020
A high power density paper-based zinc-air battery with a hollow channel structure
Haoran Zhang1, Biao Zhang1, Yang Yang1
1Key Laboratory of Low-grade Energy Utilization Technologies and Systems (Chongqing University), Ministry of Education, Chongqing 400030, China. yang_yang@cqu.edu.cn and School of Energy and Power Engineering, Institute of Engineering Thermophysics, Chongqing University, Chongqing 400030, China.
Abstract:
In light of the surging research interest in disposable electronics, great demands have been imposed on compact power sources. Herein, a paper-based zinc-air battery that takes advantage of a hollow channel structure is reported. Unlike conventional paper-based metal-air batteries and fuel cells that tightly immobilize the electrode on the paper channel, a hollow channel layer containing potassium hydroxide solution electrolyte is sandwiched between the electrodes and paper channel layer. This novel zinc-air battery is capable of delivering a peak power density of 102 mW cm-2, surpassing state-of-the-art paper-based power sources. The superior power density originates from the boosted electrochemically active surface area of the cathode, which enhances the oxygen reduction reaction kinetics.
