Manganese and cobalt bimetallic-doped Prussian blue analogs as a bifunctional electrocatalyst for zinc-air batteries

Zhou Yang; Hongwei Niu; Fanzhen Yu; Xinjie Xie; Keyi Qian; Kehui Bian; Meng Xiang; Shuang Dong

doi:10.1016/j.jcis.2022.07.148

Manganese and cobalt bimetallic-doped Prussian blue analogs as a bifunctional electrocatalyst for zinc-air batteries

J Colloid Interface Sci. 2022 Dec 15;628(Pt A):588-596. doi: 10.1016/j.jcis.2022.07.148. Epub 2022 Jul 28.

Authors

Zhou Yang¹, Hongwei Niu², Fanzhen Yu³, Xinjie Xie², Keyi Qian², Kehui Bian², Meng Xiang², Shuang Dong⁴

Affiliations

¹ Department of Material Engineering, Jiangsu University of Technology, Changzhou 213001, China. Electronic address: zhouyang@jsut.edu.cn.
² Department of Material Engineering, Jiangsu University of Technology, Changzhou 213001, China.
³ Department of Macromolecular Science, Fudan University, Shanghai 200433, China.
⁴ School of Chemical Engineering and Materials, Changzhou Institute of Technology, Changzhou 213032, China. Electronic address: dongs@czu.cn.

PMID: 35940143
DOI: 10.1016/j.jcis.2022.07.148

Abstract

Zinc-air battery is a novel safe and environment-friendly energy storage device, but the noble-metal electrocatalysts at the air electrode urge people to search for new substitutes. Herein, different ratios of manganese (Mn) and cobalt (Co) are doped into the iron Prussian blue analogs (PBAs) and used as bifunctional electrocatalysts. The Mn_1.33Co_0.67-PBA shows the outstanding electrocatalytic properties that the half-wave potential is 0.79 V, the E_j₌₁₀ of OER is 1.54 V, and the ΔE is as low as 0.75 V, which is superior to that of Pt/C + RuO₂ system (0.78 V). Benefiting from the bimetallic-doping advantage, the Mn_1.33Co_0.67-PBA has good stability in alkaline solutions. Besides, the Mn_1.33Co_0.67-PBA was assembled into ZAB, possessing a high maximum power density of 161 mW cm^-2 and a large specific capacity of 617 mAh g^-1, as well as excellent cycle stability. The as-prepared bimetallic-doped PBA has the potential for applications in the energy storage and conversion field.

Keywords: Bifunctional electrocatalyst; Bimetallic-doping; Prussian blue analogs; Zinc-air battery.