Highly efficient bifunctional layered triple Co, Fe, Ru hydroxides and oxides composite electrocatalysts for Zinc-Air batteries

被引：27

作者：

Gao, Yaling ^{[1
]}

Zhang, Tongrui ^{[1
]}

Mao, Yuezhen ^{[1
]}

Wang, Jingyu ^{[1
]}

Sun, Chunwen ^{[1
]}

机构：

[1] China Univ Min & Technol Beijing, Sch Chem & Environm Engn, Beijing 100083, Peoples R China

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2023年 / 935卷

基金：

中国国家自然科学基金;

关键词：

Bifunctional catalyst; Layered hydroxides; Oxide; Synergistic effect; Zinc -air battery; OXYGEN REDUCTION REACTION; EVOLUTION; IDENTIFICATION;

D O I：

10.1016/j.jelechem.2023.117315

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The preparation of bifunctional catalysts for oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) is of great practical significance for the development of zinc-air batteries (ZAB). Layered double hydroxides (LDH) have been widely used in OER due to their low cost and adjustable structure. However, the poor ORR performance of LDH has hindered the development and application of zinc-air battery. In this work, CoFeRu-LDH was synthesized by hydrothermal method and then it was partially oxidized to obtain the oxides/LDH. As a bifunctional catalyst, RuO2, Fe2O3 and LDH have a high activity towards OER, while Co3O4 shows high reactivity towards ORR. Therefore, the catalyst oxides/LDH shows an excellent bifunctional activity with the voltage difference (Delta E) between E10 and E1/2 of 0.734 V. The assembled ZAB with the catalyst as the air electrode has a power density of 163 mW cm-2, a discharge specific capacity of 730 mAh g-1 and cycle stability of up to 210 h, proving its potential practical application in ZABs.

引用

页数：8

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