ZIF-Derived Co9-xNixS8 Nanoparticles Immobilized on N-Doped Carbons as Efficient Catalysts for High-Performance Zinc-Air Batteries

被引：66

作者：

Cai, Zuocheng ^{[1
]}

Yamada, Ikuya ^{[2
]}

Yagi, Shunsuke ^{[1
]}

机构：

[1] Univ Tokyo, Inst Ind Sci, Tokyo 1538505, Japan

[2] Osaka Prefecture Univ, Dept Mat Sci, Grad Sch Engn, Sakai, Osaka 5998570, Japan

来源：

ACS APPLIED MATERIALS & INTERFACES | 2020年 / 12卷 / 05期

基金：

日本学术振兴会;

关键词：

bimetallic sulfide; framework structure; ion adsorption process; oxygen reduction reaction; zinc-air battery;

D O I：

10.1021/acsami.9b19268

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Bimetallic sulfides have been attracting considerable attention because of their high catalytic activities for oxygen reduction reaction (ORR) and oxygen evolution reaction; thus, they are considered efficient catalysts for important energy conversion devices such as fuel cells and metal-air batteries. Here, the catalytic activity of a novel catalyst composed of Co9-xNixS8 nanoparticles immobilized on N-doped carbons (Co9-xNixS8/NC) is reported. The catalyst is synthesized using a Ni-adsorbed Co-Zn zeolitic imidazolate framework (ZIF) precursor (NiCoZn-ZIF). Because of the porous structure of ZIF and the high intrinsic activity of the bimetallic sulfide nanoparticles, the Co9-xNixS8/NC catalyst exhibits high half-wave potential 0.86 V versus reversible hydrogen electrode for ORR and outstanding bifunctional catalytic performance. When Co9-xNixS8/NC is applied as a cathode catalyst in zinc-air batteries, considerably higher power density of about 75 mW cm(-2) and discharge voltage are achieved compared to those of batteries with commercial Pt/C and other ZIF-derived catalysts. The zinc-air battery with the Co9-xNixS8/NC catalyst shows a high cyclability more than 170 cycles for 60 h with almost negligible decline at 10 mA cm(-2). Our work provides a new insight into the design of bimetallic sulfide composites with high catalytic activities.

引用

页码：5847 / 5856

页数：10

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