Pomegranate-Inspired Design of Highly Active and Durable Bifunctional Electrocatalysts for Rechargeable Metal-Air Batteries

被引：279

作者：

Li, Ge ^{[1
]}

Wang, Xiaolei ^{[1
]}

Fu, Jing ^{[1
]}

Li, Jingde ^{[1
]}

Park, Moon Gyu ^{[1
]}

Zhang, Yining ^{[1
]}

Lui, Gregory ^{[1
]}

Chen, Zhongwei ^{[1
]}

机构：

[1] Univ Waterloo, Waterloo Inst Sustainable Energy, Waterloo Inst Nanotechnol, Dept Chem Engn, 200 Univ Ave West, Waterloo, ON N2L 3G1, Canada

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2016年 / 55卷 / 16期

基金：

加拿大自然科学与工程研究理事会;

关键词：

bifunctional catalyst; Co3O4; nanocrystals; DFT calculations; metal-air battery; pomegranate-like architecture; OXYGEN REDUCTION REACTION; CARBON NANOTUBES; MESOPOROUS CO3O4; GRAPHENE; ENERGY; CATALYSTS; LITHIUM; OXIDE; NANOPARTICLES; NANOCRYSTALS;

D O I：

10.1002/anie.201600750

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Rational design of highly active and durable electrocatalysts for oxygen reactions is critical for rechargeable metal-air batteries. Herein, we report the design and development of composite electrocatalysts based on transition metal oxide nanocrystals embedded in a nitrogen-doped, partially graphitized carbon framework. Benefiting from the unique pomegranate-like architecture, the composite catalysts possess abundant active sites, strong synergetic coupling, enhanced electron transfer, and high efficiencies in the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). The Co3O4-based composite electrocatalyst exhibited a high half-wave potential of 0.842V for ORR, and a low overpotential of only 450mV at the current density of 10mAcm(-2) for OER. A single-cell zinc-air battery was also fabricated with superior durability, holding great promise in the practical implementation of rechargeable metal-air batteries.

引用

页码：4977 / 4982

页数：6

共 57 条

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