Novel fusiform core-shell-MOF derived in tact metal@carb on composite:An efficient cathode catalyst for aqueous and solid-state Zn-air batteries  

作　　者：Di Zhou Hongquan Fu Jilan Long Kui Shen Xinglong Gou 

机构地区：[1]Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province,College of Chemistry and Chemical Engineering,China West Normal University,Nanchong 637000,Sichuan,China [2]Key Laboratory of Fuel Cell Technology of Guangdong Province,School of Chemistry and Chemical Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China

出　　处：《Journal of Energy Chemistry》2022年第1期385-394,I0011,共11页能源化学（英文版）

基　　金：supported by the National Natural Science Foundation of China (21706217);the Fundamental Research Funds of China West Normal University (CXTD2020-1,17C035);the Scientific Research Fund of Science & Technology of Sichuan (2021YJ0410);the Province and Scientific Research Fund of Sichuan Provincial Education Department (17ZA0382).

摘　　要：Owing to the varied mechanisms of ORR/OER,exploiting cost-effective bifunctional catalysts with robust ORR/OER activities and excellent performances in Zn-air batteries is still a challenge.In this work,the Co/CoO@NSC bifunctional catalyst is obtained by using Zn-MOF@Co-MOF as self-template.The Co/CoO@NSC composite has interconnected porous architecture with in tact metal@carb on structure,exhibiting superior electrocatalytic activities toward ORR and OER that can be comparable with the Pt/C and RuO_(2) catalysts,respectively.The Co/CoO@NSC-based aqueous Zn-air battery achieves a high specific capacity(759.7 mAh/g)and energy density(990.5 Wh/kg),and ultra-long rechargeable property(more than 400 h/1200 cycles).The Co/CoO@NSC-based solid-state Zn-air battery also delivers an excellent performance with a long cycle life(more than 143 h/858 cycles).Most importantly,the newly synthesized and recharged Co/CoO@NSC-based solid-state Zn-air battery can be used to light up a 2 V LED lamp for more than 28 h,demonstrating the superior practicability as rechargeable power source.

关 键 词：Core-shell structure Metal organic framework Aqueous Zn-air battery Solid-state Zn-air battery Ultra long cycle life 

分 类 号：O643.36[理学—物理化学] TM911.41[理学—化学]