Novel fusiform core-shell-MOF derived intact metal@carbon 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
• 来源期刊: 能源化学
• 年，卷（期）: 2022,（1）
• 页码范围: 385-394
• 页数: 10页
• 语种: 英文

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 intact metal@carbon structure,exhibiting supe-rior electrocatalytic activities toward ORR and OER that can be comparable with the Pt/C and RuO2 cat-alysts,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 perfor-mance 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.