【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
【机 构】
：
Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province,College of Chemistry and
论文部分内容阅读
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.
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