• 文献标题:   One-Pot Synthesis of Co3O4/Ag Nanoparticles Supported on N-Doped Graphene as Efficient Bifunctional Oxygen Catalysts for Flexible Rechargeable Zinc-Air Batteries
  • 文献类型:   Article
  • 作  者:   WANG Q, MIAO H, SUN SS, XUE YJ, LIU ZP
  • 作者关键词:   bifunctional catalyst, electronic device, oxygen evolution reaction, oxygen reduction reaction, zincair batterie
  • 出版物名称:   CHEMISTRYA EUROPEAN JOURNAL
  • ISSN:   0947-6539 EI 1521-3765
  • 通讯作者地址:   Chinese Acad Sci
  • 被引频次:   5
  • DOI:   10.1002/chem.201803236
  • 出版年:   2018

▎ 摘  要

Flexible rechargeable zinc-air batteries are considered as one of the most promising power supplies for the emerging flexible and wearable electronic devices. However, the development of flexible zinc-air batteries is stagnant due to the lack of efficient bifunctional catalysts with high oxygen catalytic activity and flexible solid-state electrolytes with high mechanical stability and ionic conductivity. In this work, Co3O4/Ag@NrGO composite was synthesized by a facile one-pot method, and the catalyst shows remarkable oxygen reduction reaction (ORR)/oxygen evolution reaction (OER) bifunctional catalytic activity and good long-term stability. In particular, the OER overpotential of Co3O4/Ag@NrGO reaches 437mV, outperforming that of the commercial IrO2 catalyst. This can be attributed to the combined effects of Co3O4, Ag, and N-rGO. Furthermore, PAA (polyacrylic acid) and PVA (polyvinyl alcohol) based gel-electrolytes have been developed as flexible solid-state electrolytes for zinc-air batteries. The results show that PAA-based electrolyte is more favorable to the flexible zinc-air battery with a high power density due to its relatively high ionic conductivity. The maximum power density of flexible zinc-air batteries with Co3O4/Ag@NrGO catalyst and PAA-based electrolyte can reach 108mWcm(-2), which is almost the highest value reached in recent reports. This work will provide valuable guidance for the development of flexible rechargeable zinc-air batteries with high power density and stability.