期刊
ADVANCED MATERIALS
卷 30, 期 4, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201703657
关键词
atomically thin hybrid nanosheets; cobalt oxides; knittable; wearable electronics; zinc-air batteries
类别
资金
- National Key Research and Development Program [2016YFB0700205]
- National Natural Science Foundation for Distinguished Young Scholars [51125016]
- Joint Funds of the National Natural Science Foundation of China [U1601216]
- Tianjin Natural Science Foundation [16JCYBJC17600]
- U.S. Department of Energy (DOE), Office of Energy Efficiency and Renewable Energy, Vehicle Technologies Office
- DOE Office of Science by UChicago Argonne, LLC [DE-AC02-06CH11357]
Under development for next-generation wearable electronics are flexible, knittable, and wearable energy-storage devices with high energy density that can be integrated into textiles. Herein, knittable fiber-shaped zinc-air batteries with high volumetric energy density (36.1 mWh cm(-3)) are fabricated via a facile and continuous method with low-cost materials. Furthermore, a high-yield method is developed to prepare the key component of the fiber-shaped zinc-air battery, i.e., a bifunctional catalyst composed of atomically thin layer-by-layer mesoporous Co3O4/nitrogen-doped reduced graphene oxide (N-rGO) nanosheets. Benefiting from the high surface area, mesoporous structure, and strong synergetic effect between the Co3O4 and N-rGO nanosheets, the bifunctional catalyst exhibits high activity and superior durability for oxygen reduction and evolution reactions. Compared to a fiber-shaped zinc-air battery using state-of-the-art Pt/C + RuO2 catalysts, the battery based on these Co3O4/N-rGO nanosheets demonstrates enhanced and stable electrochemical performance, even under severe deformation. Such batteries, for the first time, can be successfully knitted into clothes without short circuits under external forces and can power various electronic devices and even charge a cellphone.
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