期刊
ADVANCED MATERIALS
卷 29, 期 44, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201702698
关键词
flexible; heterostructures; Ni-NiO; Ni-Zn batteries; ultrastable
类别
资金
- National Natural Science Foundation of China [21403306, 51672315, 31530009]
- Guangdong Natural Science Funds for Distinguished Young Scholar [2014A030306048]
- National Key R&D Program of China [2016YFA0202604]
- Tip-top Scientific and Technical Innovative Youth Talents of Guangdong Special Support Program [2015TQ01C205]
- Pearl River Nova Program of Guangzhou [201610010080]
- Technology Planning Project of Guangdong Province [2015B090927007]
- Government of Guangzhou city for international joint-project [201704030020]
- Open Fund of Jiangsu Key Laboratory of Materials and Technology for Energy Conversion [MTEC-2015M05]
- Science and Technology Program of Guangzhou, China [201604010124]
Currently, the main bottleneck for the widespread application of Ni-Zn batteries is their poor cycling stability as a result of the irreversibility of the Ni-based cathode and dendrite formation of the Zn anode during the charging-discharging processes. Herein, a highly rechargeable, flexible, fiber-shaped Ni-Zn battery with impressive electrochemical performance is rationally demonstrated by employing Ni-NiO heterostructured nanosheets as the cathode. Benefiting from the improved conductivity and enhanced electroactivity of the Ni-NiO heterojunction nanosheet cathode, the as-fabricated fiber-shaped Ni-NiO//Zn battery displays high capacity and admirable rate capability. More importantly, this Ni-NiO//Zn battery shows unprecedented cyclic durability both in aqueous (96.6% capacity retention after 10 000 cycles) and polymer (almost no capacity attenuation after 10 000 cycles at 22.2 A g(-1)) electrolytes. Moreover, a peak energy density of 6.6 mu Wh cm(-2), together with a remarkable power density of 20.2 mW cm(-2), is achieved by the flexible quasi-solid-state fiber-shaped Ni-NiO//Zn battery, outperforming most reported fiber-shaped energy-storage devices. Such a novel concept of a fiber-shaped Ni-Zn battery with impressive stability will greatly enrich the flexible energy-storage technologies for future portable/wearable electronic applications.
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