期刊
ADVANCED MATERIALS
卷 29, 期 26, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201700274
关键词
durability; flexible; rechargeable; ultrahigh energy density; Zn-MnO2 batteries
类别
资金
- National Natural Science Foundation of China [21403306, 2016YFA0202604, 31530009]
- Guangdong Natural Science Funds for Distinguished Young Scholar [2014A030306048]
- Tip-top Scientific and Technical Innovative Youth Talents of Guangdong Special Support Program [2015TQ01C205]
- Technology Planning Project of Guangdong Province [2015B090927007]
- Pearl River Nova Program of Guangzhou [201610010080]
Advanced flexible batteries with high energy density and long cycle life are an important research target. Herein, the first paradigm of a high-performance and stable flexible rechargeable quasi-solid-state Zn-MnO2 battery is constructed by engineering MnO2 electrodes and gel electrolyte. Benefiting from a poly(3,4-ethylenedioxythiophene) (PEDOT) buffer layer and a Mn2+-based neutral electrolyte, the fabricated Zn-MnO2@PEDOT battery presents a remarkable capacity of 366.6 mA h g(-1) and good cycling performance (83.7% after 300 cycles) in aqueous electrolyte. More importantly, when using PVA/ZnCl2/MnSO4 gel as electrolyte, the as-fabricated quasi-solid-state Zn-MnO2@PEDOT battery remains highly rechargeable, maintaining more than 77.7% of its initial capacity and nearly 100% Coulombic efficiency after 300 cycles. Moreover, this flexible quasi-solid-state Zn-MnO2 battery achieves an admirable energy density of 504.9 W h kg(-1) (33.95 mW h cm(-3)), together with a peak power density of 8.6 kW kg(-1), substantially higher than most recently reported flexible energy-storage devices. With the merits of impressive energy density and durability, this highly flexible rechargeable Zn-MnO2 battery opens new opportunities for powering portable and wearable electronics.
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