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An aqueous rechargeable Zn//Co3O4 battery is demonstrated with Zn@carbon fibers and Co3O4@Ni foam as the negative and positive electrodes, respectively, using an electrolyte of 1 m KOH and 10 × 10−3m Zn(Ac)2. It can operate at a cell voltage as high as 1.78 V with an energy density of 241 W h kg−1 and presents excellent cycling. The battery is also assembled into a flexible shape, which can be applied...
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