青岛科技大学主页平台管理系统赵健--中文主页-- Engineering ultrahigh-specific-capacity α-Fe<inf>2</inf>O<inf>3</inf> nanoparticles and Ni(OH)<inf>2</inf>/Co<inf>0.85</inf>Se nanostructures separately anchored on N-doped graphene nanotubes toward alkaline rechargeable battery

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关键字：Secondary batteries;Display devices - Doping (additives) - Electrodes - Graphene - Hematite - Nanoparticles - Nanotubes - Nickel compounds - Selenium compounds
摘要：In this paper, the N-doped graphene nanotubes (N-GNTs) are used as the scaffolds to grow α-Fe<inf>2</inf>O<inf>3</inf> nanoparticles (NPs) and Ni(OH)<inf>2</inf> nanosheets arrays (NAs)/Co<inf>0.85</inf>Se nanoparticles (NPs) respectively, which are directly acted as hybrid negative and positive electrodes for alkaline rechargeable battery (ARB). The synergistic merits from the supporters and active materials enable the N-GNTs@ α-Fe<inf>2</inf>O<inf>3</inf> NPs to deliver an ultrahigh specific capacity of 309 mAh g−1 at 1 A g−1, and good rate performance. By paring with the N-GNTs@ Ni(OH)<inf>2</inf> NAs/Co<inf>0.85</inf>Se NPs (268 mAh g−1 at 1 A g−1), an ARB configuration is assembled. Contributed by the particular electrode architectures, the device displays a high energy density of 78.8 Wh kg−1 at 2.47 kW kg−1 and robust cycling life (91.3% retention of the initial specific capacity over 10,000 cycles). This strategy reported here opens up a new avenue to construct unique hybrid electrodes and maximizes their superiority, which leads to the ultrahigh capacity for the fabrication of next-generation energy storage devices. © 2020 Elsevier Inc.
卷号：165
期号：-
是否译文：否