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Constructing ultra-thin Ni-MOF@NiS2 nanosheets arrays derived from metal organic frameworks for advanced all-solid-state asymmetric supercapacitor
Materials Research Bulletin ( IF 5.4 ) Pub Date : 2020-12-21 , DOI: 10.1016/j.materresbull.2020.111186
Jiawei Zhang , Yu Li , Manshu Han , Qianshan Xia , Qingguo Chen , Minghua Chen

Metal-organic frameworks (MOFs) consisted of metal ions and organic linker have been successful applied to energy storage device as promising electrode materials candidates for energy storage. However, pristine MOFs have been limited application due to poor electrical conductivity and stability. Here, we design ultra-thin Ni-MOF@NiS2 nanosheet arrays derived from Ni-MOF as self-sacrificed template and precursor. Particularly, this unique heterostructure not only enhances the conductivity but also holds the porous Ni-MOF structure. The as-prepared Ni-MOF@NiS2 electrode delivers a superior specific capacity and rate performance compared with the Ni-MOF electrode. The asymmetric supercapacitor (ASC) consisting of Ni-MOF@NiS2 and active carbon shows good cycling stability and high power density and energy density. This work may provide an innovative strategy for the rational preparation of MOF arrays electrode.



中文翻译:

从金属有机骨架构建超薄Ni-MOF @ NiS2纳米片阵列,用于先进的全固态不对称超级电容器

由金属离子和有机连接基组成的金属有机骨架(MOF)已成功地应用于储能设备,作为有希望的储能电极材料候选。然而,由于不良的电导率和稳定性,原始的MOF已经被限制了应用。在这里,我们设计了源自Ni-MOF的超薄Ni-MOF @ NiS 2纳米片阵列作为自牺牲模板和前体。特别地,这种独特的异质结构不仅增强了导电性,而且保持了多孔的Ni-MOF结构。与Ni-MOF电极相比,所制备的Ni-MOF @ NiS 2电极具有出色的比容量和倍率性能。由Ni-MOF @ NiS 2组成的不对称超级电容器(ASC)活性炭显示出良好的循环稳定性以及高功率密度和能量密度。这项工作可能为合理制备MOF阵列电极提供一种创新策略。

更新日期:2020-12-21
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