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      Molecular-scale heteroassembly of redoxable hydroxide nanosheets and conductive graphene into superlattice composites for high-performance supercapacitors.

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          Abstract

          Artificial superlattice nanocomposites are successfully prepared by electrostatic heteroassembly of redoxable Co-Al or Co-Ni layered double hydroxide (LDH) nanosheets with graphene. The superlattice electrodes exhibit a high capacity up to ca. 650 F/g, which is approximately 6 times that of pure graphene. The composites are found to be capable of superfast charging and discharging, up to ca. 100 Hz, comparable with the high-power performance of graphene electrodes.

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          Author and article information

          Journal
          Adv. Mater. Weinheim
          Advanced materials (Deerfield Beach, Fla.)
          Wiley-Blackwell
          1521-4095
          0935-9648
          Jun 25 2014
          : 26
          : 24
          Affiliations
          [1 ] International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan.
          Article
          10.1002/adma.201400054
          24753376

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