Journal ArticleDOI
Porous Nickel Oxide/Nickel Films for Electrochemical Capacitors
Kuo-Chuan Liu,Marc A. Anderson +1 more
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TLDR
In this paper, NiO/Ni composite films have been found to perform as superior electrodes in electrochemical capacitor applications, which can provide a specific capacitance of 50 to 64 F/g.Abstract:
Nano-sized NiO/Ni composite films have been found to perform as superior electrodes in electrochemical capacitor applications. These films can provide a specific capacitance of 50 to 64 F/g. The specific energy and specific power of these films were 25 to 40 kJ/kg and 4 to 17 kW/kg, respectively. These specific quantities are dependent on the microstructure of the films. Superior performance can be obtained from samples having rough surfaces and consisting of larger secondary particles (ca. 100 to 120 nm in diam).read more
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A review of electrode materials for electrochemical supercapacitors
TL;DR: Two important future research directions are indicated and summarized, based on results published in the literature: the development of composite and nanostructured ES materials to overcome the major challenge posed by the low energy density.
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Manganese oxide-based materials as electrochemical supercapacitor electrodes
TL;DR: In order to fully exploit the potential of manganese oxide-based electrode materials, an unambiguous appreciation of basic questions and optimization of synthesis parameters and material properties are critical for the further development of EC devices.
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An Asymmetric Hybrid Nonaqueous Energy Storage Cell
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Influence of Microstucture on the Charge Storage Properties of Chemically Synthesized Manganese Dioxide
TL;DR: In this paper, the α-MnO2 powder was synthesized by a simple coprecipitation technique and tested as active electrode material for an electrochemical supercapacitor, showing that an average capacitance of 166 F/g can be reproducibly obtained within a voltage range −0.4/+0.5 V vs Hg/Hg2SO4 using a sweep rate of 2 mV/s.
Journal ArticleDOI
Hydrothermal synthesis and pseudocapacitance properties of MnO2 nanostructures.
TL;DR: Interestingly, SEM, TEM, and HRTEM revealed a variety of structures ranging from nanostructured surface with a distinct platelike morphology to nanorod depending upon the hydrothermal reaction time employed during the preparation of the manganese oxide: increasing the amount of individual nanorods in the materials prepared with longer hydrother mal reaction time.