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Two classes of carbon materials with different microstructures were chosen for electric double layer capacitors (EDLCs). One is a mesophase pitch-based carbon fiber (MPCF). The other is an isotropic pitch-based carbon fiber (IPCF). Both series of samples were activated by KOH with varying the KOH addition fraction. The MF-series prepared from MPCFs by several KOH fractions exhibited a good capacitance...
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