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Abstract

Carbonized cellulose fiber electrodes for high-frequency electrochemical capacitors and method for fabricating the same is disclosed. The method includes carbonizing a cellulose fiber substrate by subjecting the cellulose fiber substrate to a rapid pyrolysis process in a preheated furnace having an inert environment at a pyrolysis temperature of at least 1000° C., resulting in a carbonized cellulose substrate. The method also includes preparing a hydrothermal solution, and depositing vertically oriented nanoflakes on the carbonized cellulose substrate by immersing the carbonized cellulose substrate in the hydrothermal solution and conducting a hydrothermal reaction, thereby forming the electrode. The vertically oriented nanoflakes may be composed of MoS₂. The cellulose fiber substrate may be a cellulose tissue sheet. The electrochemical capacitor includes at least two electrodes, each having vertically oriented nanoflakes deposited on a carbonized cellulose substrate, and an electrolyte positioned between each pair of the at least two electrodes.

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First Claim