Chinese fir chip-based supercapacitor electrode, preparation method and supercapacitor

Abstract

A Chinese fir-based electrode material for supercapacitor is prepared from carbonized chip Chinese fir through activation treatment including CO2 activation, wherein the CO2 activation treatment comprises CO2 activation in CO2 flowing atmosphere at 650 DEG C-850 DEG C for 8-12 hours, the activated chips are polished to a thickness of 0.4-1.2 mm sheet. CO2, alkali and acid are sequentially activated to carbonize that cross-cut Chinese fir slices. Through a series of activation treatments, carbon wood chips have more micro-and nano-pores, and their specific surface area is increased to 613.2 m2g-1. By using these wafers as electrodes, symmetrical supercapacitors with excellent comprehensive performance, high specific capacitance and high energy density are fabricated.

Description

technical field

[0001] The invention relates to a capacitor, in particular to a supercapacitor electrode based on carbonized fir chips, a preparation method and a supercapacitor. Background technique

[0002] Supercapacitors (SCs) have attracted extensive attention as a novel green energy storage device. A series of novel electrode materials for SCs have been developed, such as carbonaceous electrodes, metal oxides, and transition metal sulfides. Recent studies have shown that the microstructure of electrode materials has an important impact on the comprehensive performance of SCs. To obtain effective electrode materials, nanomaterials with various microscopic features, such as nanoflowers, nanorods, and core-shell structures, have been synthesized. Recent findings suggest that electrode materials with uniformly arranged microchannels are more suitable for energy storage devices. Structural materials can enable fast charge separation and transport and effectively improve ...

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