棉花基多孔碳材料的合成、微结构及超电性能研究

由于制备方法简单并且原料易得, 多孔碳合成广泛采用生物质材料, 并用于能源存储。以天然生物质棉花作为碳源, 通过简单的一步法制备得到氮掺杂多孔碳材料。这种多孔碳材料在碳化温度为750℃时具有480 m²/g的比表面积和6.84%的高含氮量。当用作超级电容器电极材料时, 这种碳材料显示出了良好的电容性能。在1 mol/L硫酸电解液中, 电流密度为1 mol/L时, 比电容可以达到252 F/g, 并且在循环10000圈之后仍能保留94%的原电容。这种低成本的棉花基碳材料为超级电容器应用提供了可能。

Porous Cotton-derived Carbon: Synthesis,Microstructure and Supercapacitive Performance

Biomass materials were widely used to synthesize porous carbon for energy storages considering the simple preparation method and wide availability of raw materials. Herein, we prepared nitrogen doped porous carbon from natural cotton via a simple one-step eco-friendly method. The cotton-derived carbon material delivers a maximum specific surface area of 480 m²/g and a high nitrogen content of 6.84% at the carbonization temperature of 750℃. The obtained material shows excellent performance when used as supercapacitor electrode materials, which exhibits a maximal specific capacitance of 252 F/g at 1 A/g in 1 mol/L H₂SO₄ electrolyte and retains 94% of the capacitance after 10,000 cycles at 15 A/g. The good performance of the low-cost carbon electrode made from cotton provides a potential application for electrochemical capacitors.