以间苯二酚和甲醛为原料,通过溶胶-凝胶方法制备有机气凝胶,再在不同温度下炭化,得到具有三维孔洞结构的炭气凝胶。用XRD和SEM研究了炭气凝胶的晶态和微观形貌,用恒流充放电测试了炭气凝胶电极的电化学性能。较低炭化温度(750℃)下制备的样品具有较高的可逆容量(500mAh/g以上)。从第3次循环起,库仑效率保持在95%以上。
The organic aerogel was prepared by sol-gel method, with resorcinol and formaldehyde as raw materials. The carbon aerogel with three-dimensional space structure was prepared by charring the organic aerogel at different temperatures. The crystalline state and microstructure of the carbon aerogel were tested by XRD and SEM. The electrochemical performance of the carbon aerogel electrode was studied by constant current charge-discharge test. The sample charring at lower temperature(750℃ ) had higher reversible capacity (above 500 mAh/g). The coulomb efficiency was above 95% starting from the third cycle.