以间苯二酚、甲醛为前驱体，通过溶胶凝胶法，采用 CO₂ 超临界干燥、冷冻干燥、常压干燥制备碳气凝胶． 采用 N 2 低温吸脱附法、四探针法、扫描电镜对碳气凝胶的电导率、孔结构等进行考察，研究碳气凝胶作为导电剂材料对锂 － 二氧化锰电池大电流放电性能的影响． 结果表明:不同干燥方法制备的碳气凝胶电阻率相近，比表面积差异较大，CO₂超临界干燥制备的碳气凝胶比表面积最大(1 017． 85m 2 /g);以 CO 2 超临界干燥制备的碳
气凝胶为导电剂的电池放电比容量最大，100mA 恒流放电比容量达到 101mAh/g，其放电平台比常压干燥的碳气凝胶高 80 mV 左右，1 mA 恒流放电比容量则差异较小． 结果显示碳气凝胶导电剂比商业乙炔黑导电剂性能更优。

Carbon aerogel was prepared by means of the sol-gel method from resorcinol and formaldehyde through CO₂ supercritical drying，freeze drying and ambient drying，and the resistivity and pore structure of the product were characterized via N 2 low-temperature adsorption desorption，four-probe method and SEM． Moreover，the influence of carbon aerogel conductive agent on the high-rate discharge performance of Li-MnO₂ battery was investigated． The results indicate that (1) the carbon aerogels produced via different drying methods are of similar resistivity but distinctly different specific surface areas; (2) the carbon aerogel prepared via CO₂ supercritical drying possesses the highest specific surface area (1017. 85m 2 /g) and the largest constant-current specific discharge capacity (101mAh/g at a current of 100mA); (3) the voltage plateau of the carbon aerogel prepared via CO₂ supercritical drying is 80mV higher than that prepared via ambient drying; and (4) there is little difference in the 1 mA discharge capacity of different carbon aerogels． All these above-mentioned statements show that carbon aerogel conductive agents possess higher performance than the commercial acetylene black．