CAJ | 학술논문

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N2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（1017．85 m2／g）；以CO2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，100 mA恒流放电比容量达到101 mAh／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．
이간분이분、갑철위전구체，통과용효응효법，채용CO2초림계간조、냉동간조、상압간조제비탄기응효．채용N2저온흡탈부법、사탐침법、소묘전경대탄기응효적전도솔、공결구등진행고찰，연구탄기응효작위도전제재료대리－이양화맹전지대전류방전성능적영향．결과표명：불동간조방법제비적탄기응효전조솔상근，비표면적차이교대，CO2초림계간조제비적탄기응효비표면적최대（1017．85 m2／g）；이CO2초림계간조제비적탄기응효위도전제적전지방전비용량최대，100 mA항류방전비용량체도101 mAh／g，기방전평태비상압간조적탄기응효고80 mV 좌우，1 mA항류방전비용량칙차이교소．결과현시탄기응효도전제비상업을결흑도전제성능경우．
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 in-fluence of carbon aerogel conductive agent on the high-rate discharge performance of Li-MnO2 battery was investiga-ted.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 CO 2 supercritical drying posse-sses the highest specific surface area (1 017.85 m2/g) and the largest constant-current specific discharge capacity (101 mAh/g at a current of 100 mA); (3) the voltage plateau of the carbon aerogel prepared via CO 2 supercritical drying is 80 mV higher than that prepared via ambient drying; and ( 4 ) there is little difference in the 1 mA dis-charge capacity of different carbon aerogels .All these above-mentioned statements show that carbon aerogel con-ductive agents possess higher performance than the commercial acetylene black .