采用直接碳化法,羟丙基纤维素(HPC)、聚乙烯醇(PVA)、钼酸钾(K2MoO4)和碳酸钾(K2CO3)的混合物于900℃氢气氛围下碳化,制备了高比表面积碳化钼/碳复合体(MCCs).应用XRD、TG、SEM和电化学方法对其进行了表征和性能研究.XRD图谱表明,碳基上合成了α-Mo2C及微量Mo3C2.加入K2CO3增加了微孔性,产物MCCs的比表面积可达400～1000m2 /g.循环伏安(CV)曲线中出现的氧化还原峰可归属于充放电过程中碳化钼氧化形成的羟基氧化钼(MoOx(OH)y).羟基氧化钼发生法拉第反应产生的赝电容与碳材料的双电层电容相叠加,增加了比容量.充放电过程中,部分样品在电流密度1A/g下仍保持高于150F/g的容量,表现出良好的电化学性能.
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