以Co(NO3)2·6H2O和胆酸钠溶液混合制备了超分子自组装凝胶纳米纤维,以此凝胶纳米纤维为自模板,NH3·H2O为沉淀剂,在温和条件下制备了纳米α-Co(OH)2.X射线衍射(XRD)、红外光谱(FT-IR)、扫描电子显微镜(SEM)及透射电子显微镜(TEM)测试表征了其组成和微观结构.实验结果表明所得材料为纯相-维纳米纤维交错形成疏松网状结构的α-Co(OH)2,其直径在100～200 nm之间.用循环伏安和恒电流充放电等测试方法对α-Co(OH)2电化学电容行为进行了研究,结果表明:所得α-Co(OH)2在6 mol/L KOH溶液中,0～0.5 V(vs Hg/HgO)电位范围内,电流密度为1 A/g时,其单电极比容量达到1200F/g,经过800周循环,比容量稳定保持在初始容量的75％.其独特的纳米结构使其易于浸入电解液,具有快速的电化学响应特性,提高了电极材料的有效利用率,这种自模板法为制备纳米电容器电极材料提供了简易的途径.
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