MnO2/碳气凝胶粉末复合电极材料制备与性能研究

以间苯二酚(R)和甲醛为原料，碳酸钠（C）为催化剂，制备了碳气凝胶粉末（CRF），并以KBrO₃和MnSO₄?H₂O为原料，采用水热法制备了MnO₂/CRF复合材料。采用N₂吸附、X射线衍射技术对所制备的复合材料进行了表征。结果表明，水热法制备的MnO₂材料为纯的软锰矿相，且碳气凝胶粉的加入并未影响MnO₂的晶体结构。在1mol/LKOH电解液中进行的循环伏安和计时电位扫描测试表明，电极材料电化学性能稳定，具有较好的可逆性；在1mA电流密度下进行充放电测试时，电极比电容为146.6F/g；再循环500次后，电极仍能保持稳定的电容，显示出该电极材料是一理想的电化学电极材料。

Preparation and Study on Performance of MnO2/CRF Composite Electrode Materials

The carbon aerogel was prepared by the polycondensation of resorcinol (R) with formaldehyde (F) and sodium carbonate was added as a catalyst (C). Hydrothermal method was used to prepare MnO₂/CRF composite using KBrO₃ and MnSO₄?H₂O as raw materials. The structure of composite was characterized by N₂ adsorption and XRD. The result shows that MnO₂ prepared by hydrothermal method is pure pyrolusite, and the add of carbon aerogel powder doesn’t influence its crystal structure. Electrochemical characterization was performed using cyclic voltammetry and chronopotentiometry in 1 mol/L KOH aqueous solution electrolyte. The electrode has a stable electrochemistry performance, and preferable reversibility, the specific capacitanceof MnO₂/CRF electrode was 146.6 F/g under 1 mA current densities.The electrode presented a stable capacitance after 500 cycles and it’s an ideal electrochemical materials.