原位电化学合成铁基电极材料及其超级电容器性能

In Situ Electrochemical Synthesis of Fe-Based Electrode for Supercapacitors

采用胶体纳米粒子为模型进行研究。假设活性阳离子均匀分布在导电碳与粘结剂中,电解液离子的渗入可以原位形成活性胶体团簇。通过原位电化学方法合成了不同组成的铁基超级电容器电极材料。在不同的阳离子电解液中,铁胶体离子电极的电容不同,其中在KOH、NaOH、LiOH电解液中分别为1113、927、755 F·g^-1。通过胶体的介尺度结构构筑,实现离子到材料性能的跨尺度可控调节。通过对胶体模型的拓展,提供了原位组成调节到材料性能跨尺度调控的新方法。

This work adopts the colloidal nanoparticles as a model for research due to the prominent specific surface area of colloidal nanoparticles.There was a hypothesis that cations uniformly distributed in the conductive carbon and binder.Electrolyte ion can interact with cations to form reactive colloidal clusters in situ.Herein,the electro-chemical method was adapted to synthesize different iron based electrode materials by the changes of electrolyte.Fe-based electrodes exhibited specific capacitances of 1113,927 and 755 F·g^-1 in KOH,NaOH and LiOH aqueous electrolyte,respectively.A novel type of colloid systems with adjustable structure was built,achieving multiscale controllable regulation of colloid structure and material performance.By extending the colloid model,a novel meth-od of in situ composition adjustment to cross-scale control of material properties was provided.