C/Ni(OH)2非对称电化学电容器正极改性研究

在C／KOH／Ni(OH)2型非对称电化学电容体系中，Ni(OH)2电极需具有快速发生电化学反应的能力与活性炭负极匹配。本文通过增加微集流体的掺杂比例．对活性物质进行球磨处理、固相掺杂碳纳米管等方法对正极进行改性研究。实验发现，增加正极微集流体的掺杂比例．可明显改善非对称电容大电流条件下的容量和循环性能；对正极活性物质进行球磨处理，有利于电极活性物质的转变．加快非对称电容的活化速度；在正极固相掺杂一定比例的碳纳米管可提高非对称电容的充放电效率和容量性质。

The Modification of Positive Electrode in C/Ni(OH)2 Hybrid Capacitor

In C/KOH/Ni(OH)-2 hybrid capacitor system,Ni(OH) 2 electrode should have the capability of taking electrochemical reaction quickly so as to match activated carbon electrode.Some modifications such as adding more quantities of electron conductor,ball milling the activated materials,and adulterating Ni(OH)-2 with carbon nanotubes were carried out to improve the performance of Ni(OH)-2 electrode.It was found that adding more tiny electron conductor in electrode could enhance the capacity and cycling performance of hybrid capacitor in high rate condition.Ball milling the activated materials would accelerate the activating course of hybrid capacitor.And aduterating Ni(OH)-2 with carbon nanotubes which had a special electron conducting ability could improve the charge-discharge efficiency of hybrid capacitor and increase the capacitance of Ni(OH)-2 electrode.