Preparation and Electrochemical Performance of Carbon Fiber Electric Field Electrode Modified by Silane Coupling Agent with Amino Groups

The electrochemical performance and electric field response performance of the carbon fiber electrode before and after modification by N- (2-aminoethyl) -3-aminopropyltrimethoxysilane (KH-792) were investigated.Resultsshow that the electrochemical performance of the modified carbon fiber electrode is greatly improved, the specific capacity is 105.96 F/g, 2.2 times of that of the unmodified, the capacitive reactance at low frequency has been decreased. The modified electrode pair has high stability and its potential difference drifts about 10 μV/d. The electrode pair responds well to the 1 m V/1 m Hz electric field signal applied, and the electrochemical self-noise can be as low as 1.7 n V/rtHz@1 Hz.