论文部分内容阅读
用粉末微电极方法研究DMcT,PAn及DMcT/PAn的电化学性能.在有PAn存在时,DMcT的氧化还原峰电位差由1.90V降至0.07V,表明DMcT的电化学氧化还原反应速度加快.DMcT/PAn的电化学阻抗(123Ω)比DMcT的电化学阻抗(948Ω)小得多,说明PAn对DMcT的电化学氧化还原反应具有电催化作用.同时,DMcT使PAn在较高的电压时(大于4.0V,vsLi/Li+)能保持电化学活性,而且经过100次循环后,循环伏安(CV)曲线几乎没有变化,表明DMcT/PAn具有优良的循环稳定性和可逆性.比较粉末微电极的CV曲线和常规尺寸电极的CV曲线,粉末微电极能真实地反映PAn和DMcT复合时的氧化还原反应特性.
The electrochemical performance of DMcT, PAn and DMcT / PAn was investigated by the powder microelectrode method.The redox potential difference of DMcT decreased from 1.90V to 0.07V in the presence of PAn, indicating that the electrochemical redox reaction of DMcT accelerated. The electrochemical impedance of DMcT / PAn (123Ω) is much smaller than the electrochemical impedance of DMcT (948Ω), indicating that PAn has an electrocatalytic effect on the electrochemical redox reaction of DMcT. Meanwhile, DMcT makes PAn at higher voltage (> 4.0V, vsLi / Li +) remained electrochemically active, and the cyclic voltammetry (CV) curve showed almost no change after 100 cycles, indicating that DMcT / PAn has excellent cycling stability and reversibility.Compared with the powder microelectrode CV curves of CV curves and CV curves of conventional size electrodes, powder microelectrodes can truly reflect the redox reaction characteristics of PAn and DMcT composite.