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首页> 外文期刊>Materials Science and Engineering >Probing the electrochemical properties of TiO_2/graphene composite by cyclic voltammetry and impedance spectroscopy
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Probing the electrochemical properties of TiO_2/graphene composite by cyclic voltammetry and impedance spectroscopy

机译：循环伏安法和阻抗谱法研究TiO_2 /石墨烯复合材料的电化学性能

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摘要

This work describes the role of graphene in charge transport and diffusion mechanism at TiO_2/graphene electrode-electrolyte interface. To explore the mechanism, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) were used. The CV results depict that TiO_2 and TiO_2/graphene electrodes behave differently in terms of charge transport and ion adsorption under the steady state conditions. The performance of TiO_2 electrode-electrolyte interface is mainly limited by the charge transport and pseudo-capacitive effects while the response of TiO_2/graphene electrode-electrolyte interface is mainly dominated by the double layer capacitive effects. The EIS measurement leads to the direct determination of broad range of parameters, i.e. series resistance, charge transport, rate capability and ion diffusion. The experimental results and their analysis will have a significant impact on understanding the role of graphene in the electrochemical response of an electrode-electrolyte interface.
机译：这项工作描述了石墨烯在TiO_2 /石墨烯电极-电解质界面的电荷传输和扩散机理中的作用。为了探索机理，使用了循环伏安法（CV）和电化学阻抗谱（EIS）。 CV结果表明，在稳态条件下，TiO_2和TiO_2 /石墨烯电极在电荷传输和离子吸附方面表现不同。 TiO_2电极-电解质界面的性能主要受电荷传输和拟电容效应的限制，而TiO_2 /石墨烯电极-电解质界面的响应主要受双层电容效应的支配。 EIS测量可直接确定各种参数，即串联电阻，电荷传输，速率能力和离子扩散。实验结果及其分析将对理解石墨烯在电极-电解质界面的电化学响应中的作用产生重大影响。

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