Influence of Surface Potential on the Capacitive Performance of the TiO2 Thin-Film Electrode with Different Crystalline Forms
Influence of Surface Potential on the Capacitive Performance of the TiO2 Thin-Film Electrode with Different Crystalline Forms
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表面电位对不同晶型TiO2薄膜电极电容性能的影响
DOI：
10.1021/acs.langmuir.0c00663
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发表时间：
2020
期刊：
影响因子：
3.9
通讯作者：
Yang Wang
中科院分区：
文献类型：
--
作者：
Wei Tan;Tian Gao;Yang Wang
电化学电容器和电容去离子通过电极和电解质之间形成的界面层存储能量。可以改变氧化物电极的晶型和表面电位以提高电容。通过对不同烧结温度下TiO 2薄膜电极的表面性质和晶型的表征，发现不同的电极具有不同的表面电位，而表面电位受晶型的影响。随着烧结温度的升高，TiO 2从金红石型转变为金红石型，表面电位增加。电化学测试表明，电极电容从19.50 mF/cm ~ 2增加到41.82 mF/cm ~ 2。因此，金红石型TiO 2与金红石型TiO 2相比，具有更高的表面电位和更好的电容性能。在一般情况下，表面电位之间的关系，晶型，和电容性能是在这项工作中实现。希望能促进氧化物材料在电化学电容器和电容去离子方面的应用研究。
Electrochemical capacitor and capacitive deionization store energy through the interface layer formed between electrodes and electrolytes. The crystalline form and surface potential of the oxide electrode can be changed in order to improve the capacitance. By characterizing the surface property and crystalline form of the TiO2thin-film electrode at different sintering temperatures, it is showed that each electrode has its own surface potential which is affected by the crystalline structure. At elevated sintering temperature, TiO2transfers from anatase to rutile with an increased surface potential. The electrochemical tests show that the electrode capacitance increases from 19.50 to 41.82 mF/cm2. Therefore, rutile TiO2has a higher surface potential and better capacitive performance when used on a positive electrode compared with anatase TiO2. In general, the relation between the surface potential, the crystalline forms, and the capacitive performance is achieved in this work. We hope it can promote the investigation of oxide materials in the application for electrochemical capacitors and capacitive deionization.