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Investigation of electrochemical performance of a high surface area mesoporous Mn doped TiO2 nanoparticle for a supercapacitor
Materials Letters ( IF 3 ) Pub Date : 2020-04-01 , DOI: 10.1016/j.matlet.2020.127363
Devi Prashad Ojha , Milan Babu Poudel , Han Joo Kim

Abstract In the present study, mesoporous Mn doped TiO2 (Mn-TiO2) was synthesised by a simple sol–gel followed by solvothermal method. Brownish white powder is further characterised to confirm the synthesis of 40–50 nm sized high surface area mesoporous Mn-TiO2 nanoparticle. The electrochemical study by using cyclic voltammetry (CV), galvanostatic charge–discharge (GCD) and electrochemical impedance spectroscopy (EIS) revealed nearly 2-fold enhancement of capacitance and the carrier density compared to the pure TiO2 nanoparticle. This enhanced electrochemical property could be mainly ascribed to larger surface area, mesoporous structure and appropriate concentration of Mn doping that altered the optoelectronic properties of wide band gap TiO2.

中文翻译:

用于超级电容器的高表面积介孔 Mn 掺杂 TiO2 纳米颗粒的电化学性能研究

摘要 在本研究中,介孔 Mn 掺杂的 TiO2 (Mn-TiO2) 是通过简单的溶胶-凝胶和溶剂热法合成的。进一步表征棕白色粉末以确认合成 40-50 nm 大小的高表面积介孔 Mn-TiO2 纳米颗粒。使用循环伏安法 (CV)、恒电流充放电 (GCD) 和电化学阻抗谱 (EIS) 进行的电化学研究表明,与纯 TiO2 纳米颗粒相比,电容和载流子密度提高了近 2 倍。这种增强的电化学性能主要归因于更大的表面积、介孔结构和适当浓度的 Mn 掺杂改变了宽带隙 TiO2 的光电性能。
更新日期:2020-04-01
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