Fe^(2+)掺杂Mn_(2)O_(3)电极材料的制备与赝电容特性研究  

Preparation and Pseudocapacitive Properties of Fe^(2+)-doped Mn_(2)O_(3)Electrode Material

作　　者：刘烨昕 杨晓峰[1] 陈志萍[1] 张玉莹 LIU Ye-xin;YANG Xiao-feng;CHEN Zhi-ping;ZHANG Yu-ying(School of Chemistry and Chemical Engineering,North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学化学与化工学院,山西太原030051

出　　处：《精细化工中间体》2025年第2期50-54,59,共6页Fine Chemical Intermediates

基　　金：山西省自然科学基金项目(201901D111138);中北大学第十九届研究生科技立项项目(自然科学项目,20231922)。

摘　　要：采用热分解双金属氢氧化物合成Fe^(2+)掺杂Mn_(2)O_(3)电极材料。电化学性能测试表明,Fe^(2+)掺杂Mn_(2)O_(3)在0.4 A/m^(2)电流密度下比电容达442.8 F/g,是Mn_(2)O_(3)(69.6 F/g)的6.36倍;在1000次循环后Fe^(2+)掺杂Mn_(2)O_(3)循环保持率比Mn_(2)O_(3)提高10.6%;电荷转移阻抗比Mn_(2)O_(3)低0.18Ω。X射线衍射(XRD)、X射线光电子能谱(XPS)实验证明Fe^(2+)成功掺至Mn_(2)O_(3)。并发现Fe^(2+)掺杂Mn_(2)O_(3)电化学性能提升的原因是Fe^(2+)掺杂后,Mn_(2)O_(3)表面氧空位数量增加,局部电子结构改变,晶格内部结构稳定性提高,促进电极的电荷转移和离子迁移,为功能性Mn_(2)O_(3)材料的研发提供参考。The Fe^(2+)-doped Mn_(2)O_(3)electrode material was synthesized by the thermal decomposition of bimetallic hydroxide.The electrochemical performance test showed that the specific capacitance of Fe^(2+)-doped Mn_(2)O_(3)was 442.8 F/g at 0.4 A/m^(2)current density,which was 6.36 times that of Mn_(2)O_(3)(69.6 F/g);the cycle retention rate of Fe^(2+)-doped Mn_(2)O_(3)was 10.6%higher than that of Mn_(2)O_(3)after 1000 cycles;the charge transfer impedance of Fe^(2+)-doped Mn_(2)O_(3)was 0.18Ωlower than that of Mn_(2)O_(3).X-ray diffraction(XRD)and X-ray photoelectron spectroscopy(XPS)experiments showed that Fe^(2+)was successfully doped into Mn_(2)O_(3).At the same time,it was found that the reason for the improvement of the electrochemical performance was that the doping of ferrous ions increased the number of oxygen vacancies on the surface of Mn_(2)O_(3),changed the local electronic structure,improved the stability of the internal lattice structure,and promoted the charge transfer and ion migration of the electrode,and provides reference for the development of functional Mn_(2)O_(3)materials.

关 键 词：Mn_(2)O_(3) 掺杂 Fe^(2+) 电容性能 

分 类 号：TQ151[化学工程—电化学工业] TM53[电气工程—电器]