钼掺杂二氧化锰电极材料的制备及其超电性能研究

杨添铄; 王建韧; 高发明

doi:10.19799/j.cnki.2095-4239.2026.0131

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钼掺杂二氧化锰电极材料的制备及其超电性能研究

超级电容器关键材料与器件专刊 | 更新时间：2026-05-28

- 钼掺杂二氧化锰电极材料的制备及其超电性能研究
- Synthesis and supercapacitive performance of molybdenum-doped manganese dioxide electrode materials
- 储能科学与技术 2026年15卷第5期页码：1704-1715
- 作者机构：
  
  1.天津科技大学化工与材料学院，天津 300457
  2.燕山大学环境与化学工程学院，河北秦皇岛 066000
- 作者简介：
  
  杨添铄（2000—），男，博士研究生，主要研究碳基超级电容器电极的研究工作，E-mail：13011570629@163.com；
  王建韧，副教授，主要研究电容去离子方向以及水系电化学储能器件，E-mail：wangjr@ysu.edu.cn
  高发明，教授，主要研究电化学生物传感器与新能源电池等方向，E-mail：fmgao@tust.edu.cn。
- 基金信息：
  
  国家自然科学基金(22105164;22379112);河北省自然科学基金(B2025203011);河北省科技厅项目(C20230506;BJ20260701)
- DOI：10.19799/j.cnki.2095-4239.2026.0131
  中图分类号： TB 34;TM 53
- 收稿：2026-02-03，
  
  修回：2026-03-09，
  
  纸质出版：2026-05-28
- 稿件说明：
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杨添铄, 王建韧, 高发明. 钼掺杂二氧化锰电极材料的制备及其超电性能研究[J]. 储能科学与技术, 2026, 15(5): 1704-1715.

YANG Tianshuo, WANG Jianren, GAO Faming. Synthesis and supercapacitive performance of molybdenum-doped manganese dioxide electrode materials[J]. Energy Storage Science and Technology, 2026, 15(5): 1704-1715.
杨添铄, 王建韧, 高发明. 钼掺杂二氧化锰电极材料的制备及其超电性能研究[J]. 储能科学与技术, 2026, 15(5): 1704-1715. DOI： 10.19799/j.cnki.2095-4239.2026.0131.

YANG Tianshuo, WANG Jianren, GAO Faming. Synthesis and supercapacitive performance of molybdenum-doped manganese dioxide electrode materials[J]. Energy Storage Science and Technology, 2026, 15(5): 1704-1715. DOI： 10.19799/j.cnki.2095-4239.2026.0131.

摘要

本研究针对二氧化锰（MnO

）材料在超级电容器领域内难以发挥自身高能量密度与高功率密度的问题，提出了一种“自下而上”的策略以实现二者的良好平衡。本策略通过引入与[MnO

]

晶胞参数相似的[MoO

]

单元，在水热过程中扰动[MnO

]

的组装，实现MnO

结构的精确调整；通过调节[MoO

]

浓度可以精确控制所得MnO

的形貌、晶型和内部缺陷；通过SEM与TEM测试证实了[MoO

]

对MnO

形貌的改变。XPS与HRTEM结果表明[MoO

]

将引入更多氧空位与无序结构。电化学测试结果表明，适度[MoO

]

浓度材料（Mo

0.05

-MnO

）在5 mV/s的扫速下表现出158.9 F/g的比质量电容，而当扫速提升至200 mV/s时依旧能保持68%的容量。通过原位阻抗技术观测了[MoO

]

对MnO

储能过程的影响，并得到不同浓度[MoO

]

掺入MnO

电极的扩散系数。结合有限元分析，适度的[MoO

]

导致的富含缺陷但局部有序的结构平衡了活性位点数量与离子扩散平衡时间，实现功率密度与能量密度的协同增强。本研究不仅提供了一种储能表现优秀的MnO

电极材料制备方法，还揭示了MnO

电极内部的构效关系，为下一代赝电容材料的设计提供理论指导与新思路。

Abstract

The practical application of manganese dioxide (MnO

) in superc

apacitors is limited by the difficulty of concurrently achieving high energy and power density. This study addresses this limitation through a "bottom-up" structural tuning strategy in which [MoO

]

units

whose octahedral parameters closely match those of the host [MnO

]

are introduced into the MnO

lattice during hydrothermal synthesis to perturb [MnO

]

octahedral assembly and enable precise structural modification. The [MoO

]

concentration proved to be a critical parameter governing the resulting morphology

crystal phase

and defect density. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) confirmed pronounced morphological changes upon [MoO

]

incorporation

while X-ray photoelectron spectroscopy (XPS) and high-resolution TEM (HRTEM) revealed the formation of additional oxygen vacancies and a disordered local structure. Electrochemical measurements showed that the optimally doped sample (Mo

0.05

-MnO

) achieved a specific capacitance of 158.9 F/g at 5 mV/s and retained 68% of this value at 200 mV/s. The role of [MoO

]

in charge storage was further investigated by in situ electrochemical impedance spectroscopy

from which ion diffusion coefficients were determined for electrodes across a range of doping levels. Finite element analysis indicated that moderate [MoO

]

doping produces a defect-rich yet locally ordered structure that optimally balances active-site density and ion diffusion relaxation time

thereby enhancing both energy and power density simultaneously. These findings establish a viable route for synthesizing high-performance Mo-doped MnO

electrodes and clarify the underlying structure-performance relationship

offering design guidelines for advanced pseudocapacitive materials.

关键词

Keywords

references

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