石英晶体微天平分析不同介孔二氧化锰材料的电化学性能

引用本文: 李家玉, 齐力, 王宏宇. 石英晶体微天平分析不同介孔二氧化锰材料的电化学性能[J]. 分析化学, 2017, 45(4): 560-564. doi: 10.11895/j.issn.0253-3820.160599 shu

Citation: LI Jia-Yu, QI Li, WANG Hong-Yu. Analysis of Electrochemical Performances of Different Mesoporous Manganese Dioxide Materials by Quartz Crystal Microbalance[J]. Chinese Journal of Analytical Chemistry, 2017, 45(4): 560-564. doi: 10.11895/j.issn.0253-3820.160599 shu

石英晶体微天平分析不同介孔二氧化锰材料的电化学性能

1.
中国科学院长春应用化学研究所电分析化学国家重点实验室, 长春 130022;
2.
中国科学技术大学, 合肥 230026
基金项目:
本文系国家自然科学基金（No.21571173）和国家重点基础研究发展计划项目（No.2012CB932800）资助

摘要: 以碳酸锰（MnCO₃）为前体，空气氛围下采用不同温度（300℃、350℃、400℃）煅烧，制备了3种介孔二氧化锰（MnO₂）材料，分别与粘结剂混合喷涂至石英晶片作为电极，利用石英晶体微天平（QCM）监测了3种材料在0.1 mol/L Na₂SO₄溶液中随循环伏安过程的电化学性能变化。分析结果表明，3种材料在首圈循环中都呈现出显著的质量增加，发生了不可逆反应过程；300℃煅烧制备的MnO₂材料具备更好的电化学稳定性和容量保持能力。将300℃，350℃和400℃煅烧的MnO₂各自作为正极与活性炭负极组成超级电容器，进行充放电测试，首圈均有35%-40%的容量损失；三者稳定循环时放电容量分别为15.9，12.9和11.7 mA h/g。QCM的分析与充放电测试结果相一致，表明QCM可用于比较不同介孔二氧化锰材料的电化学性能。

关键词:

English

Analysis of Electrochemical Performances of Different Mesoporous Manganese Dioxide Materials by Quartz Crystal Microbalance

1.
State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;
2.
University of Science and Technology of China, Hefei 230026, China
Received Date: 11 August 2016
Revised Date: 12 December 2016
Fund Project:
This work was supported by the National Natural Science Foundation of China (No. 21571173) and the National Basic Research Program of China (No. 2012CB932800)

Abstract: The mesoporous manganese dioxide (MnO₂) materials were synthesized by the calcinations of manganese carbonate (MnCO₃) precursors in air atmosphere at 300, 350 and 400℃. The slurries of MnO₂ and binder were sprayed on the quartz electrodes. Quartz crystal microbalance (QCM) was conducted with cyclic voltammetry to analyze the electrochemical behaviors of the three MnO₂ samples in 0.1 mol/L sodium sulfate (Na₂SO₄). The mass of the three samples were generally increased during potential cycling, especially in the first stage, which suggested that an irreversible reaction process occurred. The as-synthesized MnO₂ at 300℃ had the better electrochemical stability and capacity retentivity. The three materials were assembled to (-) active carbon/MnO₂ (+) supercapacitors and the charge-discharge tests were conducted. The results showed that 35%-40% capacity loss was occurred in the initial cycling, and the total discharge capacities of MnO₂ formed at 300℃, 350℃, 400℃ were 15.9, 12.9, 11.7 mA h/g, respectively. The detection results of QCM method were consistent with that of the charge-discharge tests, suggesting that this QCM method could be used for distinguishing the electrochemical performance of mesoporous MnO₂ materials.

Key words:

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石英晶体微天平分析不同介孔二氧化锰材料的电化学性能

English

Analysis of Electrochemical Performances of Different Mesoporous Manganese Dioxide Materials by Quartz Crystal Microbalance

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

石英晶体微天平分析不同介孔二氧化锰材料的电化学性能

English

Analysis of Electrochemical Performances of Different Mesoporous Manganese Dioxide Materials by Quartz Crystal Microbalance

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

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CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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