Preparation of Mn3O4 nanoparticles at room condition for supercapacitor application

Preparation of Mn3O4 nanoparticles at room condition for supercapacitor application
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室温下制备用于超级电容器的Mn3O4纳米颗粒

DOI:
10.1016/j.powtec.2012.10.010
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发表时间:
2013-02
期刊:
影响因子:
5.2
通讯作者:
杨刚
杨刚
中科院分区:
工程技术2区
文献类型:
--
作者:
杨刚

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本文通过超声波和常温水解法成功地合成了高比电容的四氧化三锰。晶体结构、物相和电化学性能与制备条件有关,如超声时间、反应温度、所用有机溶剂等,讨论了超声时间和各种溶剂的存在对Mn3O4晶体生长机理和改善超级电容器性能的影响。在室温下超声处理6h,可得到接近100%的Mn3O4纳米粒子,具有较高的比电容(在0.4Ag−1时为261fg−1,在40Ag−1时为140fg−1)以及良好的循环寿命。高产率和在室温下方便的合成路线使过渡金属氧化物的生产很容易放大,用于电化学应用。
In this work, high specific capacitance of Mn3O4is successfully synthesized via ultrasonic and hydrolyzation at room temperature. The crystal structure, phase and the electrochemical performance are dependent on the preparation conditions, such as ultrasonic time, reaction temperature, and the organic solvent used, etc. The effect of ultrasonic time and the presence of various solvents are well discussed in the crystal growth mechanism and improved supercapacitor performance of Mn3O4. The almost 100% yielded Mn3O4nanoparticles via ultrasonication for 6h at room temperature exhibit high specific capacitances (261Fg−1at 0.4Ag−1and 140Fg−1at 40Ag−1) as well as excellent cycle life. The high yield and convenient synthetic route at room temperature make readily scaled-up production of transition metal oxides for electrochemical applications.
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