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Capacitance and voltage matching between MnO2 nanoflake cathode and Fe2O3 nanoparticle anode for high-performance asymmetric micro-supercapacitors
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  • 分类:TM53[电气工程—电器] P444[天文地球—大气科学及气象学]
  • 作者机构:[1]State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China, [2]Department of Chemistry, University of California, Berkeley, CA 94720, USA
  • 相关基金:This work was supported by the National Key Research and Development Program of China (No. 2016YFA0202603), the National Basic Research Program of China (No. 2013CB934103), the Programme of Introducing Talents of Discipline to Universities (No. B17034), the National Natural Science Foundation of China (Nos. 51521001, 51502227, 51579198, and 51302203), the National Natural Science Fund for Distinguished Young Scholars (No. 51425204), and the Fundamental Research Funds for the Central Universities (WUT: 2016III001, 2016III005, 2016III006).
中文摘要:

象在使小型化的电子设备的精力存储单位潜在的平面 micro-supercapacitors 表演伟人。不对称的结构广泛地在 micro-supercapacitors 被调查了,并且基于碳的材料通常在电极被使用。在 micro-supercapacitors 在两个电极集成不同金属氧化物,批评挑战是配对不同感应电的金属氧化物。此处,我们建议匹配充分集成于由一个灵巧、可控制的制造过程的一高效的不对称的 micro-supercapacitor 的二感应电的材料的电压和电容的策略。制作 micro-supercapacitors 作为积极活跃材料和 Fe 22> O 3 作为否定活跃材料分别地。平面不对称的 micro-supercapacitors 拥有 60 F 的一个高电容??

英文摘要:

Planar micro-supercapacitors show great potential as the energy storage unit in miniaturized electronic devices. Asymmetric structures have been widely inves- tigated in micro-supercapacitors, and carbon-based materials are commonly applied in the electrodes. To integrate different metal oxides in both electrodes in micro-supercapacitors, the critical challenge is the pairing of different faradic metal oxides. Herein, we propose a strategy of matching the voltage and capadtance of two faradic materials that are fully integrated into one high-performance asymmetric micro-supercapacitor by a facile and controllable fabrication process. The fabricated micro-supercapacitors employ MnO2 as the positive active material and Fe203 as the negative active material, respectively. The planar asymmetric micro-supercapacitors possess a high capacitance of 60 F-cm-3, a high energy density of 12 mW.h.cm-3, and a broad operation voltage range up to 1.2 V.

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