Journal
RSC ADVANCES
Volume 5, Issue 39, Pages 30963-30969Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ra02663f
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Funding
- Shenzhen Peacock Plan Program [KQCX20140521144358003]
- National Nature Science Foundations of China [21303162]
- International Collaboration Program of Shenzhen [GJHZ20130411141529167]
- Fundamental research plan of Shenzhen [JCYJ20140417172417144]
- Innovative group for high-performance lithium-ion power batteries R&D and industrialization of Guangdong Province [2013N079]
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Facile synthesis of porous and hollow spinel materials is highly desirable for their extensive applications in energy storage fields. In this work, uniform and decentralized flower-like CoMn2O4 microspheres were synthesized and characterized for supercapacitor electrodes in neutral aqueous electrolyte. In this contribution, uniform microsphere precursors were firstly fabricated by a solvothermal method, followed by a low temperature calcination process for crystallization. A detailed study shows that the deionized (DI) water content plays an important role in the solvothermal process to optimize the morphology of the microspheres. In 1 M Na2SO4, the spinel electrode material has a working potential window as high as 1.1 V and a specific capacitance of 188 F g(-1). Besides, the electrode material exhibits excellent cycling stability by retaining 93% of its original capacitance after 1000 cycles. Therefore, the flower-like microspheres of CoMn2O4 spinel are promising candidates for supercapacitor applications.
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