Coupling effect between ultra-small Mn<sub>3sub>O<sub>4sub> nanoparticles and porous carbon microrods for hybrid supercapacitors
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- 作者：Rutao Wang<sup>asup><sup> ; sup><sup>bsup> ; Pan Liu<sup>csup> ; Junwei Lang<sup>asup> ; Li Zhang<sup>bsup><sup> ; sup><sup>lizhang@mae.cuhk.edu.hksup> ; Xingbin Yan<sup>asup><sup> ; sup><sup>xbyan@licp.cas.cnsup>
- 关键词：Hybrid supercapacitor ; Manganese oxide ; Porous carbon ; Microstructure ; Energy storage
- 刊名：Energy Storage Materials
- 出版年：2017
- 出版时间：January 2017
- 年：2017
- 卷：6
- 期：Complete
- 页码：53-60
- 全文大小：1563 K
- 卷排序：6
文摘
Hybrid supercapacitor, which is an energy storage device that combines a low-energy/fast double-layer electrode and a high-energy/sluggish faradaic redox electrode, could realize further gains in energy/power density if the capacity and rate gaps of the two electrodes are properly balanced. Herein, a microrod-like architecture that incorporates Mn3O4 nanoparticles on/in highly porous carbon rods (PCR) scaffold (denoted as Mn-PCR composite) is designed for this purpose. The optimized Mn-PCR composite exhibits large Li-ion storage capacity and fast charge/discharge rate, mainly stemming from its distinct microrod-like architecture and porous structure. We then employ Mn-PCR composite as the anode and PCR as the cathode to fabricate a hybrid supercapacitor, which yields an ultrahigh energy density of 174 W h kg−1 at 200 W kg−1 and retains 74.5 W h kg−1 at a high power density of 10 kW kg−1.