Abstract
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.
Original language | English |
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Pages (from-to) | 53-60 |
Number of pages | 8 |
Journal | Energy Storage Materials |
Volume | 6 |
DOIs | |
Publication status | Published - 2017 Jan 1 |
Keywords
- Energy storage
- Hybrid supercapacitor
- Manganese oxide
- Microstructure
- Porous carbon
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Materials Science(all)
- Energy Engineering and Power Technology