Journal
CHEMISTRY OF MATERIALS
Volume 28, Issue 16, Pages 5753-5760Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.chemmater.6b01988
Keywords
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Funding
- Welch Foundation [F-1861]
- ACS-PRF award [55884-DNI10]
- National Program on Key Basic Research Project of China (973 Program) [2014CB239701]
- National Natural Science Foundation of China [51372116, 51504139]
- Natural Science Foundations of Jiangsu Province [BK2011030, BK20150739]
- Jiangsu Innovation Program for Graduate Education [KYLX_0255]
- Fundamental Research Funds for the Central Universities
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- [BCXJ14-10]
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Recently, hybrid ion capacitors which combine the characteristics of batteries and supercapacitors have gained great interests for large-scale energy storage applications. Here, we demonstrated a new hybrid sodium ion capacitor configuration, utilizing the niobium pentoxide (Nb2O5) and peanut shell carbon (PSC) as the anode and cathode materials, respectively. The advanced architecture of self-assembled Nb2O5 nanosheets with exceptional sodium ion storage property was obtained by carefully controlling reaction kinetics. A key finding is that the growth mechanism is demonstrated to be a process from one-dimensional nanorods to threedimensional nanocubes, and further to two-dimensional nanosheets. The resulting Nb2O5 nanosheets//PSC hybrid capacitors deliver an exceptionally high energy density (43.2 Wh kg(-1)) and high power density (5760 W kg(-1)) based on the active materials, with a long and stable cycle life (capacity retention: similar to 80% at 1280 mA g(-1) after 3000 cycles).
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