期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 3, 期 42, 页码 21277-21283出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ta05714k
关键词
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资金
- National Basic Research Program of China (973 Program) [2014CB239701]
- National Natural Science Foundation of China [21173120, 51372116]
- Natural Science Foundation of Jiangsu Province [BK2011030]
- Fundamental Research Funds for the Central Universities of NUAA [NP2014403]
- Outstanding Doctoral Dissertation in NUAA [BCXJ14-10]
- Jiangsu Innovation Program for Graduate Education [KYLX_0255]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
Hybrid sodium-ion capacitors (NICs) have tremendous potential in large-scale energy storage applications due to their low cost, long lifetime and high power. However, it remains a great challenge to find a desirable anode material with fast kinetics and superior cycle life. Here an applicable strategy to in situ grow Na2Ti3O7 on 1D CNTs as an anode material for sodium-ion capacitors is presented. Benefiting from the unique 1D nanostructure and the presence of pseudocapacitive charge storage mechanism, the Na2Ti3O7@CNT electrode exhibits excellent electrochemical performance with high rate capability and superb cycling stability. Moreover, a high performance hybrid NIC is also fabricated by using Na2Ti3O7@CNTs as an anode and activated carbon derived from the outer peanut shell as a cathode, which delivers high energy density (58.5 W h kg(-1)), high power density (3000 W kg(-1)), and long term cycle life (retaining ca. 75% of its original capacity at 0.4 A g(-1) after 4000 cycles).
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