Journal
NANOSCALE
Volume 8, Issue 1, Pages 626-633Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5nr05978j
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Funding
- National Nature Science Foundation of China [51325202]
- Natural Science Foundation of China [NSFC 11272109]
- PhD. Programs Foundation of Ministry of Education of China [20122302110065]
- Beijing National Laboratory for Molecular Sciences (BNLMS) [NSFC 21301039, HIT.NSRIF.2011096]
- Promotive Research Fund for Young and Middle-aged Scientists of Shandong Province [BS2013HZ021]
- Technology and Development Program of Weihai
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Pseudo-materials are effective in boosting the specific capacitance of supercapacitors, but during service their degradation may also be very strong, causing reduced cycling stability. Here, we show that a carbon nanotube sponge grafted by two conventional pseudo-polymer layers in sequence can serve as a porous supercapacitor electrode with significantly enhanced cycling stability compared with single polymer grafting. Creating conformal polymer coatings on the nanotube surface and the resulting double-sheath configuration are important structural factors leading to the enhanced performance. Combining different polymers as double sheaths as reported here might be a potential route to circumvent the dilemma of pseudo-materials, and to simultaneously improve the capacitance and stability for various energy storage devices.
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