Journal
CARBOHYDRATE POLYMERS
Volume 227, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2019.115346
Keywords
Carboxymethyl cellulose; Bacterial cellulose; Polysaccharides; Hierarchical porous carbon; Supercapacitor
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Funding
- National Natural Science Foundation of China [21675125, 21975203]
- Shaanxi Science and Technology Project [2019KW-041]
- Fundamental Research Funds for the Central Universities [300102228502]
- Amygdalus pedunculata Engineering Technology Research Center of State Forestry Administration
- Key laboratory of Yulin Desert Plants Resources
- Japan Society for the Promotion of Science [17H03114]
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This study reports excellent supercapacitor performance of hierarchical composite porous carbon (HPC) materials successfully fabricated by one-step carbonization and activation process derived from polysaccharides carboxymethyl cellulose, bacterial cellulose, and citric acid. The resultant HPC displayed unique porous nanosheet morphology with high specific surface area (2490 m(2) g(-1)) and rich oxygen content (7.3%). The developed structures with macropores, mesopore walls, micropores, and high oxygen content led to excellent electrochemical performance for electrode of electric double-layer capacitors (EDLCs). In a three-electrode system, the HPC electrode showed a high specific capacitance of 350 F g(-1), good rate performance, and excellent cycling stability. The energy density of supercapacitor based on HPC was comparable to or higher than that of commercially supercapacitors. More importantly, two series-wound devices were easy to light light-emitting diode (LED, 3.0 V). These results suggest that the current material is a promising candidate for low-cost and ecofriendly energy storage devices.
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