Journal
ENERGY STORAGE MATERIALS
Volume 17, Issue -, Pages 22-30Publisher
ELSEVIER
DOI: 10.1016/j.ensm.2018.08.004
Keywords
Ultra-high surface area; Carbon aerogel; Biomass; Lithium-sulfur battery; Supercapacitor
Funding
- National Natural Science Foundation of China [51473081, 51672143, 81502246, 51572116]
- Outstanding Youth of Natural Science in Shandong Province [JQ201713]
- ARC Discovery Project [170103317]
- Key Research and Development Program of Shandong Province [2017GSF18128]
- Taishan Scholars Program
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A sustainable biomass conversion and green strategy, using red algae derived carrageenan-Fe hydrogel as precursor, is developed to fabricate the 3D hierarchical macro-meso-microporous sulfur-doped carbon aerogel (HPSCA) with tunable nanopores and ultra-high surface area up to 4037.0m(2) g(-1). The molecular-level dispersions of Fe3+ ions in carrageenan contribute to the ultra-high surface area of HPSCA after carbonization, acid washing and activation process. The attracting structure features make it an applicable candidate material in lithium-sulfur (Li-S) batteries and double-layer supercapacitors (SCs). The highly developed porous structure of HPSCA can accommodate more sulfur (up to 80 wt%) to produce high-energy composite cathode with high specific capacity, cycle stability and long cycle life (400 cycles) in Li-S batteries. Meanwhile, HPSCA can present high specific capacitance of 335 and 217 F g(-1) (1 A g(-1)) in the aqueous and organic electrolyte. Superior rate performance also can be obtained, and high capacitance of 204 F g(-1) at 100 A g(-1) and 173 F g(-1) at 50 A g(-1) in aqueous and organic electrolytes, respectively, is retained.
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