From double-helix structured seaweed to S-doped carbon aerogel with ultra-high surface area for energy storage

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Li, Daohao
Chang, Guojing
Zong, Lu
Xue, Pan
Wang, Yu
Xia, Yanzhi
Lai, Chao
Yang, Dongjiang
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2019
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Abstract

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 4037.0 m2 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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Energy Storage Materials

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17

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© 2019 Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence (http://creativecommons.org/licenses/by-nc-nd/4.0/) which permits unrestricted, non-commercial use, distribution and reproduction in any medium, providing that the work is properly cited.

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Chemical engineering

Science & Technology

Technology

Materials Science, Multidisciplinary

Materials Science

Ultra-high surface area

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Li, D; Chang, G; Zong, L; Xue, P; Wang, Y; Xia, Y; Lai, C; Yang, D, From double-helix structured seaweed to S-doped carbon aerogel with ultra-high surface area for energy storage, Energy Storage Materials, 2019, 17, pp. 22-30

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