Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 55, Issue 51, Pages 15925-15928Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201610301
Keywords
aerogel; carrageenan; double-helix structure; metal sulfides; sodium-ion batteries
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Funding
- National Natural Science Foundation of China [51473081, 51672143, 51671003]
- National Key Research and Development Program of China [2016YFB0100201]
- South China University of Technology (SCUT)
- Fundamental Research Funds for the Central Universities from SCUT
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The metal sulfide-carbon nanocomposite is a new class of anode material for sodium ion batteries, but its development is restricted by its relative poor rate ability and cyclic stability. Herein, we report the use of double-helix structure of carrageenan-metal hydrogels for the synthesis of 3D metal sulfide (MxSy) nanostructure/carbon aerogels (CAs) for high-performance sodium-ion storage. The method is unique, and can be used to make multiple MxSy/CAs (such as FeS/CA, Co9S8/CA, Ni3S4/CA, CuS/CA, ZnS/CA, and CdS/CA) with ultra-small nanoparticles and hierarchical porous structure by pyrolyzing the carrageenan-metal hydrogels. The as-prepared FeS/CA exhibits a high reversible capacity and excellent cycling stability (280mAh(-1) at 0.5Ag(-1) over 200cycles) and rate performance (222mAh(-1) at 5Ag(-1)) when used as the anode material for sodium-ion batteries. The work shows the value of biomass-derived metal sulfide-carbon heterostuctures in sodium-ion storage.
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