title: Double-Helix Structure in Carrageenan-Metal Hydrogels: A General Approach to Porous Metal Sulfides/Carbon Aerogels with Excellent Sodium-Ion Storage.
abstract: 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 (280 mA h-1at 0.5 A g-1over 200 cycles) and rate performance (222 mA h-1at 5 A g-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.
authors.affiliation: Collaborative Innovation Center for Marine Biomass Fibers Materials and Textiles of Shandong Province, Institute of Marine Biobased Materials, School of Environmental Science and Engineering, Qingdao University, Qingdao, 266071, P.R. China.
authors.forename: Daohao
authors.initials: D
authors.lastname: Li
authors.affiliation: Collaborative Innovation Center for Marine Biomass Fibers Materials and Textiles of Shandong Province, Institute of Marine Biobased Materials, School of Environmental Science and Engineering, Qingdao University, Qingdao, 266071, P.R. China.
authors.forename: Dongjiang
authors.initials: D
authors.lastname: Yang
authors.affiliation: Analytical and Testing Centre, South China University of Technology, Guangzhou, 510640, China.
authors.forename: Xianfeng
authors.initials: X
authors.lastname: Yang
authors.affiliation: Collaborative Innovation Center for Marine Biomass Fibers Materials and Textiles of Shandong Province, Institute of Marine Biobased Materials, School of Environmental Science and Engineering, Qingdao University, Qingdao, 266071, P.R. China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Wang
authors.affiliation: College of Science, China University of Petroleum, Qingdao, 266580, P.R. China.
authors.forename: Ziqi
authors.initials: Z
authors.lastname: Guo
authors.affiliation: Collaborative Innovation Center for Marine Biomass Fibers Materials and Textiles of Shandong Province, Institute of Marine Biobased Materials, School of Environmental Science and Engineering, Qingdao University, Qingdao, 266071, P.R. China.
authors.forename: Yanzhi
authors.initials: Y
authors.lastname: Xia
authors.affiliation: Collaborative Innovation Center for Marine Biomass Fibers Materials and Textiles of Shandong Province, Institute of Marine Biobased Materials, School of Environmental Science and Engineering, Qingdao University, Qingdao, 266071, P.R. China.
authors.forename: Shenglei
authors.initials: S
authors.lastname: Sun
authors.affiliation: Department of Materials Science and Engineering, The Beijing Innovation Center for Engineering Science and Advanced Technology, Key Laboratory of Theory and Technology of Advanced Batteries Materials, Department of Energy and Resources Engineering, College of Engineering, Peking University, Beijing, 100871, China.
authors.forename: Shaojun
authors.identifier: 0000-0002-5941-414X
authors.initials: S
authors.lastname: Guo
keywords: aerogel; carrageenan; double-helix structure; metal sulfides; sodium-ion batteries