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Gyroidal Niobium Sulfide/Carbon Hybrid Monoliths for Electrochemical Energy Storage
Author(s) -
Fleischmann Simon,
Dörr Tobias S.,
Frank Anna,
Hieke Stefan W.,
DoblasJimenez David,
Scheu Christina,
de Oliveira Peter W.,
Kraus Tobias,
Presser Volker
Publication year - 2019
Publication title -
batteries and supercaps
Language(s) - English
Resource type - Journals
ISSN - 2566-6223
DOI - 10.1002/batt.201900035
Subject(s) - materials science , sulfidation , niobium , carbon fibers , electrochemistry , electrolyte , chemical engineering , sulfide , energy storage , lithium (medication) , nanotechnology , graphene , transition metal , electrode , inorganic chemistry , catalysis , chemistry , sulfur , metallurgy , organic chemistry , composite material , composite number , medicine , power (physics) , physics , quantum mechanics , engineering , endocrinology
Abstract Transition metal dichalcogenides are attractive two‐dimensional electrode materials for electrochemical energy storage devices due to their high reversible charge storage capacity. Hybridization of these materials with carbon promises enhanced performance by facilitating the access to reactive sites and extended mechanical stabilization. Herein, we introduce a NbS 2 /C hybrid material exhibiting a gyroidal microstructure synthesized through macromolecular co‐assembly of a tailored block copolymer and an organometallic niobium precursor and subsequent sulfidation. Our synthesis allows the preparation of mechanically stable monoliths with NbS 2 nanocrystals engulfed in a highly porous carbon shell. Due to the curvature of the gyroidal structure, abundant reactive sites are exposed that lead to an attractive performance in a lithium‐containing electrolyte with a capacity of up to 400 mAh/g.