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Reduced Graphene Oxide Boosted Ultrafine Cu 2 SnS 3 Nanoparticles for High‐performance Sodium Storage
Author(s) -
Fu Lin,
Li Guocheng,
Shang Chaoqun,
Mao Eryang,
Huang Lanyan,
Wang Xiancheng,
Ma Ge,
Wang Xin,
Zhou Guofu
Publication year - 2019
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201900521
Subject(s) - graphene , materials science , oxide , nanoparticle , anode , ternary operation , chemical engineering , electrochemistry , composite number , ion , nanotechnology , electrode , composite material , metallurgy , chemistry , computer science , organic chemistry , engineering , programming language
Ternary Sn‐based sulfides have been considered as potential anode materials for sodium‐ion batteries (SIBs) due to their unique composition and high theoretical specific capacities. However, such kind of materials suffers from sluggish kinetics and huge volumetric variation resulting from the large ionic size of the sodium ions during the battery operation process. Herein, we use a facile hydrothermal method to prepare Cu 2 SnS 3 /reduced graphene oxide (CTS/RGO) composite. Characterizations reveal that CTS/RGO consists of ultrafine CTS nanoparticles with uniform and small size, which are anchored uniformly on the surface of RGO sheets. Benefited from the unique structure feature, CTS/RGO has a high reversible capacity of 566.8 mA h g −1 , good cycle stability and rate capability even at a high current density of 3200 mA g −1 , which is superior to that of bare CTS. The improved performances are ascribed to the unique structure with anchoring ultrafine CTS nanoparticles on the surface of high conductive and flexible RGO sheets, which can greatly enhance electrochemical reaction kinetics and effectively alleviate volume effect of the active materials.