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Electrochemical Behavior of Polypyrrole‐modified SnS 2 for Use as Anode Material in Lithium‐Ion Batteries
Author(s) -
Luo Dawei,
Lin Feng,
Xiao Wangdong,
Li Zhijun,
Luo Chaoyun,
Li Xue
Publication year - 2016
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.201500491
Subject(s) - polypyrrole , electrochemistry , anode , chemistry , lithium (medication) , scanning electron microscope , chemical engineering , electrode , microstructure , conductivity , nanoparticle , nanotechnology , materials science , composite material , crystallography , medicine , engineering , endocrinology
SnS 2 /polypyrrole ( PPy) composites were successfully synthesized by PPy modification of SnS 2 via a simple and effective solvothermal and chemical method. The microstructure, morphology, electrical conductivity, PPy content, and electrochemical properties of these materials were characterized by X‐ray diffraction ( XRD ), scanning electron microscopy ( SEM ), four‐point probe technique, thermogavimetry ( TG ), and constant‐current charge/discharge tests, respectively. The results demonstrate that PPy is tightly coated on the 3D flower‐like SnS 2 and that the conductivity of SnS 2 / PPy composites can be greatly improved by the PPy modification. The electrochemical results indicate that PPy is not involved in the electrode reaction, but it can dramatically improve the reversible capacity and cyclic performance. The recharge capacity retention after 30 cycles remained at 523 mAh /g, which is significantly higher than that of SnS 2 without modification by PPy . The better cycling performance compared to SnS 2 nanoparticles should be due to the 3D nano‐flower‐like SnS 2 particles and the modification of SnS 2 by PPy .