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Enhanced Lithium‐Ion Storage Capability of a Bismuth Sulfide/Graphene Oxide/Poly(3,4‐ethylenedioxythiophene) Composite
Author(s) -
Mukkabla Radha,
Deepa Melepurath,
Srivastava Avanish Kumar
Publication year - 2015
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201500515
Subject(s) - graphene , materials science , poly(3,4 ethylenedioxythiophene) , pedot:pss , composite number , anode , oxide , lithium (medication) , sulfide , chemical engineering , bismuth , nickel sulfide , coating , electrode , nanotechnology , composite material , chemistry , layer (electronics) , metallurgy , medicine , endocrinology , engineering
A Bi 2 S 3 /graphene oxide (GO) composite enwrapped by a poly(3,4‐ethylenedioxythiophene) (PEDOT) coating was prepared for the first time for use as an anode in Li‐ion batteries. Pristine Bi 2 S 3 nanoflowers and composites of Bi 2 S 3 /GO and Bi 2 S 3 /GO/PEDOT were assembled into half cells with Li metal as the counter electrode, and initial discharge capacities of 833, 1020, and 1300 mAh g −1 , respectively, were obtained. Composites of Bi 2 S 3 /GO/PEDOT and Bi 2 S 3 /GO showed superior cycling stability and better rate capability than pristine Bi 2 S 3 . GO provides highly conducting interconnections, which allow facile propagation of electrons during charge/discharge, and this improves the ion‐uptake capability of the Bi 2 S 3 nanoflowers and also increases the rate capability. PEDOT furnishes a protective coating that prevents detachment of the material from the current collector during cycling, and it also imparts better cycling stability to the Bi 2 S 3 /GO/PEDOT composite.