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SnO 2 /Graphene Nanocomposite Coated by Carbonized Polyacrylic Acid Hydrogel as a High‐Performance Anode for Lithium‐Ion Batteries
Author(s) -
Wang Fei,
Cheng Tingting,
Zong Jingui,
Zhao Mingshu,
Yang Sen,
Song Xiaoping
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201901479
Subject(s) - materials science , nanocomposite , graphene , polyacrylic acid , anode , carbonization , lithium (medication) , chemical engineering , oxide , nanoparticle , tin oxide , in situ polymerization , carbon fibers , polymerization , nanotechnology , composite material , composite number , polymer , electrode , chemistry , scanning electron microscope , medicine , endocrinology , engineering , metallurgy
Abstract Tin oxide is regarded as one of the most promising anode materials for lithium‐ion batteries. However, the large volume change and low electrical conductivity during charge‐discharge process hinder its practical application. In this work, carbon‐coated SnO 2 /graphene nanocomposite is synthesized by in‐situ polymerization of acrylic acid monomer and in‐situ carbonization of polyacrylic acid hydrogel on the surface of three‐dimensional porous structure SnO 2 /graphene. This unique structure ensures the stable combination of SnO 2 nanoparticles with graphene and simultaneously avoids the agglomeration of SnO 2 nanoparticles. Thus, the nanocomposite exhibits stable structure and excellent ionic/electronic conductivity during long‐term lithiation/delithiation process. The discharge capacity of carbon‐coated SnO 2 /graphene nanocomposite remains at 968 mAh g −1 after 50 cycles at 100 mA g −1 and 480 mAh g −1 after 500 cycles at 1000 mA g −1 , which exhibits a significant improvement in both cyclability and rate capability for SnO 2 ‐based anode materials.