Design and synthesis of graphene/SnO2/polyacrylamide nanocomposites as anode material for lithium-ion batteries

Tin dioxide (SnO 2 ) is a promising anode material for lithium-ion batteries owing to its large theoretical capacity (1494 mA h g −1 ). However, its practical application is hindered by these problems: the low conductivity, which restricts rate performance of the electrode, and the drastic volume ch...

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Published inRSC advances Vol. 8; no. 21; pp. 11744 - 11748
Main Authors Wan, Yuanxin, Wang, Tianyi, Lu, Hongyan, Xu, Xiaoqian, Zuo, Chen, Wang, Yong, Teng, Chao
Format Journal Article
LanguageEnglish
Published Cambridge Royal Society of Chemistry 01.01.2018
The Royal Society of Chemistry
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Summary:Tin dioxide (SnO 2 ) is a promising anode material for lithium-ion batteries owing to its large theoretical capacity (1494 mA h g −1 ). However, its practical application is hindered by these problems: the low conductivity, which restricts rate performance of the electrode, and the drastic volume change (400%). In this study, we designed a novel polyacrylamide/SnO 2 nanocrystals/graphene gel (PAAm@SnO 2 NC@GG) structure, in which SnO 2 nanocrystals anchored in three-dimensional graphene gel network and the polyacrylamide layers could effectively prevent the agglomeration of SnO 2 nanocrystals, presenting excellent cyclability and rate performance. A capacity retention of over 90% after 300 cycles of 376 mA h g −1 was achieved at a current density of 5 A g −1 . In addition, a stable capacity of about 989 mA h g −1 at lower current density of 0.2 A g −1 was achieved. Tin dioxide (SnO 2 ) is a promising anode material for lithium-ion batteries owing to its large theoretical capacity (1494 mA h g −1 ).
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These authors contributed equally to this work.
ISSN:2046-2069
2046-2069
DOI:10.1039/c8ra00958a