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

• Published in: RSC 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
• Language: English
• Published: Cambridge Royal Society of Chemistry 01.01.2018; The Royal Society of Chemistry
• Subjects: Anodes; Chemical synthesis; Chemistry; Current density; Electrode materials; Graphene; Lithium; Lithium-ion batteries; Low conductivity; Nanocomposites; Nanocrystals; Rechargeable batteries; Tin dioxide
• ISSN: 2046-2069; 2046-2069
• DOI: 10.1039/c8ra00958a

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 ).