Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7725654 | Journal of Power Sources | 2018 | 6 Pages |
Abstract
As lithium ion batteries (LIBs) anode, SnO2 suffers fast capacity fading due to its large volume expansion during discharge/charge process. To overcome the problem, sandwich-like C@SnO2/Sn/void@C hollow spheres (referred as C@SnO2/Sn/void@C HSs) are prepared by in-situ polymerization and carbonization, using hollow SnO2 as self-template and dopamine as carbon source. The C@SnO2/Sn/void@C HSs possesses the merits of hollow and core/void/shell structure, so that they can accommodate the volume change under discharge/charge process, shorten the transmission distance of Li ions, own more contact area for the electrolyte. Thanks to these advantages, C@SnO2/Sn/void@C HSs display excellent electrochemical performance as anode materials for LIBs, which deliver a high capacity of 786.7â¯mAh gâ1 at the current density of 0.5â¯Aâ¯gâ1 after 60 cycles. The simple synthesis method for C@SnO2/Sn/void@C HSs with special structure will provide a promising method for preparing other anode materials for LIBs.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Huijun Wang, Xinya Jiang, Yaqin Chai, Xia Yang, Ruo Yuan,