Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5147622 | International Journal of Hydrogen Energy | 2017 | 9 Pages |
Abstract
Polyethylene oxide (PEO)-coated hollow SnNi nanospheres (SnNi@PEO) and hollow SnNi nanospheres were obtained by a galvanic replacement method using Ni nanospheres as the sacrificial template association with surfactant (sodium dodecyl sulfate, SDS). Compared with hollow SnNi nanospheres and solid Sn nanospheres, the obtained SnNi@PEO were applied for the first time in lithium ion batteries (LIBs) and showed better electrochemical properties (reversible capacity of 560 mAh gâ1 after 100 cycles with a coulomb efficiency above 98%). The excellent electrochemical performance of SnNi@PEO can be ascribed to hollow structure and PEO coating to alleviate volume expansion. To further comprehending of the mechanical stability, a diffusion-stress coupled model was solved numerically to simulate the diffusion-induced stress evolution of the single sphere during the lithiation process in LIBs.
Keywords
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Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Meiqing Guo, Xiaogang Zhang, Zhongchao Bai, Jiaye Ye, Weijia Meng, Hui Song, Zhihua Wang,