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SnO 2 Functionalized Polyethylene Separator with Enhanced Thermal Stability for High Performance Lithium Ion Battery
Author(s) -
Xiang Yinyu,
Zhu Wenyi,
Qiu Weijian,
Guo Wei,
Lei Jiaheng,
Liu Dan,
Qu Deyu,
Xie Zhizhong,
Tang Haolin,
Li Junsheng
Publication year - 2018
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201702529
Subject(s) - separator (oil production) , materials science , thermal stability , electrolyte , surface modification , lithium ion battery , coating , chemical engineering , electrochemistry , ion , composite material , chemistry , electrode , battery (electricity) , organic chemistry , power (physics) , physics , quantum mechanics , engineering , thermodynamics
Improving the thermal stability and electrolyte affinity of the separator is critical for enhancing the performance of lithium ion batteries. A novel SnO 2 nanoparticle functionalized polyethylene separator prepared through a facile blade coating process is reported. The SnO 2 functionalization effectively enhances the thermal stability of the separator. The functionalized separator could withstand a temperature up to 130 °C. In addition, the novel separator shows significantly improved electrochemical performance due to its good compatibility of the SnO 2 layer with the electrolyte. As a result of these favourable features, the SnO 2 functionalized separator presents excellent battery performance. The discharge capacity of the LiCoO 2 half‐cell with the functionalized separator at 5C is improved by ∼13% at room temperature. Besides, the functionalized separator also exhibits superior discharge performance at 80 °C. These results demonstrate the high potential of the SnO 2 functionalized separator for practical lithium ion battery applications.