化学
电解质
化学工程
纤维素
润湿
锂离子电池
锂(药物)
膜
纳米复合材料
无机化学
电池(电)
有机化学
电极
医学
功率(物理)
物理
生物化学
物理化学
量子力学
工程类
内分泌学
作者
Jiajin Zhang,Zixuan Zhang,Tong Wu,Xiaogang Luo
标识
DOI:10.1016/j.jelechem.2023.117708
摘要
Commercial separators result in poor lithium battery performance due to low electrolyte wettability and non-selective ion transport. In this work, the cellulose membrane with excellent electrolyte wettability was selected as the skeleton, and the MOF nanoparticles were added by the blending method. The composite cellulose membrane with uniform pore size was prepared by casting process. The cellulose membrane skeleton promoted the absorption of electrolytes. The Lewis acid sites presented in UiO-66 facilitated the dissociation of lithium salts by attracting PF6− anions. The OMS (open metal site) provided by UiO-66(Ce) further adsorbs anions and solvent molecules, effectively regulated ion transport, maintained a stable and efficient cycle life, and reduced lithium dendrite deposition. The LiFePO4/Li equipped with UiO-66/CM showed a capacity retention rate of 71.70%, while the LiFePO4/Li equipped with UiO-66 (Ce)/CM showed a capacity retention rate of 93.80 % after 200 cycles at 0.5C. Therefore, the developed strategy may provide a powerful way to improve electrolyte wettability and effectively regulate ion transport.
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