A Highly-Efficient Composite Separator with Strong Ligand Interaction for High-Temperature Lithium-Ion Batteries

被引：43
|
作者：
Waqas, Muhammad [1 ,2 ]
Tan, Chao [1 ]
Lv, Weiqiang [1 ]
Ali, Shamshad [1 ]
Boateng, Bismark [1 ]
Chen, Wenjin [3 ]
Wei, Zhaohuan [1 ]
Feng, Chao [1 ]
Ahmed, Junaid [2 ]
Goodenough, John B. [4 ]
He, Weidong [1 ,5 ,6 ]
机构：
[1] Univ Elect Sci & Technol China, Sch Phys, Chengdu 611731, Sichuan, Peoples R China
[2] Sukkur IBA Univ, Dept Elect Engn, Sukkur 65200, Pakistan
[3] Univ Elect Sci & Technol, Sch Resources & Environm, Chengdu 611731, Sichuan, Peoples R China
[4] Univ Texas Austin, Texas Mat Inst, ETC 9 102, Austin, TX 78712 USA
[5] Sichuan Alpha Scenery & Green Energy Co Ltd, Chengdu, Sichuan, Peoples R China
[6] Shenzen Li S Technol Co Ltd, Shenzhen, Peoples R China
来源：
CHEMELECTROCHEM | 2018年 / 5卷 / 19期
基金：
中国国家自然科学基金;
关键词：
Colloids; high-temperature lithium-ion battery; materials science; PVDF-HFP; thermal stability; POLYMER ELECTROLYTE; POLY(VINYLIDENE FLUORIDE); ELECTROCHEMICAL PROPERTIES; POLYETHYLENE SEPARATORS; PHYSICAL-PROPERTIES; TIO2; NANOPARTICLES; GEL ELECTROLYTES; PERFORMANCE; MEMBRANE; CONDUCTIVITY;
D O I：
10.1002/celc.201800800
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
A PVDF-HFP/colloidal-TiO2 composite separator is synthesized for high-temperature lithium-ion batteries. Incorporation of colloidal TiO2 in the PVDF-HFP matrix forms a highly-uniform composite micro-structure with strong adsorption interactions between TiO2 and PVDF-HFP due to the presence of citric acid. The strong interactions are giving rise to advantageous mechanical robustness, separator/electrode interface and electrolyte uptake. The separator shows remarkable stability upon thermal treatment at 150 degrees C. With a high ionic conductivity up to 1.57 x 10(-3) Scm(-1), the LFP/Li cell with PVDF-HFP/colloidal-TiO2 composite separator delivers charge-discharge capacities of 156.95 mAhg(-1) (0.1 C) at room temperature and 120.8 mAhg(-1) (0.5 C) after annealing cells at 140 degrees C for 3 hours with a 99% capacity retention after 100 cycles. The PVDF-HFP/colloidal-TiO2 separator demonstrates promising potentials for practical applications in high-temperature environments.
引用
收藏
页码：2722 / 2728
页数：7
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