Eco-friendly polyvinyl alcohol/cellulose nanofiber–Li+ composite separator for high-performance lithium-ion batteries

RSC Advances ◽  
2016 ◽  
Vol 6 (100) ◽  
pp. 97912-97920 ◽  
Author(s):  
Chuanting Liu ◽  
Ziqiang Shao ◽  
Jianquan Wang ◽  
Chengyi Lu ◽  
Zhenhua Wang
Keyword(s):  
Thermal Stability ◽  
Ionic Conductivity ◽  
Polyvinyl Alcohol ◽  
Lithium Ion Batteries ◽  
High Performance ◽  
Lithium Ion ◽  
Cellulose Nanofiber ◽  
Composite Separator

A PVA/CNF–Li composite separator presented excellent porosity, ionic conductivity, electrolyte wettability, thermal stability and remarkable cycling ability.

scholarly journals Design of A High Performance Zeolite/Polyimide Composite Separator for Lithium-Ion Batteries

Polymers ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 764 ◽  
Author(s):  
Yanling Li ◽  
Xiang Wang ◽  
Jianyu Liang ◽  
Kuan Wu ◽  
Long Xu ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Lithium Ion Batteries ◽  
Phase Inversion ◽  
High Performance ◽  
Rate Capability ◽  
Lithium Ion ◽  
Cycle Performance ◽  
Electrolyte Uptake ◽  
Composite Separator ◽  
Free Transport

A zeolite/polyimide composite separator with a spongy-like structure was prepared by phase inversion methods based on heat-resistant polyimide (PI) polymer matrix and ZSM-5 zeolite filler, with the aim to improve the thermal stability and electrochemical properties of corresponding batteries. The separator exhibits enhanced thermal stability and no shrinkage up to 180 °C. The introduction of a certain number of ZSM-5 zeolites endows the composite separator with enhanced wettability and electrolyte uptake, better facilitating the free transport of lithium-ion. Furthermore, the composite separator shows a high ionic conductivity of 1.04 mS cm−1 at 25 °C, and a high decomposition potential of 4.7 V. Compared with the PP separator and pristine PI separator, the ZSM-5/PI composite separator based LiFePO4/Li cells have better rate capability (133 mAh g−1 at 2 C) and cycle performance (145 mAh g-1 at 0.5 C after 50 cycles). These results demonstrate that the ZSM-5/PI composite separator is promising for high-performance and high-safety lithium-ion batteries.

Fabrication of co‐PVDF /modacrylic/ SiO 2 nanofibrous membrane: Composite separator for safe and high performance lithium‐ion batteries

2020 ◽  
Vol 138 (7) ◽  
pp. 49835
Author(s):  
Adel Al Rai ◽  
Elena Stojanovska ◽  
Yasin Akgul ◽  
Mohammad Mansoob Khan ◽  
Ali Kilic ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
High Performance ◽  
Lithium Ion ◽  
Nanofibrous Membrane ◽  
Composite Separator

Cross-linked fibrous composite separator for high performance lithium-ion batteries with enhanced safety

2017 ◽  
Vol 527 ◽  
pp. 129-136 ◽  
Author(s):  
Sae-Rom Park ◽  
Yun-Chae Jung ◽  
Won-Kyung Shin ◽  
Kyoung Ho Ahn ◽  
Chul Haeng Lee ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
High Performance ◽  
Fibrous Composite ◽  
Lithium Ion ◽  
Composite Separator

A phase inversion based sponge-like polysulfonamide/SiO 2 composite separator for high performance lithium-ion batteries

2018 ◽  
Vol 26 (6) ◽  
pp. 1292-1299 ◽  
Author(s):  
Xiao Wang ◽  
Gaojie Xu ◽  
Qingfu Wang ◽  
Chenglong Lu ◽  
Chengzhong Zong ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Phase Inversion ◽  
High Performance ◽  
Lithium Ion ◽  
Composite Separator

A facile method for the preparation of a high-performance, hybrid separator for use in lithium-ion batteries

2021 ◽  
pp. 004051752110066
Author(s):  
Pok Yin Wong ◽  
Chunhong Zhu ◽  
Qianyu Wang ◽  
Jian Shi ◽  
Kenji Hyodo ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Lithium Ion Batteries ◽  
High Performance ◽  
Lithium Ion ◽  
Nonwoven Fabric ◽  
Liquid Electrolyte ◽  
Thermal Shrinkage ◽  
Homogeneous Distribution ◽  
Dimensional Shape ◽  
The Difference

Polyethylene (PE) membrane has poor wettability and poor thermal stability, which results in insufficient wetting by liquid electrolytes, thermal shrinkage, and no guarantee of safety. In addition, polyethylene terephthalate (PET) nonwoven fabric has inhomogeneous pores and no shutdown function. Therefore, it may cause some problems for independent use, either in the assembly or in usage. In this study, a hybrid separator used in lithium-ion batteries was investigated. The separator was fabricated by laminating a PE membrane and PET nonwoven fabric with or without a ceramic coating on the PET nonwoven. The morphology, wettability, thermal stability, and battery performance were evaluated, and the results showed that the homogeneous distribution of pores can be obtained from the hybrid separators. The wettability properties were also improved in terms of contact angle, liquid electrolyte absorption height, and the decrease in the spreading area. Moreover, with laminated PET nonwoven fabric, the hybrid separators kept the dimensional shape at 180°C for 1 hour of heating, but the PE membrane shrank and became a small wad. The difference between the shutdown and meltdown temperatures ensured that the battery was safe to use. In addition, the evaluation of the battery’s performance indicated that the hybrid separators can be used instead of a PE membrane. This study showed a facile method for the preparation of a hybrid composite separator with improved wettability, thermal stability, and safety for lithium-ion batteries, and it has the potential to be used extensively in the future.

scholarly journals Tailored Solid Polymer Electrolytes by Montmorillonite with High Ionic Conductivity for Lithium-Ion Batteries

2019 ◽  
Vol 14 (1) ◽  
Author(s):  
Yingjian Zhao ◽  
Yong Wang
Keyword(s):  
Ionic Conductivity ◽  
Lithium Ion Batteries ◽  
Polymer Electrolytes ◽  
High Performance ◽  
Lithium Ion ◽  
Lewis Base ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer ◽  
Lithium Ions ◽  
High Discharge Capacity

AbstractPolyethylene oxide (PEO)-based solid polymer electrolytes (SPEs) have important significance for the development of next-generation rechargeable lithium-ion batteries. However, strong coordination between lithium ions and PEO chains results the ion conductivity usually lower than the expectation. In this study, sub-micron montmorillonite is incorporated into the PEO frames as Lewis base center which enables the lithium ions to escape the restraint of PEO chains. After involving montmorillonite (MMT) into the SPEs, the ionic conductivity of SPEs is 4.7 mS cm− 1 at 70 °C which shows a comparable value with that of liquid electrolyte. As coupling with LiFePO4 material, the battery delivers a high discharge capacity of 150.3 mAh g− 1 and an excellent rate performance with a capacity of 111.8 mAh g− 1 at 0.16 C and maintains 58.2 mAh g− 1 at 0.8 C. This study suggests that the customized incorporation of Lewis base materials could offer a promising solution for achieving high-performance PEO-based solid-state electrolyte.

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