High thermal resistance polyimide separators prepared via soluble precusor and non-solvent induced phase separation process for lithium ion batteries

2016 ◽  
Vol 187 ◽  
pp. 125-133 ◽  
Author(s):  
Hong Zhang ◽  
Chun-Er Lin ◽  
Ming-Yong Zhou ◽  
Angelin Ebanezar John ◽  
Bao-Ku Zhu
Keyword(s):  
Phase Separation ◽  
Thermal Resistance ◽  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Separation Process ◽  
Phase Separation Process ◽  
High Thermal Resistance

Preparation of porous fluorinated polyimide separator for lithium-ion batteries by non-solvent induced phase separation process

2021 ◽  
pp. 095400832098815
Author(s):  
Yake Shi ◽  
Biao Yuan ◽  
Yanzhen He ◽  
Cuijia Duan ◽  
Shuo Yan ◽  
...  
Keyword(s):  
Phase Separation ◽  
Lithium Ion Batteries ◽  
High Performance ◽  
Retention Rate ◽  
Lithium Ion ◽  
Promising Candidate ◽  
Fluorinated Polyimide ◽  
Electrolyte Uptake ◽  
Phase Separation Process ◽  
Interconnected Structure

A series of novel porous fluorinated polyimide (FPI) separators containing trifluoromethyl group (–CF3) were prepared by the non-solvent induced phase separation (NIPS) strategy. The prepared FPI separator with 60% molar content (fluorinated dianhydride: non-fluorinated dianhydride: diamine = 60: 40: 100) of fluorinated groups (FPI-60%) could stably exist in the electrolyte as a LIBs separator. The resultant FPI-60% separator possesses high thermal stability with the Tg of 289.4°C and exhibits no shrinkage even at 200°C. The morphologies of the FPI-60% separators were adjusted by introducing small molecular non-solvent additives-ethanol, and the FPI-60% separators present the spongy-like and interconnected structure with different porosity as the amount of ethanol changed from 1 wt% to 10 wt%. The FPI-60% separators display excellent electrolyte uptake with 170%–200% and the ionic conductive could reach 1.17 mS/cm which is four times approximately than that of the PP separator. The lithium-ion batteries (LIBs) using FPI-60% separators with 10 wt% ethanol added show better rate capacities (102.8 mAh/g, 70.8 mAh/g of PI-10 and PP separator at 2 C, respectively) and the capacity retention rate is 93.2% after 50 cycles. The results prove that the porous FPI separator is a promising candidate for high-performance LIBs.

scholarly journals Parameter optimization and yield prediction of cathode coating separation process for direct recycling of end-of-life lithium-ion batteries

RSC Advances ◽  
2021 ◽  
Vol 11 (39) ◽  
pp. 24132-24136
Author(s):  
Liurui Li ◽  
Tairan Yang ◽  
Zheng Li
Keyword(s):  
Lithium Ion Batteries ◽  
End Of Life ◽  
Lithium Ion ◽  
Separation Process ◽  
Yield Prediction ◽  
Li Ion Batteries ◽  
Treatment Efficiency ◽  
Control Factors ◽  
Li Ion ◽  
Pre Treatment

The pre-treatment efficiency of the direct recycling strategy in recovering end-of-life Li-ion batteries is predicted with levels of control factors.

Re-enactment of retrieving lithium ion batteries by sensor ore and magnetic separation process

2020 ◽  
Author(s):  
R. A. Sunmati ◽  
S. V. Tarini ◽  
S. Pooja ◽  
V. Swetha ◽  
S. Thaarini ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Magnetic Separation ◽  
Lithium Ion ◽  
Separation Process
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