The Effect of Different Ratios of Malonic Acid to Plyvinylalcohol on Electrochemical and Mechanical Properties of Polyacrylonitrile Electrospun Separators in Lithium-Ion Batteries

Fartash Khodaverdi,Mehran Javanbakht,Ali Vaziri,Mehdi Jahanfar

doi:10.3311/ppch.17904

Abstract

The present study aimed to investigate the mechanical, thermal, and electrochemical properties of Polyacrylonitrile (PAN) electrospun separators in the presence of Polyvinylalcohol (PVA) hydrophilic materials and Malonic Acid (MA) crosslinker inside the lithium-ion batteries. The results showed that the M3 modified separator with the MA to PVA+MA (wt./wt.) optimum ratio of 37.5 % had the best performance in all tests. This separator had a value of 3.16 mS/cm in the ion conductivity test. Additionally, it had an electrolyte uptake of 1172 % (2.39 times more than the neat PAN separator) and thermal shrinkage of 7.4 % at 180 °C, where this value was 14.5 % for neat PAN separator at the same experimental condition. Furthermore, the acceptable performance in the battery performance tests was compared with other separators.

Highlights

Considerable research attention has been paid to the fundamental need for clean energy and novel approaches for decreasing the emission of deleterious greenhouse gasses [1, 2]
The present study aimed to investigate the mechanical, thermal, and electrochemical properties of Polyacrylonitrile (PAN) electrospun separators in the presence of Polyvinylalcohol (PVA) hydrophilic materials and Malonic Acid (MA) crosslinker inside the lithium-ion batteries
As expected, when the MA was prepared to react with PAN/PVA, the carboxylic groups (COOH) in MA react with the hydroxyl groups (OH) in the PVA forming ester linkages

Summary

Introduction

Considerable research attention has been paid to the fundamental need for clean energy and novel approaches for decreasing the emission of deleterious greenhouse gasses [1, 2]. Abstract The present study aimed to investigate the mechanical, thermal, and electrochemical properties of Polyacrylonitrile (PAN) electrospun separators in the presence of Polyvinylalcohol (PVA) hydrophilic materials and Malonic Acid (MA) crosslinker inside the lithium-ion batteries. Zhu et al [10] investigated PAN/PVDF separators to find the best separator with suitable mechanical, thermal, and dimensional resistance in lithium-ion batteries.

Results

Conclusion