In this study, poly(ether ether ketone) is first chloromethylated to improve the solubility and is later used for nonwoven membrane fabrication by electrospinning. Finally, the chloromethyl group was converted to the ethyl ether group and dibenzyl ether group in a hot alkaline solution. The abundant polar groups endow the membrane with excellent wettability, reducing the contact angle to 0°. The polymer matrix is crosslinked by dibenzyl ether group, endowing the membrane with excellent stability (insolubility in many solvents, and ultra-low swelling in the electrolyte at 80 °C) and good anti-shrinkage property (0% at 180 °C). The electrospinning-fabricated membrane remains stable until 4.812 V (vs. Li⁺/Li), meeting the requirement for use in lithium ion batteries. The interwoven structure of the nonwoven membrane effectively gives rise to the high electrolyte uptake of 215.8%. The ionic conductivity of the electrolyte-swelled electrospinning-fabricated membrane is 51% higher than that of the electrolyte-swelled Celgard membrane. As a result, the lithium ion battery with this nonwoven membrane exhibits an enhanced rate performance (up to 42.5% higher than the lithium ion battery with a PP separator) and satisfactory cycling performance.

在这项研究中，聚醚醚酮首先被氯甲基化以提高溶解度，随后被用于通过静电纺丝制造非织造膜。最后，在热的碱性溶液中将氯甲基基团转化为乙醚基团和二苄基醚基团。丰富的极性基团使膜具有出色的润湿性，将接触角降低至0°。聚合物基质通过二苄基醚基交联，使膜具有出色的稳定性（在许多溶剂中不溶，在80°C的电解液中超低溶胀）和良好的抗收缩性能（在180°C时为0％）。静电纺丝膜保持稳定，直到4.812 V（vs。Li ⁺/ Li），满足锂离子电池的使用要求。非织造膜的交织结构有效地引起了215.8％的高电解质吸收。电解质溶胀的电纺丝制造的膜的离子电导率比电解质溶胀的Celgard膜的离子电导率高51％。结果，具有该非织造膜的锂离子电池表现出提高的倍率性能（比具有PP隔板的锂离子电池高出42.5％）和令人满意的循环性能。