Oh Saewoong, Nguyen Van Hiep, Bui Van-Tien, Nam Sanghee, Mahato Manmatha, Oh Il-Kwon
National Creative Research Initiative for Functionally Antagonistic Nano-Engineering, Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea.
ACS Appl Mater Interfaces. 2020 Mar 11;12(10):11657-11668. doi: 10.1021/acsami.9b22127. Epub 2020 Feb 28.
Herein, we report a straigthforward procedure to prepare an excellent intertwined nanosponge solid-state polymer electrolyte (INSPE) for highly bendable, rollable, and foldable lithium-ion batteries (LIBs). The mechanically reliable and electrochemically superior INSPE is conjugated with intertwined nanosponge (IN) poly(vinylidene fluoride--hexafluoropropylene) (PVDF--HFP) and ion-conducting polymer electrolyte (PE) containing poly(ethylene glycol) diacrylate (PEGDA), succinonitrile (SCN) plasticizer, and lithium bis(trifluoromethanesilfonyl)imide (LiTFSI). The conjugated INSPE has both high strength with great flexibility (tensile strength of 2.1 MPa, elongation of 36.7%), and excellent ionic conductivity (1.04 × 10 S·cm, similar to the values of liquid electrolytes). As a result of such special combination, the as-prepared INSPE retains almost 100% of its ionic conductivity when subjected to many types of severe mechanical deformations. Therefore, the INSPE is successfully applied to bendable, rollable, and foldable LIBs that show excellent energy storage performance despite the intense mechanical deformations.
在此，我们报告了一种简单的方法来制备一种用于高可弯曲、可滚动和可折叠锂离子电池（LIBs）的优异交织纳米海绵固态聚合物电解质（INSPE）。机械性能可靠且电化学性能优异的INSPE由交织纳米海绵（IN）聚偏氟乙烯 - 六氟丙烯（PVDF - HFP）和包含聚乙二醇二丙烯酸酯（PEGDA）、丁二腈（SCN）增塑剂以及双（三氟甲烷磺酰）亚胺锂（LiTFSI）的离子导电聚合物电解质（PE）共轭而成。共轭INSPE兼具高强度和极大柔韧性（拉伸强度为2.1 MPa，伸长率为36.7%）以及优异的离子电导率（1.04×10 S·cm，与液体电解质的值相近）。由于这种特殊组合，所制备的INSPE在经受多种严重机械变形时，其离子电导率几乎保持100%。因此，INSPE成功应用于可弯曲、可滚动和可折叠的LIBs，尽管存在强烈机械变形，这些电池仍表现出优异的储能性能。
