Supramolecular Thixotropic Ionogel Electrolyte for Sodium Batteries

Gels

Yubin Ke¹  Xiaoji Wang¹  Shipeng Chen²  Lin Hua²  Zheng Li²  Baoyu Xue²  Yimin Hou²  Yange Fan²  Li Feng³ 

[1] Guangdong-Hong Kong-Macao Joint Laboratory for Neutron Scattering Science and Technology, 1 Zhongziyuan Road, Dalang, Dongguan 523803, China;Henan Institute of Chemistry, Henan Academy of Sciences, No. 56 Hongzhuan Road, Zhengzhou 450003, China;Jiangsu Sunpower Co., Ltd., No 8 of Xingyuan Road, Huangqiao Industrical Park, Taixing 225400, China;

关键词: low-molecular-weight gel;    shear thinning;    supramolecular interactions;    self-assembly;    thixotropic mechanism;   

DOI  :  10.3390/gels8030193

来源: DOAJ

【 摘 要 】

Owing to the potential of sodium as an alternative to lithium as charge carrier, increasing attention has been focused on the development of high-performance electrolytes for Na batteries in recent years. In this regard, gel-type electrolytes, which combine the outstanding ionic conductivity of liquid electrolytes and the safety of solid electrolytes, demonstrate immense application prospects. However, most gel electrolytes not only need a number of specific techniques for molding, but also typically suffer from breakage, leading to a short service life and severe safety issues. In this study, a supramolecular thixotropic ionogel electrolyte is proposed to address these problems. This thixotropic electrolyte is formed by the supramolecular self-assembly of D-gluconic acetal-based gelator (B8) in an ionic liquid solution of a Na salt, which exhibits moldability, a high ionic conductivity, and a rapid self-healing property. The ionogel electrolyte is chemically stable to Na and exhibits a good Na⁺ transference number. In addition, the self-assembly mechanism of B8 and thixotropic mechanism of ionogel are investigated. The safe, low-cost and multifunctional ionogel electrolyte developed herein supports the development of future high-performance Na batteries.

【 授权许可】

Unknown