A novel lithium-impregnated hollow MOF-based electrolyte realizing an optimum balance between ionic conductivity and the transference number in solid-like batteries. Issue 26 (23rd June 2022)

• Record Type: Journal Article
• Authors: Tao, Fencheng; Tian, Li; Liu, Zixin; Cui, Ruixue; Liu, Meiying; Kang, Xiaomin; Liu, Zhiliang
• Is Part Of: Journal of materials chemistry. Volume 10:Issue 26(2022)
• Page Start: 14020
• Page End: 14027
• Publication Date: 2022-06-23
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d2ta01847k
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : A novel lithium-impregnated hollow MOFs as the electrolyte to assemble solid-state battery, presenting excellent ionic conductivity and high Li + transference number. Abstract : Low Li-ionic conductivity of solid electrolytes and an unstable interface contact severely hamper the practicability of lithium-ion solid-state batteries. It is always a great challenge to construct a well-behaved lithium electrolyte material with high electrochemical characteristics. Herein, a novel hollow structure HM-MIL with a large cavity has been prepared through selective surface corrosion of Cr, Al-bimetallic MIL-101, presenting an ionic conductivity of 6.53 × 10 −4 S cm −1 . Then, the electrochemical performance has been further optimized to obtain LiNO3 @HM-MIL electrolyte based on LiNO3 -filled HM-MIL. Encouragingly, LiNO3 @HM-MIL presents good electrode/electrolyte interfacial compatibility, low interfacial resistances, stable Li plating/stripping and suppressed lithium dendrite growth. Moreover, the ionic conductivity was upgraded to 1.24 × 10 −3 S cm −1 and the transference number was determined to be 0.86 for LiNO3 @HM-MIL, which makes an optimal balance between these two important parameters up to now. Importantly, LiNO3 @HM-MIL can be reused for 4000 h without obvious change in coulombic efficiency (100%), revealing good rate charge/discharge capability and long cycling durability. This study provides a new avenue for designing and fabricating high-performance lithium-ion batteries.