Premium
Simultaneously Inhibiting Lithium Dendrites Growth and Polysulfides Shuttle by a Flexible MOF‐Based Membrane in Li–S Batteries
Author(s) -
He Yibo,
Chang Zhi,
Wu Shichao,
Qiao Yu,
Bai Songyan,
Jiang Kezhu,
He Ping,
Zhou Haoshen
Publication year - 2018
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201802130
Subject(s) - materials science , polysulfide , membrane , energy storage , chemical engineering , lithium (medication) , nanoparticle , nanotechnology , cathode , flexibility (engineering) , electrode , electrolyte , chemistry , medicine , biochemistry , physics , statistics , mathematics , quantum mechanics , engineering , endocrinology , power (physics)
Lithium–sulfur (Li–S) batteries are considered a promising candidate for next‐generation energy storage devices due to their ultrahigh theoretical energy density (≈2600 Wh kg −1 ). However, the uncontrolled growth of Li dendrites and the adverse effect of polysulfide shuttling seriously hinder their practical applications. Herein, a metal organic framework based membrane (MOF@PVDF‐HFP) with good flexibility is designed and fabricated by a facial vacuum filtration strategy. The highly uniform pore sizes of MOF particles facilitate homogenous Li‐ion fluxes, fundamentally inhibiting the growth of Li dendrites and resulting in stable Li plating/striping even at a quite high current density (10 mA cm −2 ). In addition, owing to the narrow pore size window of MOF nanoparticles, the MOF@PVDF‐HFP membrane serves as an effective barrier for suppressing the polysulfide shuttle, realizing an ultralong cycle life Li–S coin cell with an ultralow capacity fading upon 2000 cycles (0.015% per cycle). Moreover, high specific capacity (1269 mA h g −1 ) and excellent capacity retention (936 mA h g −1 after 200 cycles) of a flexible Li–S pouch cell with a high sulfur loading (5.8 mg cm −2 ) demonstrate the potential of MOF@PVDF‐HFP membranes for the development of practical energy storage devices.