Simultaneously Inhibiting Lithium Dendrites Growth and Polysulfides Shuttle by a Flexible MOF‐Based Membrane in Li–S Batteries
By Yibo He, Z. Chang, Shichao Wu, Y. Qiao, Songyan Bai, K. Jiang, P. He, Haoshen Zhou. Advanced Energy Materials, 2018
249 citations recorded by the source corpus.
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.
Subfields: Automotive Engineering, Electrical and Electronic Engineering
View Paper: https://www.semanticscholar.org/paper/9f839295f156304f59e83dcb6b0ec35642891f58
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In Electrical and Electronic Engineering
Citations in the corpus
- Mechanistic understanding of the role separators playing in advanced lithium‐sulfur batteries (2020, methodology): “With these two methods, several types of separators have been developed for lithium dendrite suppression in lithium-sulfur batteries.(70,82,143,171-182) Both good mechanical strength and small pore sizes are considered to be beneficial for suppressing lithium dendrites penetration.”