High-performance electrospun membrane for lithium-ion batteries

A metal–organic framework-modified separator enables long cycling lithium-ion capacitors with asymmetric electrolyte design

“…Typically, the separator in electrochemical energy storage devices is to prohibit the direct contact of the two electrodes and secure the ion transfer. 32,33 As for the system with soluble redox mediators, the separator should further selectively prohibit the transfer of the soluble mediators since their transfer could result in serious self-discharge. 34,35 Recently, soluble redox mediators have been introduced into the LICs for capacity balancing.…”

A Light-Thin Chitosan Nanofiber Separator for High-Performance Lithium-Ion Batteries

“…According to the test results of the n-butyl alcohol porosimetry, the porosity of the CME15 and CME25 separators was 69% and 54%, respectively, which is much higher than that of the commercial Celgard separator (39%). Undoubtedly, a higher porosity is beneficial to further increase the electrolyte storage capacity of the separator [50]. To further evaluate the electrolyte wettability, contact angle measurements and analysis of liquid electrolyte wetting behavior were carried out (Figure 5).…”

Effective Strategy to Improve Safety of Lithium-Ion Batteries by Constructing Ion Transport Modes and Employing a Cross-Linking Structure in the Separator

“…Zou et al enhanced the mechanical properties of a separator by surface modification of an electrospinning lithium-ionized poly(ethylene-co-vinyl alcohol) (EVO-Li) separator, using polydopamine with a benzene structure and excellent adhesion ability. 42 Yu et al prepared flexible heat-resistant porous separators with high elasticity and excellent mechanical properties by adding alkane coupling agents (γ-3-glycidoxypropyltrimethoxysilane, γ-GPS) for composite separators. 43 In recent years, the physical or chemical cross-linking of polymers has emerged as an effective strategy for improving the mechanical strength of separators.…”

“…Separators with weak mechanical strength are most likely to be punctured by randomly growing lithium dendrites, which affect the operation of the cell. Zou et al enhanced the mechanical properties of a separator by surface modification of an electrospinning lithium-ionized poly­(ethylene- co -vinyl alcohol) (EVO-Li) separator, using polydopamine with a benzene structure and excellent adhesion ability . Yu et al prepared flexible heat-resistant porous separators with high elasticity and excellent mechanical properties by adding alkane coupling agents (γ-3-glycidoxypropyltrimethoxysilane, γ-GPS) for composite separators .…”