Extending the Life of Lithium‐Based Rechargeable Batteries by Reaction of Lithium Dendrites with a Novel Silica Nanoparticle Sandwiched Separator

Abstract

A reaction-protective separator that slows the growth of lithium dendrites penetrating into the separator is produced by sandwiching silica nanoparticles between two polymer separators. The reaction between lithium dendrites and silica nanoparticles consumes the dendrites and can extend the life of the battery by approximately five times.

Flexible, Flame‐Resistant, and Dendrite‐Impermeable Gel‐Polymer Electrolyte for Li–O2/Air Batteries Workable Under Hurdle Conditions

“…All of these crosslinked structures (as demonstrated Figure and Figures S15 and Figure S16, Supporting Information) lead to superior room temperature ionic conductivity with high‐temperature‐tolerant capability. More importantly, the SiO 2 nanoparticles in FST‐GPE will react with fresh Li dendrites through a solid‐state conversion reaction, which can efficiently etch away dangerous Li dendrites, thereby extending the life of Li‐metal based battery. Besides, the crosslinked SiO 2 nanoparticles in FST‐GPE can provide a mechanical barrier to protect against dendritic Li penetration as well as water or flame attacks, thus improving the cycling stabilities, especially working in hurdle conditions.…”

Two‐Dimensional Material‐Functionalized Separators for High‐Energy‐Density Metal–Sulfur and Metal‐Based Batteries

“…New functional separators also play crucial roles in harnessing ultrahigh‐capacity MAs and sulfur cathodes. Uncontrollable metal dendrite growth can be regulated by designing functional separators to homogenize the distribution of ionic flux, to strengthen the mechanical properties, and to enhance the interaction between the separators and the metal anodes (Scheme ) . The well‐known “shuttle effect” of polysulfide (PS) species from sulfur cathodes can also be suppressed by introducing functional materials on the separator …”

“…Uncontrollable metal dendrite growth can be regulated by designing functional separators to homogenize the distribution of ionic flux, [6] to strengthen the mechanical properties, [7] and to enhance the interaction between the separators and the metal anodes( Scheme 1). [8] The well-known "shuttle effect" of polysulfide( PS) speciesf rom sulfur cathodesc an also be suppressedb yi ntroducing functional materials on the separator. [4a] For the design of functional separators, two-dimensional (2 D) materials, such as graphene and derivatives, MXenes (metalc arbides/carbonitrides), 2D metal oxides/sulfides,2Dn itrides/phosphides, and black phosphorus, offer the unique advantage of forming homogenous and intimate coverage along with facile processability in comparison with the open-struc-Functional separators have attracted much attention owing to their effectiveness in supporting the stable and safe operation of future ultrahigh-capacity electrodes, especially sulfur cathodes and metal anodesi nr echargeable batteries.…”

Synergistically Suppressing Lithium Dendrite Growth by Coating Poly‐l‐Lactic Acid on Sustainable Gel Polymer Electrolyte

“…Thus, the rechargeable Li metal anode is very suitable for promising next‐generation energy storage systems such as Li–air (oxygen) and Li–sulfur batteries . With conventional transient metal oxide cathodes, rechargeable Li metal batteries (LMBs) are provided with a much higher specific capacity than their counterpart LIBs . However, the Li metal anode has undergone many challenges since its inception in the 1970s because Li dendrite formed during the Li metal deposition and dissolution can result in an internal short circuit and safety issues.…”