An ultrathin and highly efficient interlayer for lithium–sulfur batteries with high sulfur loading and lean electrolyte

Abstract

Lithium-sulfur (Li-S) batteries are considered to have great potential due to their high theoretical specific energy and natural abundance of sulfur. However, the practical specific energy and cycle life of...

Boron‐Based High‐Performance Lithium Batteries: Recent Progress, Challenges, and Perspectives

“…Therefore, the LSB containing VN/PVDF-PMMA/h-BN separator has high specific capacity, excellent rate performance, and long cycle life. Fan et al [200] coated an ultrathin high-efficient BN nanosheet/single-wall carbon nanotube interlayer (UHEI) on the conventional PP separator to prepare a novel modified separator (UHEI@PP), which can inhibit the diffusion of PS, promote redox reaction, and facilitate the passage of Li. Compared with the pristine PP separator, the UHEI@PP separator can significantly improve the electrochemical performance of LSBs.…”

“…d) Schematic diagram of cycling performance of Li-sulfur pouch cell with UHEI@PP and PP separator. Reproduced with permission [200]. Copyright 2022, Royal Society of Chemistry.…”

Solutions to the Challenges of Lithium–Sulfur Batteries by Carbon Nanotubes

“…[ 163b ] Notably, optimizing the cathode host with CNTs is the most popular strategy, [ 164 ] while interlayer/functional separator engineering has been adopted to achieve high areal capacity at lean electrolyte conditions as well. [ 140,163d,165 ] Though there is a gap between the goals proposed in the Battery500 Consortium and the current technologies, the integration of CNTs with LSBs has indeed exhibited the potential to commercialize devices with high energy density and stable cycling performance.…”

“…The numbers next to the symbols are the operating cycles when the measurement is taken for each data point. [ 161–164,164b,c,165a,166 ]…”

A multifunctional separator modified using Y2O3/Co3O4 heterostructures boosting polysulfide catalytic conversion for advanced Li–S batteries

“…were used as the original functional materials due to their adsorption properties and conductivity. [12][13][14][15] However, carbon materials are not effective for polysuldes on account of their weak adsorption effect. Therefore, polar materials such as polymers, 16,17 metallic nanoparticles, [18][19][20] metal oxides, metal hydroxides, 21 metal suldes, 22 metal nitrides, 23 metal phosphates, [24][25][26] metal organic frameworks (MOFs) 27,28 and covalent organic frameworks (COFs) 29 with strong chemisorption for LiPSs have been proposed in recent years.…”