Promoting Granular Lithium Sulfide Growth by Soft Acidic-Hard Basic Ionomer Binder for Lithium-Sulfur Batteries

Authors
Moon, HyunseokRyou, Myeong-HwaPark, AnseongLi, Bo-QuanKim, Ha NeulPark, NamjunLee, EunbyoulChung, Kyung YoonHuang, Jia-QiYim, TaeeunLee, Won BoLee, Sang-Young
Issue Date
2025-04
Publisher
American Chemical Society
Citation
ACS Energy Letters, v.10, no.4, pp.1654 - 1663
Abstract
Electrode passivation limits the reversibility of lithium-sulfur (Li-S) batteries. Pivoting from the prevailing approaches that focus on electrode active materials and electrolytes, herein, we introduce a class of S electrode binders based on soft acidic-hard basic (SAHB) ionomers. The SAHB binder contains a soft cation (tetraallyl ammonium ion, TA+) paired with a hard counteranion (nitrate, NO3 -), allowing matched interactions with Li polysulfides (LiPS) via soft acid-soft base (TA+-S x 2-) and hard base-hard acid (NO3 --Li+) pairings. This intermolecular coupling retards LiPS diffusion, promoting three-dimensional granular Li sulfide (Li2S) growth, guided by a high Damkohler number (Da). Consequently, the SAHB binder enables a Li-S cell to achieve a high specific capacity of 1545 mAh gsulfur -1 (corresponding to 92.3% S utilization) and stable capacity retention (71.5% after 300 cycles at a current density of 1 C), outperforming previously reported S electrode binders.
Keywords
ELECTROLYTES; BEHAVIOR
URI
https://pubs.kist.re.kr/handle/201004/152236
DOI
10.1021/acsenergylett.4c03522
Appears in Collections:
KIST Article > Others
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML

qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE