Promoting Granular Lithium Sulfide Growth by Soft Acidic-Hard Basic Ionomer Binder for Lithium-Sulfur Batteries
- Authors
- Moon, Hyunseok; Ryou, Myeong-Hwa; Park, Anseong; Li, Bo-Quan; Kim, Ha Neul; Park, Namjun; Lee, Eunbyoul; Chung, Kyung Yoon; Huang, Jia-Qi; Yim, Taeeun; Lee, Won Bo; Lee, 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
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