Open AccessVersatile Asymmetric Separator with Dendrite‐Free Alloy Anode Enables High‐Performance Li–S Batteries
Author(s) -
Yan Wenqi,
Yang JinLin,
Xiong Xiaosong,
Fu Lijun,
Chen Yuhui,
Wang Zhaogen,
Zhu Yusong,
Zhao JianWei,
Wang Tao,
Wu Yuping
Publication year - 2022
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.202202204
Subject(s) - anode , separator (oil production) , materials science , cathode , alloy , chemical engineering , energy storage , metallurgy , chemistry , electrode , power (physics) , physics , quantum mechanics , engineering , thermodynamics
Lithium–sulfur batteries (LSBs) with extremely‐high theoretical energy density (2600 Wh kg −1 ) are deemed to be the most likely energy storage system to be commercialized. However, the polysulfides shuttling and lithium (Li) metal anode failure in LSBs limit its further commercialization. Herein, a versatile asymmetric separator and a Li‐rich lithium–magnesium (Li–Mg) alloy anode are applied in LSBs. The asymmetric separator is consisted of lithiated‐sulfonated porous organic polymer (SPOP‐Li) and Li 6.75 La 3 Zr 1.75 Nb 0.25 O 12 (LLZNO) layers toward the cathode and anode, respectively. SPOP‐Li serves as a polysulfides barrier and Li‐ion conductor, while the LLZNO functions as an “ion redistributor”. Combining with a stable Li–Mg alloy anode, the symmetric cell achieves 5300 h of Li stripping/plating and the modified LSBs exhibit a long lifespan with an ultralow fading rate of 0.03% per cycle for over 1000 cycles at 5 C. Impressively, even under a high‐sulfur‐loading (6.1 mg cm −2 ), an area capacity of 4.34 mAh cm −2 after 100 cycles can still be maintained, demonstrating high potential for practical application.