Premium
SiO 2 blending polyetherimide separator modified with acetylene black/polyvinylpyrrolidone coating layer to enhance performance for lithium‐sulfur batteries
Author(s) -
Liu Jiuqing,
Liu Meng,
Wang Cheng,
Li Qihou,
Li Jie,
Chen Ya,
Hong Zikun,
Song Feifei,
Bai Lishun,
Zeng Fanli
Publication year - 2021
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.6902
Subject(s) - polysulfide , polyetherimide , separator (oil production) , materials science , chemical engineering , coating , dissolution , polyethylenimine , acetylene , electrode , composite material , chemistry , electrolyte , organic chemistry , polymer , physics , engineering , thermodynamics , transfection , biochemistry , gene
Summary The dissolution and diffusion of intermediate product polysulfide in lithium‐sulfur battery (Li‐S) between electrodes pose great challenge for the further application of Li‐S batteries. Herein, we first prepared nano SiO 2 blending polyetherimide (PEI) separator modified with acetylene black/polyvinylpyrrolidone (PVP) coating layer. Joint effect of acetylene black and PVP on polysulfide contribute to outstanding cycle performance. The Li‐S cell with CP55 separator presents superior cycle performance (650 mAh g −1 ) than the Li‐S cells with the Celgard 2320 and PEI‐4 separator after 200 cycles. In addition, the SiO 2 blending PEI separator modified with acetylene black/PVP coating layer for Li‐S cells shows higher ionic conductivity (2.02 mS cm −1 ), excellent compatibility with lithium and better thermal stability. This work presents a convenient and economical strategy to alleviate polysulfide dissolution and the CP55 separator is a promising candidate for the further application of Li‐S batteries.