Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6602078 | Electrochimica Acta | 2018 | 7 Pages |
Abstract
Power capability of solid state lithium sulfur (Li-S) batteries is severely weakened due to high impedance between electrodes and solid electrolyte. To solve this issue, herein we come up with a room temperature operating (20â¯Â°C) solid Li-S battery technology enabled by ionic liquid (IL) as interfacial modification. With IL, a significant decrease of interfacial resistance is observed from 3540 to 39â¯Î©â¯cm2 in symmetric cell, which can cycle well at a high current density of 0.5â¯mAâ¯cmâ2 with a small over potential of 300â¯mV (20â¯Â°C). On this basis, solid state Li-S batteries are fabricated with IL modification, and performed an excellent electrochemical behavior at 0.2â¯mAâ¯cmâ2 with the specific capacity of 340â¯mAh gâ1. Distinctly, the thin IL layer presents electrochemical and physical stability during the cycling and plays a flowable and seamless interfacial layer in solid state Li-S batteries.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Bin Sun, Kai Liu, Jialiang Lang, Minghao Fang, Yang Jin, Hui Wu,