AUTHOR=Li Yingying , Li Xifei , Hao Youchen , Kakimov Alibek , Li Dejun , Sun Qian , Kou Liang , Tian Zhanyuan , Shao Le , Zhang Cheng , Zhang Jiujun , Sun Xueliang 

TITLE=β-FeOOH Interlayer With Abundant Oxygen Vacancy Toward Boosting Catalytic Effect for Lithium Sulfur Batteries

JOURNAL=Frontiers in Chemistry

VOLUME=8

YEAR=2020

URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2020.00309

DOI=10.3389/fchem.2020.00309

ISSN=2296-2646

ABSTRACT=<p>Due to the shuttle effect and low conductivity of sulfur (S), it has been challenging to realize the application of lithium-sulfur (Li-S) batteries with high performance and long cyclability. In this study, a high catalytic active CNTs@FeOOH composite is introduced as a functional interlayer for Li-S batteries. Interestingly, the existence of oxygen vacancy in FeOOH functions electrocatalyst and promotes the catalytic conversion of intercepted lithium polysulfides (LiPS). As a result, the optimized CNTs@FeOOH interlayer contributed to a high reversible capacity of 556 mAh g<sup>−1</sup> at 3,200 mA g<sup>−1</sup> over 350 cycles. This study demonstrates that enhanced catalytic effect can accelerate conversion efficiency of polysulfides, which is beneficial of boosting high performance Li-S batteries.</p>