@article{Peng2023, 
author = {Yan-Qi Peng and Meng Zhao and Zi-Xian Chen and Qian Cheng and Yiran Liu and Xi-Yao Li and Yun-Wei Song and Bo-Quan Li and Jia-Qi Huang},
title = {Boosting sulfur redox kinetics by a pentacenetetrone redox mediator for high-energy-density lithium-sulfur batteries},
year = {2023},
journal = {Nano Research},
volume = {16},
number = {6},
pages = {8253-8259},
keywords = {lithium-sulfur batteries, lithium polysulfides, redox mediation, sulfur redox kinetics, pouch cells},
url = {https://www.sciopen.com/article/10.1007/s12274-022-4584-z},
doi = {10.1007/s12274-022-4584-z},
abstract = {Lithium-sulfur (Li-S) battery is considered as a promising energy storage system due to its ultrahigh theoretical energy density of 2,600 Wh·kg−1. Redox mediation strategies have been proposed to promote the sluggish sulfur redox kinetics. Nevertheless, the applicability of redox mediators in practical high-energy-density Li-S batteries has seldomly been manifested. In this work, 5,7,12,14-pentacenetetrone (PT) is proposed as an effective redox mediator to promote the sulfur redox kinetics under practical working conditions. A high initial specific discharge capacity of 993 mAh·g−1 is achieved at 0.1 C with high-sulfur-loading cathodes of 4.0 mgS·cm−2 and low electrolyte/sulfur (E/S) ratio of 5 μL·mgS−1. More importantly, practical Li-S pouch cells with the PT mediator realize an actual initial energy density of 344 Wh·kg−1 and cycle stably for 20 cycles wih a high capacity retention of 88%. This work proposes an effective redox mediator and further verifies the redox mediation strategy for practical high-energy-density Li-S batteries.}
}