Laser-Ablated Red Phosphorus on Carbon Nanotube Film for Accelerating Polysulfide Conversion toward High-Performance and Flexible Lithium-Sulfur Batteries
- Authors
- Lee, Jeongyeon; Song, Hyeonjun; Min, Kyung-Ah; Guo, Qianyi; Kim, Daekyu; Zheng, Zijian; Han, Byungchan; Jung, Youngjin; Lee, Lawrence Yoon Suk
- Issue Date
- Jul-2021
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- interlayers; Li-S batteries; morphologic effects; pulsed laser ablation; red phosphorus
- Citation
- SMALL METHODS, v.5, no.7
- Journal Title
- SMALL METHODS
- Volume
- 5
- Number
- 7
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/42331
- DOI
- 10.1002/smtd.202100215
- ISSN
- 2366-9608
- Abstract
- The use of a conducting interlayer between separator and cathode is one of the most promising methods to trap lithium polysulfides (LiPSs) for enhancing the performance of lithium-sulfur (Li-S) batteries. Red phosphorus nanoparticles (RPEN)-coated carbon nanotube (CNT) film (RPEN@CF) is reported herein as a novel interlayer for Li-S batteries, which shows strong chemisorption of LiPSs, good flexibility, and excellent electric conductivity. A pulsed laser ablation method is engaged for the ultrafast production of RPEN of uniform morphology, which are deposited on the CNT film by a direct spinning method. The RPEN@CF interlayer provides pathways for effective Li+ and electron transfer and strong chemical interaction with LiPSs. The S/RPEN@CF electrode shows a superior specific capacity of 782.3 mAh g(-1) (3 C-rate) and good cycling performances (769.5 mAh g(-1) after 500 cycles at 1 C-rate). Density functional theory calculations reveal that the morphology and dispersibility of RPEN are crucial in enhancing Li+ and electron transfer kinetics and effective trap of LiPSs. This work demonstrates the possibility of using the RPEN@CF interlayer for the enhanced electrochemical performances of Li-S batteries and other flexible energy storage devices.
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