期刊
SMALL METHODS
卷 5, 期 7, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smtd.202100215
关键词
interlayers; Li-S batteries; morphologic effects; pulsed laser ablation; red phosphorus
资金
- Innovation and Technology Commission of Hong Kong, Research Institute for Smart Energy of the Hong Kong Polytechnic University [Q-CDA3]
- National Research Foundation of Korea (NRF) - Korea government (MSIT) [NRF-2020R1A2C2006720]
- Global Frontier Hybrid Interface Materials (GFHIM) of NRF - Ministry of Science and ICT [2013M3A6B1078882]
The use of a red phosphorus nanoparticle-coated carbon nanotube film as an interlayer in Li-S batteries shows promise in enhancing performance by trapping lithium polysulfides. The interlayer provides pathways for effective Li+ and electron transfer and exhibits strong chemical interactions with LiPSs, resulting in superior specific capacity and cycling performances. This work demonstrates the potential of using this interlayer for improved electrochemical performances in Li-S batteries and other flexible energy storage devices.
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.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据