Nitrogen-Doped Graphene Uniformly Loaded with Large Interlayer Spacing MoS2 Nanoflowers for Enhanced Lithium–Sulfur Battery Performance

Autor: Zhen Wu, Wenfeng He, Renjie Xie, Xuan Xiong, Zihan Wang, Lei Zhou, Fen Qiao, Junfeng Wang, Yan Zhou, Xinlei Wang, Jiajia Yuan, Tian Tang, Chenyao Hu, Wei Tong, Lubin Ni, Xin Wang, Yongsheng Fu
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Molecules, Vol 29, Iss 20, p 4968 (2024)
Druh dokumentu: article
ISSN: 29204968
1420-3049
DOI: 10.3390/molecules29204968
Popis: Lithium–sulfur (Li-S) batteries offer a high theoretical energy density but suffer from poor cycling stability and polysulfide shuttling, which limits their practical application. To address these challenges, we developed a PANI-modified MoS2-NG composite, where MoS2 nanoflowers were uniformly grown on graphene oxide (GO) through PANI modification, resulting in an increased interlayer spacing of MoS2. This expanded spacing exposed more active sites, enhancing polysulfide adsorption and catalytic conversion. The composite was used to prepare MoS2-NG/PP separators for Li-S batteries, which achieved a high specific capacity of 714 mAh g−1 at a 3 C rate and maintained a low capacity decay rate of 0.085% per cycle after 500 cycles at 0.5 C. The larger MoS2 interlayer spacing was key to improving redox reaction kinetics and suppressing the shuttle effect, making the MoS2-NG composite a promising material for enhancing the performance and stability of Li-S batteries.
Databáze: Directory of Open Access Journals
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