Journal article
Ti3C2Tx nanosheet wrapped core-shell MnO2 nanorods @ hollow porous carbon as a multifunctional polysulfide mediator for improved Li-S batteries
Nanoscale, v 12(47), pp 24196-24205
21 Dec 2020
PMID: 33289739
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Lithium-sulfur (Li-S) batteries are regarded as potential next-generation energy storage systems due to their high theoretical energy densities. However, the dissolution of lithium polysulfides (LiPSs) upon cycling can result in severe capacity degradation. Achieving high rate capabilities with good cycling stability remains a huge obstacle for the practical implementation of Li-S batteries. Here we developed a novel, multifunctional, hierarchical structure by self-assembling core-shell MnO2 nanorods @ hollow porous carbon with 2D Ti3C2Tx nanosheets, labelled as MCT, as an efficient polysulfide mediator for Li-S cathodes. The integration of the polar MnO2 core and hollow porous carbon shell captures LiPSs two ways: physical confinement and chemisorption. The conductive Ti3C2Tx nanosheets construct a continuous and conductive network, which not only promotes charge transfer and ion diffusion but also boosts LiPS adsorption and conversion. Based on these merits, the MCT/S cathode delivers good rate capability (688 mA h g(-1) at 2.0C) and outstanding long-term cyclability (0.044% capacity decay per cycle over 600 cycles at 2.0C).
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Details
- Title
- Ti3C2Tx nanosheet wrapped core-shell MnO2 nanorods @ hollow porous carbon as a multifunctional polysulfide mediator for improved Li-S batteries
- Creators
- Heng Zhang - Southeast UniversityPeigen Zhang - Southeast UniversityLong Pan - Southeast UniversityWei He - Southeast UniversityQi Qi - Southeast UniversityZhuoheng Bao - Southeast UniversityLi Yang - Southeast UniversityWei Zhang - Southeast UniversityMichel W. Barsoum - Drexel UniversityZhengMing Sun - Southeast University
- Publication Details
- Nanoscale, v 12(47), pp 24196-24205
- Publisher
- Royal Soc Chemistry
- Number of pages
- 10
- Grant note
- BK20200386 / Natural Science Foundation of Jiangsu Province Zhishan Youth Scholar Program of Southeast University 51731004; 51671054 / National Natural Science Foundation of China; National Natural Science Foundation of China (NSFC) 2242018K40109; 2242019R10006 / Fundamental Research Funds for the Central Universities KYCX19_0071 / Postgraduate Research & Practice Innovation Program of Jiangsu Province
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000600106100030
- Scopus ID
- 2-s2.0-85098165195
- Other Identifier
- 991019167952404721
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InCites Highlights
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Multidisciplinary
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology
- Physics, Applied