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High-Performance Sodium-Ion Batteries Based on Nitrogen-Doped Mesoporous Carbon Spheres with Ultrathin Nanosheets
Zhong X.1,2; Li Y.1; Zhang L.1; Tang J.1; Li X.1; Liu C.1; Shao M.2; Lu Z.1; Pan H.2,3; Xu B.1
2019-01-23
Source PublicationACS Applied Materials and Interfaces
ISSN19448252 19448244
Volume11Issue:3Pages:2970-2977
Abstract

Hard carbon exhibits high theoretical capacity for sodium-ion batteries. However, its practical application suffers from low electric conductivity, poor electrochemical stability, and sluggish kinetics. To tackle these challenges, novel nitrogen-doped carbon spheres with mesopores, ultrathin nanostructure, and optimal graphitization are prepared by a three-step procedure. We find that the as-prepared sample (NMCSs-800) with an optimal structure and nitrogen content delivers a high reversible sodium storage capacity of 334.7 mA h/g at 50 mA/g and an ultrahigh rate performance of 93.9 mA h/g at 5 A/g, which is better than most state-of-the-art carbon materials. The improved energy storage capacity is attributed to its unique architecture and optimal nitrogen doping, which provide abundant active sites, defects, and voids. Moreover, kinetic analysis and in situ Raman spectroscopy results reveal adsorption and adsorption-intercalation mechanisms for Na storage in hard carbon at the slope region above 0.3 V and the other slope region of 0.3-0.02 V, respectively. We believe that our findings provide a novel tactic to design elaborate nanomaterials for the high-performance sodium-ion battery.

KeywordCarbon Sphere Hard Carbon Nanosheets Nitrogen-doping Sodium-ion Battery
DOI10.1021/acsami.8b17473
URLView the original
Indexed BySCI
Language英语
WOS Research AreaScience & Technology - Other Topics ; Materials Science
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS IDWOS:000457067300048
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Document TypeJournal article
CollectionInstitute of Applied Physics and Materials Engineering
Affiliation1.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China
2.Univ Macau, Fac Sci & Technol, Inst Appl Phys & Mat Engn, Joint Key Lab,Minist Educ, Macau 999078, Peoples R China
3.Univ Macau, Fac Sci & Technol, Dept Chem & Phys, Macau 999078, Peoples R China
First Author AffilicationUniversity of Macau
Recommended Citation
GB/T 7714
Zhong X.,Li Y.,Zhang L.,et al. High-Performance Sodium-Ion Batteries Based on Nitrogen-Doped Mesoporous Carbon Spheres with Ultrathin Nanosheets[J]. ACS Applied Materials and Interfaces,2019,11(3):2970-2977.
APA Zhong X..,Li Y..,Zhang L..,Tang J..,Li X..,...&Xu B..(2019).High-Performance Sodium-Ion Batteries Based on Nitrogen-Doped Mesoporous Carbon Spheres with Ultrathin Nanosheets.ACS Applied Materials and Interfaces,11(3),2970-2977.
MLA Zhong X.,et al."High-Performance Sodium-Ion Batteries Based on Nitrogen-Doped Mesoporous Carbon Spheres with Ultrathin Nanosheets".ACS Applied Materials and Interfaces 11.3(2019):2970-2977.
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