中文版 | English
Title

A Design Strategy of Carbon Coatings on Silicon Nanoparticles as Anodes of High-Performance Lithium-Ion Batteries

Author
Corresponding AuthorXu, Zhenghe
Publication Years
2022-10-01
DOI
Source Title
ISSN
2574-0962
Abstract
Carbon coatings are commonly used to improve the performance of silicon anodes by providing a conductive shell that discourages the formation of excess solid/electrolyte interphase (SEI). Lack of understanding on the links between the properties of carbon components, such as mechanical properties and conductivity, and the electrochemical properties limits the advances in development of high-performance silicon-carbon nanocomposites. Herein, uniform carbon coatings with different degrees of graphitization were formed on the surface of silicon nanoparticles using bitumen as a carbon precursor. Analysis of electrochemical impedance spectroscopy (EIS) and distribution of relaxation time (DRT) shows that the carbon coating of higher elasticity and high Li+ diffusion coefficient through the control of carbonizing bitumen coatings on silicon nanoparticles greatly enhanced the electrochemical performance of carbon-coated silicon anodes. The high elasticity provides stable contacts between silicon and carbon coatings and maintains a stable electrode/electrolyte interface (without excessive SEI growth) during long-term cycling. Compared with electronic conductivity, the efficiency of ion diffusion in the carbon coating is found to play an important role in the rate capability of the electrode. This work provides a design strategy to further optimize the performance of the silicon-based anodes.
Keywords
URL[Source Record]
Indexed By
Language
English
SUSTech Authorship
First ; Corresponding
Funding Project
[2016LJ06C536] ; [ZDSYS20200421111401738] ; [21938003] ; [20200207]
WOS Research Area
Chemistry ; Energy & Fuels ; Materials Science
WOS Subject
Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
WOS Accession No
WOS:000868421500001
Publisher
Data Source
Web of Science
Citation statistics
Cited Times [WOS]:1
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/406515
DepartmentDepartment of Materials Science and Engineering
Affiliation
1.Southern Univ Sci & Technol, Key Univ Lab Highly Efficient Utilizat Solar Energ, Dept Mat Sci & Engn, Shenzhen Key Lab Interfacial Sci & Engn Mat, Shenzhen 518055, Peoples R China
2.Shenzhen Technol Univ, Coll New Mat & New Energies, Shenzhen 518055, Peoples R China
First Author AffilicationDepartment of Materials Science and Engineering
Corresponding Author AffilicationDepartment of Materials Science and Engineering
First Author's First AffilicationDepartment of Materials Science and Engineering
Recommended Citation
GB/T 7714
Tan, Wen,Yang, Fan,Lu, Zhouguang,et al. A Design Strategy of Carbon Coatings on Silicon Nanoparticles as Anodes of High-Performance Lithium-Ion Batteries[J]. ACS Applied Energy Materials,2022.
APA
Tan, Wen,Yang, Fan,Lu, Zhouguang,&Xu, Zhenghe.(2022).A Design Strategy of Carbon Coatings on Silicon Nanoparticles as Anodes of High-Performance Lithium-Ion Batteries.ACS Applied Energy Materials.
MLA
Tan, Wen,et al."A Design Strategy of Carbon Coatings on Silicon Nanoparticles as Anodes of High-Performance Lithium-Ion Batteries".ACS Applied Energy Materials (2022).
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