Carbon-coating strengthens the solid electrolyte interphase to inhibit Si pulverization

Wang, Xuyang1,2,3; Li, Yingzhi1,3; Wang, Xinyang1,3; Gan, Qingmeng1,3; Wang, Zhenyu1,3; Liao, Kemeng1,3; Wu, Sisi1,3; Guo, Hao1,3; Li, Jiangyu1,2; Huang, Boyuan1,2; Lu, Zhouguang1,3

2023-04-01

10.1039/d3ta00183k

JOURNAL OF MATERIALS CHEMISTRY A   影响因子和分区

2050-7488

2050-7496

The huge volume change during cycling causes severe electrode pulverization and rapid capacity fading of Si-based anodes. So far, various carbon-coating methods have been explored to enhance the cycling stability of Si anodes. However, the mechanism behind this strategy receives little attention. In this work, the stability of the solid electrolyte interphase (SEI) formed on carbon-coated Si and its role in the fracture inhibition are verified using X-ray photoelectron spectroscopy with Ar ion sputtering and the amplitude modulation-frequency modulation mode of scanning probe microscopy. A comparative experimental study and density functional theory calculations of the adsorption energy of electrolyte components confirm that fluoroethylene carbonate is more apt to be adsorbed on the surface of the carbon-coating layer to form a robust SEI than on that of Si. The LiF-rich SEI with higher Young's modulus can withstand the volume change upon lithiation/delithiation of Si, and keep itself intact. Therefore, the enhanced SEI can inhibit the cracking of Si and suppress continuous decomposition of electrolyte. This study provides critical insights into the function of the SEI from the perspective of carbon coating/electrolyte interphase protection, and also gives valuable suggestions to the design of electrodes with large volume change.

SCI ; EI

英语

第一 ; 通讯

National Natural Science Foundation of China["12192213","12102164"] ; Guangdong Provincial Key Laboratory Program from the Department of Science and Technology of Guangdong Province[2021B1212040001] ; Guangdong Provincial Department of Education Innovation Team Program[2021KCXTD012] ; Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies[EEST2021-1] ; Basic Research Project of the Science and Technology Innovation Commission of Shenzhen[JCYJ20220818100418040] ; Stable Support Plan Program of Shenzhen Natural Science Fund[20200925154236004] ; Shenzhen Key Laboratory[ZDSYS20200421111401738] ; Leading Talents of Guangdong Province Program[2019B121205001] ; Special Funds for the Cultivation of Guangdong College Students' Scientific and Technological Innovation ("Climbing Program" Special Funds)["pdjh2022c0010","S201914325023"]

Chemistry ; Energy & Fuels ; Materials Science

Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary

WOS:000975988200001

ROYAL SOC CHEMISTRY

20231814037278

Anodes ; Carbon ; Coatings ; Density functional theory ; Elastic moduli ; Lithium compounds ; Seebeck effect ; Silicon ; Solid electrolytes ; X ray photoelectron spectroscopy

Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Electricity: Basic Concepts and Phenomena:701.1 ; Electron Tubes:714.1 ; Chemistry:801 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Coating Materials:813.2 ; Probability Theory:922.1 ; Atomic and Molecular Physics:931.3 ; Quantum Theory; Quantum Mechanics:931.4 ; Materials Science:951

Web of Science

1.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China
2.Southern Univ Sci & Technol, Guangdong Prov Key Lab Funct Oxide Mat & Devices, Shenzhen 518055, Guangdong, Peoples R China
3.Southern Univ Sci & Technol, Shenzhen Key Lab Interfacial Sci & Engn Mat, Shenzhen 518055, Guangdong, Peoples R China

Wang, Xuyang,Li, Yingzhi,Wang, Xinyang,et al. Carbon-coating strengthens the solid electrolyte interphase to inhibit Si pulverization[J]. JOURNAL OF MATERIALS CHEMISTRY A,2023,11(18):9807-9815.

Wang, Xuyang.,Li, Yingzhi.,Wang, Xinyang.,Gan, Qingmeng.,Wang, Zhenyu.,...&Lu, Zhouguang.(2023).Carbon-coating strengthens the solid electrolyte interphase to inhibit Si pulverization.JOURNAL OF MATERIALS CHEMISTRY A,11(18),9807-9815.

Wang, Xuyang,et al."Carbon-coating strengthens the solid electrolyte interphase to inhibit Si pulverization".JOURNAL OF MATERIALS CHEMISTRY A 11.18(2023):9807-9815.