Surface-Coating Strategies of Si-Negative Electrode Materials in Lithium-Ion Batteries

Silicon (Si) is recognized as a promising candidate for next-generation lithium-ion batteries (LIBs) owing to its high theoretical specific capacity (~4200 mAh g[sup.−1] ), low working potential (<0.4 V vs. Li/Li[sup.+] ), and abundant reserves. However, several challenges, such as severe volumet...

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Bibliographic Details
Published inBatteries (Basel) Vol. 10; no. 9; p. 327
Main Authors Song, Wonyoung, Chae, Oh B
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.09.2024
Subjects
Analysis
Coating
coating materials
coating methods
Coating processes
Composition
Decomposition
Design and construction
Electric contacts
Electrical conductivity
Electrical resistivity
Electrochemical analysis
Electrode materials
Electrodes
Electrolytes
Electrons
Energy
Equilibrium
Graphite
Intermetallic compounds
Ion currents
Lithium
Lithium cells
Lithium-ion batteries
Materials
Methods
Protective coatings
Silicon
surface coating
Temperature
South Korea
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Summary:Silicon (Si) is recognized as a promising candidate for next-generation lithium-ion batteries (LIBs) owing to its high theoretical specific capacity (~4200 mAh g[sup.−1] ), low working potential (<0.4 V vs. Li/Li[sup.+] ), and abundant reserves. However, several challenges, such as severe volumetric changes (>300%) during lithiation/delithiation, unstable solid–electrolyte interphase (SEI) formation, and inherently low electrical and ionic conductivity, impede its practical application. To mitigate these challenges, direct contact between the surface of the Si particle and the electrolyte must be prevented. In this review, we elucidated the surface coating strategies to enhance the electro–chemical performance of Si-based materials. We identified the impact of various coating methods and materials on the performance of Si electrodes. Furthermore, the integration of coating strategies with nanostructure design can effectively buffer Si electrode volume expansion and prevent direct contact with the electrolyte, thereby synergistically enhancing electrochemical performance. We highlight opportunities and perspectives for future research on Si-negative electrodes in LIBs, drawing on insights from previous studies.
ISSN:2313-0105
2313-0105
DOI:10.3390/batteries10090327