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Ending the Chase for a Perfect Binder: Role of Surface Chemistry Variation and its Influence on Silicon Anodes
Author(s) -
Hays Kevin A.,
Armstrong Beth,
Veith Gabriel M.
Publication year - 2020
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.202001066
Subject(s) - silicon , electrochemistry , anode , slurry , materials science , electrode , chemical vapor deposition , deposition (geology) , chemical engineering , ion , nanotechnology , chemistry , optoelectronics , composite material , organic chemistry , paleontology , sediment , engineering , biology
In this work we examine the influence of the type of silicon source material (two milled and two plasma enhanced chemical vapor deposition) on the electrochemical performance of silicon‐based anodes for Li‐ion batteries. The four representative Si sources were previously identified in literature but have never been compared side by side, which is critical to understanding the wide variation in performance reported for silicon‐based electrodes. These particles display unique surface features associated with surface oxides and residual precursor species (Si−N, Si−C, Si−H) which impact processability by changing interactions within the electrode slurry and the resulting electrochemical performance. These properties should be taken into consideration when utilizing “off‐the‐shelf” Si powders for investigations and would be good variables to explore to understand why certain chemistries display suitable performance, while others “don't work.”