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Elucidating the Polymeric Binder Distribution within Lithium‐Ion Battery Electrodes Using SAICAS
Author(s) -
Kim Kyuman,
Byun Seoungwoo,
Choi Jaecheol,
Hong Seungbum,
Ryou MyungHyun,
Lee Yong Min
Publication year - 2018
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201800072
Subject(s) - electrode , materials science , adhesion , electrochemistry , current collector , lithium (medication) , battery (electricity) , composite material , composite number , chemical engineering , lithium ion battery , nanotechnology , chemistry , electrolyte , medicine , physics , quantum mechanics , engineering , endocrinology , power (physics)
Polymeric binder distribution within electrodes is crucial to guarantee the electrochemical performance of lithium‐ion batteries (LIBs) for their long‐term use in applications such as electric vehicles and energy‐storage systems. However, due to limited analytical tools, such analyses have not been conducted so far. Herein, the adhesion properties of LIB electrodes at different depths are measured using a surface and interfacial cutting analysis system (SAICAS). Moreover, two LiCoO 2 electrodes, dried at 130 and 230 °C, are carefully prepared and used to obtain the adhesion properties at every 10 μm of depth as well as the interface between the electrode composite and the current collector. At high drying temperatures, more of the polymeric binder material and conductive agent appears adjacent to the electrode surface, resulting in different adhesion properties as a function of depth. When the electrochemical properties are evaluated at different temperatures, the LiCoO 2 electrode dried at 130 °C shows a much better high‐temperature cycling performance than does the electrode dried at 230 °C due to the uniform adhesion properties and the higher interfacial adhesion strength.