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Improvement of Lithium‐Ion Battery Performance by Two‐Layered Slot–Die Coating Operation
Author(s) -
Liu Darjen,
Chen LiChun,
Liu TaJo,
Chu WenBing,
Tiu Carlos
Publication year - 2017
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201600536
Subject(s) - cathode , materials science , anode , coating , electrode , layer (electronics) , slurry , composite material , battery (electricity) , lithium (medication) , particle (ecology) , substrate (aquarium) , lithium ion battery , electrical conductor , chemical engineering , electrical engineering , chemistry , medicine , power (physics) , physics , oceanography , quantum mechanics , endocrinology , geology , engineering
The cathode and anode electrodes in lithium‐ion batteries typically contain a significant proportion of particles and binders. During the electrode drying process, high temperature will lead to the binder migration phenomenon. Uneven particle/binder distribution can cause poor adhesion between coating and substrate, disruption of conductive paths, and decrease in electrode performance. In this study, a two‐layered cathode was designed by using separate compositions of slurry ingredients in each layer, as produced by means of a simultaneous multilayer coating method. The two‐layered cathode with the top layer containing less binder than the bottom layer yielded a better particle/binder distribution in the final structure under high‐temperature drying. A battery made with the two‐layered cathode appeared to give a better overall performance.
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