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Mussel‐Inspired Polydopamine‐Functionalized Super‐P as a Conductive Additive for High‐Performance Silicon Anodes
Author(s) -
Song Danoh,
Jung Daesoo,
Cho Inseong,
Ryou MyungHyun,
Lee Yong Min
Publication year - 2016
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.201600270
Subject(s) - materials science , coating , anode , scanning electron microscope , silicon , fabrication , slurry , electrical conductor , adhesion , chemical engineering , electrode , composite material , nanotechnology , metallurgy , medicine , chemistry , alternative medicine , pathology , engineering
The study has developed a facile polydopamine (PD) surface coating method for a typical conductive additive, Super‐P. This method is efficient, economical, and environmentally friendly, and it can be used for the mass production of Super‐P. PD treatment converts the hydrophobic surfaces of Super‐P into hydrophilic surfaces, facilitating slurry preparation, and slurry coating for the fabrication of Si‐based electrodes. Furthermore, the unique adhesion properties of PD and its ability to form a cross‐linking network with polymeric binders such as poly(acrylic acid) improve the cycle performance of Si anodes containing PD‐treated Super‐P (1395.1 mAh g –1 after 1000 cycles, and 1200 mA g –1 for charging and discharging processes). A postmortem scanning electron microscopy study reveals that PD‐treated Super‐P efficiently reduces the mechanical stress of Si anodes caused by large volumetric changes that occur during lithiation and delithiation.