Selection of Binder and Solvent for Solution-Processed All-Solid-State Battery

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All-solid-state batteries (ASSBs) are gaining prominence for their ability to overcome the intrinsic drawbacks of conventional liquid-based counterparts, such as electrolyte leakage, flammability, and limited voltage window. Nevertheless, ASSBs have so far been mainly investigated using lab-scale dry mixing processes and therefore suffer from limitation of scalability and agglomeration of active particles in the composite electrodes. Here, we report a systematic investigation on ASSBs fabricated by a solution-based casting process. By screening a wide range of binders and solvents, acrylonitrile butadiene rubber and para-xylene were a suitable binder and solvent, respectively, compatible with sulfide glass-ceramic solid electrolyte. This binder-solvent combination facilitates homogeneous dispersion of the solid electrolyte in the slurry and electrolyte layer, offering high adhesion between electrode materials and comparable lithium ionic conductivity to that of the dry mixing-based counterpart. When solution-based casting processes were adopted for both electrolyte and composite cathode (containing LiNi0.8Co0.1Mn0.1O2) layers, the solution-processed cell exhibits decent performance in rate capability and cyclability due to higher homogeneity of the electrode components, originating from the appropriate combination of solvent and binder. (C) 2017 The Electrochemical Society. All rights reserved.
Publisher
ELECTROCHEMICAL SOC INC
Issue Date
2017
Language
English
Article Type
Article
Keywords

LITHIUM-ION BATTERIES; HIGH POLAR POLYACRYLONITRILE; GLASS-CERAMIC ELECTROLYTES; SUPERIONIC CONDUCTOR; LI; PERFORMANCE; LI2S-P2S5; SYSTEM; SAFETY; OXIDES

Citation

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, v.164, no.9, pp.A2075 - A2081

ISSN
0013-4651
DOI
10.1149/2.1341709jes
URI
http://hdl.handle.net/10203/226936
Appears in Collection
EEW-Journal Papers(저널논문)
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