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Performance Enhancement of Silicon Alloy-Based Anodes Using Thermally Treated Poly(amide imide) as a Polymer Binder for High Performance Lithium-Ion Batteries

Title
Performance Enhancement of Silicon Alloy-Based Anodes Using Thermally Treated Poly(amide imide) as a Polymer Binder for High Performance Lithium-Ion Batteries
Author
김동원
Keywords
NEGATIVE ELECTRODES; NANOSTRUCTURED SILICON; POLYAMIDE-IMIDE; CYCLE LIFE; POLYIMIDE; CHALLENGES; MECHANISM; ADHESIVE
Issue Date
2016-04
Publisher
AMER CHEMICAL SOC
Citation
LANGMUIR, v. 32, NO 13, Page. 3300-3307
Abstract
The development of silicon-based anodes with high capacity and good cycling stability for next-generation lithium-ion batteries is a very challenging task due to the large volume changes in the electrodes during repeated cycling, which results in capacity fading. In this work, we synthesized silicon alloy as an active anode material, which was composed of silicon nanoparticles embedded in Cu-Al-Fe matrix phases. Poly(amide imide)s, (PAI)s, with different thermal treatments were used as polymer binders in the silicon alloy based electrodes. A systematic study demonstrated that the thermal treatment of the silicon alloy electrodes at high temperature made the electrodes mechanically strong and remarkably enhanced the cycling stability compared to electrodes without thermal treatment. The silicon alloy electrode thermally treated at 400 degrees C initially delivered a discharge capacity of 1084 rnAh g(-1) with good capacity retention and high Coulombic efficiency. This superior cycling performance was attributed to the strong adhesion of the PAI binder resulting from enhanced secondary interactions, which maintained good electrical contacts between the active materials, electronic conductors, and current collector during cycling. These findings are supported by results from X-ray photoelectron spectroscopy, scanning electron microscopy, and a surface and interfacial cutting analysis system.
URI
https://pubs.acs.org/doi/10.1021/acs.langmuir.6b00205http://hdl.handle.net/20.500.11754/49375
ISSN
0743-7463
DOI
10.1021/acs.langmuir.6b00205
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > CHEMICAL ENGINEERING(화학공학과) > Articles
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