| Research Title |
Effect of CMC/SBR binder content on mechanical properties and electrochemical performance for Si/graphite Anode in Lithium-Ion Batteries |
| Date of Distribution |
30 October 2023 |
| Conference |
| Title of the Conference |
The 12th Rajamangala University of Technology International Conference |
| Organiser |
Rajamangala University |
| Conference Place |
Nongnooch Tradition Center Hall |
| Province/State |
Chonburi |
| Conference Date |
30 August 2023 |
| To |
1 September 2023 |
| Proceeding Paper |
| Volume |
2023 |
| Issue |
1 |
| Page |
8-13 |
| Editors/edition/publisher |
|
| Abstract |
Silicon (Si) is a promising active material for anodes in lithium-ion batteries (LIBs). It allows for high capacity that enhances the energy density of LIBs, but high-volume expansion shortens battery life. To avoid this problem, a silicon/graphite composite is a good choice to overcome the volume expansion of silicon. Furthermore, use of a binder is another approach to decrease volume
expansion of silicon and enhance battery life. A carboxymethyl cellulose (CMC)/styrene butadiene rubber (SBR) composite is a commercial binder for anodes in water-base systems. Strong covalent bonds of CMC and the flexibility of SBR enhance electrode stability by resisting the volume expansion of silicon. However, excessive amounts of CMC or SBR affect electrode fabrication to produce unfavorable results. In the current work, a pure CMC binder achieved the highest discharge capacity while adding SBR binder reduced discharge capacity. Pure SBR binder had almost no discharge capacity in an Si/graphite anode. Tensile testing show
increased flexibility of binder films with higher SBR content. Adding CMC made the binder film more brittle which negatively impacted electrode integrity during rolling tests. We expect that the brittle nature of CMC promotes electrode cracking and peel out from the current collector in sheets. A pure SBR binder demonstrates peeling of the electrode powder from the current collector after a rolling test. CS02 (40% CMC:60% SPR) binder is the most suitable formulation of CMC and SBR. It achieves a balance between flexibility, a medium capacity, and it can be rolled into a cylindrical cell. |
| Author |
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| Peer Review Status |
มีผู้ประเมินอิสระ |
| Level of Conference |
นานาชาติ |
| Type of Proceeding |
Full paper |
| Type of Presentation |
Oral |
| Part of thesis |
true |
| Presentation awarding |
true |
| Award Title |
The best oral presentation award |
| Type of award |
รางวัลด้านวิชาการ วิชาชีพ |
| Organiser |
Rajamangala University |
| Date of awarding |
1 กันยายน 2566 |
| Attach file |
|
| Citation |
0
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Publication
Journal Publication
ไทย