A comparative study on binders for the expanded mesocarbon microbeads as the positive electrodes of lithium-ion capacitors
| Autor: | Tien-Yu Yi, Chi-Chang Hu, Cheng-Wei Tai |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Aqueous solution
Materials science Renewable Energy Sustainability and the Environment Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Capacitance 0104 chemical sciences Carboxymethyl cellulose chemistry.chemical_compound chemistry Chemical engineering X-ray photoelectron spectroscopy Electrode medicine Lithium Electrical and Electronic Engineering Physical and Theoretical Chemistry 0210 nano-technology medicine.drug Acrylic acid |
| Zdroj: | Journal of Power Sources. 501:230029 |
| ISSN: | 0378-7753 |
| DOI: | 10.1016/j.jpowsour.2021.230029 |
| Popis: | Poly(vinylidene fluoride) (PVdF), carboxymethyl cellulose (CMC), and half-sodiated poly(acrylic acid) (PAANa) are typically selected to examine the influences of polymeric binders on the charge storage performances of expanded mesocarbon microbeads (EMCMB) as the positive electrode in the lithium-ion capacitors (LICs). The surface composition of various EMCMB-coated electrodes before and after electrochemical activation are examined by X-ray photoelectron spectroscopy (XPS). The enhanced and reversible capacitance of EMCMB electrodes after electrochemical activation is examined by various electrochemical tests. In comparison with the electrode using PVdF, electrochemically activated EMCMB electrodes with the aqueous binders show a lower onset potential of electrochemical activation and a lower contact resistance. Both aqueous binders can increase the micro-porosity and specific capacitance of EMCMBs, confirmed by the electrochemical impedance spectroscopic (EIS) test although the electrode using PVdF shows better capacitance retention in the 1000-cycle test. |
| Databáze: | OpenAIRE |
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