l-Tryptophan: Antioxidant as a Film-Forming Additive for a High-Voltage Cathode
| Autor: | Byungjin Choi, Yoon-Sok Kang, Dong Young Kim, Meiten Koh, Insun Park, Min-Sik Park, Kwangjin Park, Woon Ih Choi, Seungyeon Lee, Junyoung Mun |
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| Rok vydání: | 2020 |
| Předmět: |
Antioxidant
Materials science Scanning electron microscope medicine.medical_treatment Inorganic chemistry Tryptophan Surfaces and Interfaces Electrolyte Condensed Matter Physics Cathode law.invention chemistry.chemical_compound chemistry X-ray photoelectron spectroscopy law Electrochemistry medicine Carbonate General Materials Science Spectroscopy Voltage |
| Zdroj: | Langmuir : the ACS journal of surfaces and colloids. 36(11) |
| ISSN: | 1520-5827 |
| Popis: | l-tryptophan (TrP) was investigated as a functional film-forming additive on a lithium-rich layered oxide cathode because it has a much lower oxidation potential than other common carbonate-based electrolytes. Owing to its prior oxidation to a base electrolyte, an artificial cathode-electrolyte interphase (CEI) was formed on the cathode surface, which could be confirmed via X-ray photoelectron spectroscopy and scanning electron microscopy and verified through density functional theory calculations. The functional film formed on the cathode surface suppressed the side reactions between the cathode and electrolyte during cell cycling. As a result, the film prevented CEI thickening and performance deterioration. The optimum weight of TrP was determined to be 0.4 wt % for obtaining the best performance. |
| Databáze: | OpenAIRE |
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