Lithium-Powder Based Electrodes Modified with ZnI 2 for Enhanced Electrochemical Performance of Lithium-Metal Batteries
| Autor: | Aleksei Kolesnikov, Juan Pablo Badillo Jimenez, Martin Winter, Peter Bieker, Marian Cristian Stan, Dong Zhou, Martin Kolek |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Inorganic chemistry chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Electrochemistry 7. Clean energy 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry Electrode Materials Chemistry ddc:660 Lithium Lithium metal 0210 nano-technology |
| Zdroj: | Journal of the Electrochemical Society 166(8), A1400-A1407 (2019). doi:10.1149/2.0401908jes Journal of The Electrochemical Society |
| DOI: | 10.1149/2.0401908jes |
| Popis: | Lithium-powder electrodes, prepared via paste casting method using lithium powder and polyisobutylene (PIB) as a binder, were investigated for their electrochemical properties in lithium-metal cells. The electrode paste casting method allows preserving the spherical shape of lithium-powder particles during processing to electrodes. However, these lithium-powder based electrodes suffer from poor active material utilization, as electronic isolation of lithium particles during the lithium electrodissolution process was observed to occur. In order to improve the lithium inter-particle contact as well as the contact with the current collector, a simple and effective chemical modification of the lithium-powder based electrodes was considered. Using a cementation reaction with ZnI2, the growth of a Li-Zn intermetallic (“alloy”) between the lithium-powder particles and the surface of the lithium powder, lead to an increase of the active material utilization and overcame the side reactions due to lithium electrodissolution. Besides increasing the active material utilization, such simple chemical modification of the lithium-powder based electrodes improved the electrochemical performance resulting in more stable cycling behavior with low polarization and longer cycle life in both Li||Li-symmetric and Li||NMC 622 cells. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|