Solid-state conversion of metal oleate precursors for the preparation of LiNi1/3Co1/3Mn1/3O2 as cathode material for lithium-ion batteries
| Autor: | Jinwoo Lee, Jin Joo, Dongyub Kwak, In Woo Cheong, Won-Gwang Lim, Kyuchul Shin |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
General Chemical Engineering chemistry.chemical_element 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Electrochemistry Cathode law.invention Anode Dielectric spectroscopy Metal 020401 chemical engineering chemistry Chemical engineering law visual_art visual_art.visual_art_medium Lithium Calcination 0204 chemical engineering Cyclic voltammetry 0210 nano-technology |
| Zdroj: | Korean Journal of Chemical Engineering. 37:1258-1265 |
| ISSN: | 1975-7220 0256-1115 |
| DOI: | 10.1007/s11814-020-0537-y |
| Popis: | A solid-state conversion process for the preparation of LiNi1/3Co1/3Mn1/3O2 (NCM333) using metal oleate precursors was studied. The low melting points of metal oleate complexes result in a highly homogeneous mixture of Li-, Ni-, Co-, and Mn-oleates before calcination at a high temperature in a solid-state conversion process. The discharge capacity and capacity retention were assessed using a control sample prepared with metal acetate precursors. Cyclic voltammetry and electrochemical impedance spectroscopy showed larger cathodic and anodic peak currents and a lower charge transfer resistance for the coin cell with the cathode prepared from metal oleates than for the cell with the cathode prepared from metal acetates. The superior electrochemical properties of the NCM333 cathode prepared by the solid-state conversion process suggested in this study are attributed to the formation of a perfect $$R\overline 3 m$$ layered structure with a low degree of cation mixing. |
| Databáze: | OpenAIRE |
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