Effect of Cathode Microstructure on Electrochemical Properties of Sodium Nickel-Iron Chloride Batteries
| Autor: | Jong-Jin Choi, Yangdo Kim, Joon-Hwan Choi, Byeong-Min Ahn, Sung-Ki Lim, Cheol-Woo Ahn, Byung-Dong Hahn |
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| Rok vydání: | 2021 |
| Předmět: |
Battery (electricity)
Technology Materials science Sodium microstructure chemistry.chemical_element Electrolyte Electrochemistry Article law.invention iron law General Materials Science granule density cycle retention Microscopy QC120-168.85 sodium nickel chloride low cost QH201-278.5 Engineering (General). Civil engineering (General) Microstructure Cathode TK1-9971 Nickel Descriptive and experimental mechanics chemistry Chemical engineering cell capacity battery durability Lithium NaCl size Electrical engineering. Electronics. Nuclear engineering TA1-2040 |
| Zdroj: | Materials Materials, Vol 14, Iss 5605, p 5605 (2021) Volume 14 Issue 19 |
| ISSN: | 1996-1944 |
| Popis: | Sodium metal chloride batteries have become a substantial focus area in the research on prospective alternatives for battery energy storage systems (BESSs) since they are more stable than lithium ion batteries. This study demonstrates the effects of the cathode microstructure on the electrochemical properties of sodium metal chloride cells. The cathode powder is manufactured in the form of granules composed of a metal active material and NaCl, and the ionic conductivity is attained by filling the interiors of the granules with a second electrolyte (NaAlCl4). Thus, the microstructure of the cathode powder had to be optimized to ensure that the second electrolyte effectively penetrated the cathode granules. The microstructure was modified by selecting the NaCl size and density of the cathode granules, and the resulting Na/(Ni,Fe)Cl2 cell showed a high capacity of 224 mAh g−1 at the 100th cycle owing to microstructural improvements. These findings demonstrate that control of the cathode microstructure is essential when cathode powders are used to manufacture sodium metal chloride batteries. |
| Databáze: | OpenAIRE |
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