Influence of the Composition and Testing Modes on the Electrochemical Performance of Li-Rich Cathode Materials
Li-rich oxides are promising cathode materials for Li-ion batteries. In this work, a number of different compositions of Li-rich materials and various electrochemical testing modes were investigated. The structure, chemical composition, and morphology of the materials synthesized were studied by XRD...
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MDPI AG
2022-11-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/12/22/4054 |
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| author | Lidia Pechen Elena Makhonina Anna Medvedeva Yury Politov Aleksander Rumyantsev Yury Koshtyal Alexander Goloveshkin Igor Eremenko |
| author_facet | Lidia Pechen Elena Makhonina Anna Medvedeva Yury Politov Aleksander Rumyantsev Yury Koshtyal Alexander Goloveshkin Igor Eremenko |
| author_sort | Lidia Pechen |
| collection | DOAJ |
| description | Li-rich oxides are promising cathode materials for Li-ion batteries. In this work, a number of different compositions of Li-rich materials and various electrochemical testing modes were investigated. The structure, chemical composition, and morphology of the materials synthesized were studied by XRD with Rietveld refinement, ICP-OES, and SEM. The particle size distributions were determined by a laser analyzer. The galvanostatic intermittent titration technique and galvanostatic cycling with different potential limits at various current densities were used to study the materials. The electrochemical study showed that gradual increase in the upper voltage limit (formation cycles) was needed to improve further cycling of the cathode materials under study. A comparison of the data obtained in different voltage ranges showed that a lower cut-off potential of 2.5 V (2.5–4.7 V range) was required for a good cyclability with a high discharge capacity. An increase in the low cut-off potential to 3.0 V (3.0–4.8 V voltage range) did not improve the electrochemical performance of the oxides and, on the contrary, considerably decreased the discharge capacity and increased the capacity fade. The LMR35 cathode material (Li<sub>1.149</sub>Ni<sub>0.184</sub>Mn<sub>0.482</sub>Co<sub>0.184</sub>O<sub>2</sub>) demonstrated the best functional properties among all the compositions studied. |
| first_indexed | 2024-03-09T18:06:14Z |
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| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T18:06:14Z |
| publishDate | 2022-11-01 |
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| series | Nanomaterials |
| spelling | doaj.art-a961e05be73a46faa4db19c2ee9973842023-11-24T09:28:54ZengMDPI AGNanomaterials2079-49912022-11-011222405410.3390/nano12224054Influence of the Composition and Testing Modes on the Electrochemical Performance of Li-Rich Cathode MaterialsLidia Pechen0Elena Makhonina1Anna Medvedeva2Yury Politov3Aleksander Rumyantsev4Yury Koshtyal5Alexander Goloveshkin6Igor Eremenko7Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, 31 Leninsky pr., 119991 Moscow, RussiaKurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, 31 Leninsky pr., 119991 Moscow, RussiaKurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, 31 Leninsky pr., 119991 Moscow, RussiaKurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, 31 Leninsky pr., 119991 Moscow, RussiaIoffe Institute of the Russian Academy of Sciences, 26 Politekhnicheskaya ul., 194021 St. Petersburg, RussiaIoffe Institute of the Russian Academy of Sciences, 26 Politekhnicheskaya ul., 194021 St. Petersburg, RussiaA.N. Nesmeyanov Institute of Organoelement Compounds of the Russian Academy of Sciences, 28 Vavilova ul., 119334 Moscow, RussiaKurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, 31 Leninsky pr., 119991 Moscow, RussiaLi-rich oxides are promising cathode materials for Li-ion batteries. In this work, a number of different compositions of Li-rich materials and various electrochemical testing modes were investigated. The structure, chemical composition, and morphology of the materials synthesized were studied by XRD with Rietveld refinement, ICP-OES, and SEM. The particle size distributions were determined by a laser analyzer. The galvanostatic intermittent titration technique and galvanostatic cycling with different potential limits at various current densities were used to study the materials. The electrochemical study showed that gradual increase in the upper voltage limit (formation cycles) was needed to improve further cycling of the cathode materials under study. A comparison of the data obtained in different voltage ranges showed that a lower cut-off potential of 2.5 V (2.5–4.7 V range) was required for a good cyclability with a high discharge capacity. An increase in the low cut-off potential to 3.0 V (3.0–4.8 V voltage range) did not improve the electrochemical performance of the oxides and, on the contrary, considerably decreased the discharge capacity and increased the capacity fade. The LMR35 cathode material (Li<sub>1.149</sub>Ni<sub>0.184</sub>Mn<sub>0.482</sub>Co<sub>0.184</sub>O<sub>2</sub>) demonstrated the best functional properties among all the compositions studied.https://www.mdpi.com/2079-4991/12/22/4054Li-rich cathode materiallithium-ion batteryvoltage and capacity fadetesting mode |
| spellingShingle | Lidia Pechen Elena Makhonina Anna Medvedeva Yury Politov Aleksander Rumyantsev Yury Koshtyal Alexander Goloveshkin Igor Eremenko Influence of the Composition and Testing Modes on the Electrochemical Performance of Li-Rich Cathode Materials Nanomaterials Li-rich cathode material lithium-ion battery voltage and capacity fade testing mode |
| title | Influence of the Composition and Testing Modes on the Electrochemical Performance of Li-Rich Cathode Materials |
| title_full | Influence of the Composition and Testing Modes on the Electrochemical Performance of Li-Rich Cathode Materials |
| title_fullStr | Influence of the Composition and Testing Modes on the Electrochemical Performance of Li-Rich Cathode Materials |
| title_full_unstemmed | Influence of the Composition and Testing Modes on the Electrochemical Performance of Li-Rich Cathode Materials |
| title_short | Influence of the Composition and Testing Modes on the Electrochemical Performance of Li-Rich Cathode Materials |
| title_sort | influence of the composition and testing modes on the electrochemical performance of li rich cathode materials |
| topic | Li-rich cathode material lithium-ion battery voltage and capacity fade testing mode |
| url | https://www.mdpi.com/2079-4991/12/22/4054 |
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