Achieving High-Performance Spherical Natural Graphite Anode through a Modified Carbon Coating for Lithium-Ion Batteries
The electrochemical performance of modified natural graphite (MNG) and artificial graphite (AG) was investigated as a function of electrode density ranging from 1.55 to 1.7 g∙cm<sup>−3</sup>. The best performance was obtained at 1.55 g∙cm<sup>−3</sup> and 1.60 g∙cm<sup>...
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MDPI AG
2021-04-01
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| Online Access: | https://www.mdpi.com/1996-1073/14/7/1946 |
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| author | Hae-Jun Kwon Sang-Wook Woo Yong-Ju Lee Je-Young Kim Sung-Man Lee |
| author_facet | Hae-Jun Kwon Sang-Wook Woo Yong-Ju Lee Je-Young Kim Sung-Man Lee |
| author_sort | Hae-Jun Kwon |
| collection | DOAJ |
| description | The electrochemical performance of modified natural graphite (MNG) and artificial graphite (AG) was investigated as a function of electrode density ranging from 1.55 to 1.7 g∙cm<sup>−3</sup>. The best performance was obtained at 1.55 g∙cm<sup>−3</sup> and 1.60 g∙cm<sup>−3</sup> for the AG and MNG electrodes, respectively. Both AG, at a density of 1.55 g∙cm<sup>−3</sup>, and MNG, at a density of 1.60 g∙cm<sup>−3</sup>, showed quite similar performance with regard to cycling stability and coulombic efficiency during cycling at 30 and 45 °C, while the MNG electrodes at a density of 1.60 g∙cm<sup>−3</sup> and 1.7 g∙cm<sup>−3</sup> showed better rate performance than the AG electrodes at a density of 1.55 g∙cm<sup>−3</sup>. The superior rate capability of MNG electrodes can be explained by the following effects: first, their spherical morphology and higher electrode density led to enhanced electrical conductivity. Second, for the MNG sample, favorable electrode tortuosity was retained and thus Li+ transport in the electrode pore was not significantly affected, even at high electrode densities of 1.60 g∙cm<sup>−3</sup> and 1.7 g∙cm<sup>−3</sup>. MNG electrodes also exhibited a similar electrochemical swelling behavior to the AG electrodes. |
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| id | doaj.art-3e2aaeb7b8da4a15b83dc5bf614d18ef |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T12:41:23Z |
| publishDate | 2021-04-01 |
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| record_format | Article |
| series | Energies |
| spelling | doaj.art-3e2aaeb7b8da4a15b83dc5bf614d18ef2023-11-21T13:48:25ZengMDPI AGEnergies1996-10732021-04-01147194610.3390/en14071946Achieving High-Performance Spherical Natural Graphite Anode through a Modified Carbon Coating for Lithium-Ion BatteriesHae-Jun Kwon0Sang-Wook Woo1Yong-Ju Lee2Je-Young Kim3Sung-Man Lee4Department of Materials Science & Engineering, Kangwon National University, 1 Gangwondaehakgil, Chuncheon-Si 24341, KoreaR&D Campus, LG Energy Solution, 188 Munji-ro, Yuseong-gu, Dae-jeon-Si 34122, KoreaR&D Campus, LG Energy Solution, 188 Munji-ro, Yuseong-gu, Dae-jeon-Si 34122, KoreaR&D Campus, LG Energy Solution, 188 Munji-ro, Yuseong-gu, Dae-jeon-Si 34122, KoreaDepartment of Materials Science & Engineering, Kangwon National University, 1 Gangwondaehakgil, Chuncheon-Si 24341, KoreaThe electrochemical performance of modified natural graphite (MNG) and artificial graphite (AG) was investigated as a function of electrode density ranging from 1.55 to 1.7 g∙cm<sup>−3</sup>. The best performance was obtained at 1.55 g∙cm<sup>−3</sup> and 1.60 g∙cm<sup>−3</sup> for the AG and MNG electrodes, respectively. Both AG, at a density of 1.55 g∙cm<sup>−3</sup>, and MNG, at a density of 1.60 g∙cm<sup>−3</sup>, showed quite similar performance with regard to cycling stability and coulombic efficiency during cycling at 30 and 45 °C, while the MNG electrodes at a density of 1.60 g∙cm<sup>−3</sup> and 1.7 g∙cm<sup>−3</sup> showed better rate performance than the AG electrodes at a density of 1.55 g∙cm<sup>−3</sup>. The superior rate capability of MNG electrodes can be explained by the following effects: first, their spherical morphology and higher electrode density led to enhanced electrical conductivity. Second, for the MNG sample, favorable electrode tortuosity was retained and thus Li+ transport in the electrode pore was not significantly affected, even at high electrode densities of 1.60 g∙cm<sup>−3</sup> and 1.7 g∙cm<sup>−3</sup>. MNG electrodes also exhibited a similar electrochemical swelling behavior to the AG electrodes.https://www.mdpi.com/1996-1073/14/7/1946artificial graphitenatural graphiteelectrochemical performancenegative electrode materialLi-ion battery |
| spellingShingle | Hae-Jun Kwon Sang-Wook Woo Yong-Ju Lee Je-Young Kim Sung-Man Lee Achieving High-Performance Spherical Natural Graphite Anode through a Modified Carbon Coating for Lithium-Ion Batteries Energies artificial graphite natural graphite electrochemical performance negative electrode material Li-ion battery |
| title | Achieving High-Performance Spherical Natural Graphite Anode through a Modified Carbon Coating for Lithium-Ion Batteries |
| title_full | Achieving High-Performance Spherical Natural Graphite Anode through a Modified Carbon Coating for Lithium-Ion Batteries |
| title_fullStr | Achieving High-Performance Spherical Natural Graphite Anode through a Modified Carbon Coating for Lithium-Ion Batteries |
| title_full_unstemmed | Achieving High-Performance Spherical Natural Graphite Anode through a Modified Carbon Coating for Lithium-Ion Batteries |
| title_short | Achieving High-Performance Spherical Natural Graphite Anode through a Modified Carbon Coating for Lithium-Ion Batteries |
| title_sort | achieving high performance spherical natural graphite anode through a modified carbon coating for lithium ion batteries |
| topic | artificial graphite natural graphite electrochemical performance negative electrode material Li-ion battery |
| url | https://www.mdpi.com/1996-1073/14/7/1946 |
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