Practical Approaches to Apply Ultra-Thick Graphite Anode to High-Energy Lithium-Ion Battery: Carbonization and 3-Dimensionalization
Lithium-ion batteries with ultra-thick electrodes have high energy density and low manufacturing costs because of the reduction of the inactive materials in the same battery volume. However, the partial usage of the full capacity and the low rate capability are caused by poor ionic and electronic co...
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MDPI AG
2022-07-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/12/15/2625 |
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| author | Junsu Park Seokho Suh Sigitas Tamulevičius Daesoo Kim Dongin Choi Sungho Jeong Hyeong-Jin Kim |
| author_facet | Junsu Park Seokho Suh Sigitas Tamulevičius Daesoo Kim Dongin Choi Sungho Jeong Hyeong-Jin Kim |
| author_sort | Junsu Park |
| collection | DOAJ |
| description | Lithium-ion batteries with ultra-thick electrodes have high energy density and low manufacturing costs because of the reduction of the inactive materials in the same battery volume. However, the partial usage of the full capacity and the low rate capability are caused by poor ionic and electronic conduction. In this work, the effects of two approaches, such as electrode binder carbonization by heat treatment and 3-dimensionalization by the laser structuring of ultra-thick graphite anodes to lithium-ion batteries for high energy density, are investigated. During the heat treatment, the polyvinylidene fluoride (PVDF) binder is carbonized to form fluorinated graphitic carbons, thereby increasing the number of lithium-ion storage sites and the improvement of the electrode capacity by 14% (420 mAh g<sup>−1</sup> and 20 mAh cm<sup>−2</sup>). Further, the carbonization improves the rate capability by 31% at 0.1 C by simultaneously reducing the ionic and electronic resistances. Furthermore, after the laser structuring of the carbonized electrode, the areal discharge capacity increases to 50% at the increasing current rates, resulting from drastically improved ionic conduction. In addition to the electrochemical characteristics, these two approaches contribute considerably to the fast wetting of the electrolyte into the ultra-thick electrode. The carbonization and laser structuring of the ultra-thick graphite anodes are practical approaches for high-energy batteries to overcome the thickness limitation. |
| first_indexed | 2024-03-09T12:20:25Z |
| format | Article |
| id | doaj.art-ff671a909aba40cf9c9fbfd994984308 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T12:20:25Z |
| publishDate | 2022-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-ff671a909aba40cf9c9fbfd9949843082023-11-30T22:42:39ZengMDPI AGNanomaterials2079-49912022-07-011215262510.3390/nano12152625Practical Approaches to Apply Ultra-Thick Graphite Anode to High-Energy Lithium-Ion Battery: Carbonization and 3-DimensionalizationJunsu Park0Seokho Suh1Sigitas Tamulevičius2Daesoo Kim3Dongin Choi4Sungho Jeong5Hyeong-Jin Kim6Ground Technology Research Institute, Agency for Defense Development, Yuseong-gu, P.O. Box 35, Daejeon 34186, KoreaGraduate School of Energy Convergence, Institute of Integrated Technology, Gwangju Institute of Science and Technology, 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, KoreaInstitute of Materials Science of Kaunas, University of Technology, Barsausko St. 59, LT-51423 Kaunas, LithuaniaLG Energy Solution, Ltd., 188 Munji-ro, Yuseong-gu, Daejeon 34122, KoreaLG Energy Solution, Ltd., 188 Munji-ro, Yuseong-gu, Daejeon 34122, KoreaSchool of Mechanical Engineering, Gwangju Institute of Science and Technology, 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, KoreaGraduate School of Energy Convergence, Institute of Integrated Technology, Gwangju Institute of Science and Technology, 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, KoreaLithium-ion batteries with ultra-thick electrodes have high energy density and low manufacturing costs because of the reduction of the inactive materials in the same battery volume. However, the partial usage of the full capacity and the low rate capability are caused by poor ionic and electronic conduction. In this work, the effects of two approaches, such as electrode binder carbonization by heat treatment and 3-dimensionalization by the laser structuring of ultra-thick graphite anodes to lithium-ion batteries for high energy density, are investigated. During the heat treatment, the polyvinylidene fluoride (PVDF) binder is carbonized to form fluorinated graphitic carbons, thereby increasing the number of lithium-ion storage sites and the improvement of the electrode capacity by 14% (420 mAh g<sup>−1</sup> and 20 mAh cm<sup>−2</sup>). Further, the carbonization improves the rate capability by 31% at 0.1 C by simultaneously reducing the ionic and electronic resistances. Furthermore, after the laser structuring of the carbonized electrode, the areal discharge capacity increases to 50% at the increasing current rates, resulting from drastically improved ionic conduction. In addition to the electrochemical characteristics, these two approaches contribute considerably to the fast wetting of the electrolyte into the ultra-thick electrode. The carbonization and laser structuring of the ultra-thick graphite anodes are practical approaches for high-energy batteries to overcome the thickness limitation.https://www.mdpi.com/2079-4991/12/15/2625lithium-ion batteriesthick electrodesgraphite anodesbinder carbonizationlaser structuring |
| spellingShingle | Junsu Park Seokho Suh Sigitas Tamulevičius Daesoo Kim Dongin Choi Sungho Jeong Hyeong-Jin Kim Practical Approaches to Apply Ultra-Thick Graphite Anode to High-Energy Lithium-Ion Battery: Carbonization and 3-Dimensionalization Nanomaterials lithium-ion batteries thick electrodes graphite anodes binder carbonization laser structuring |
| title | Practical Approaches to Apply Ultra-Thick Graphite Anode to High-Energy Lithium-Ion Battery: Carbonization and 3-Dimensionalization |
| title_full | Practical Approaches to Apply Ultra-Thick Graphite Anode to High-Energy Lithium-Ion Battery: Carbonization and 3-Dimensionalization |
| title_fullStr | Practical Approaches to Apply Ultra-Thick Graphite Anode to High-Energy Lithium-Ion Battery: Carbonization and 3-Dimensionalization |
| title_full_unstemmed | Practical Approaches to Apply Ultra-Thick Graphite Anode to High-Energy Lithium-Ion Battery: Carbonization and 3-Dimensionalization |
| title_short | Practical Approaches to Apply Ultra-Thick Graphite Anode to High-Energy Lithium-Ion Battery: Carbonization and 3-Dimensionalization |
| title_sort | practical approaches to apply ultra thick graphite anode to high energy lithium ion battery carbonization and 3 dimensionalization |
| topic | lithium-ion batteries thick electrodes graphite anodes binder carbonization laser structuring |
| url | https://www.mdpi.com/2079-4991/12/15/2625 |
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