Enhancing rate capability of graphite anodes for lithium-ion batteries by pore-structuring
For the development of high-performance lithium-ion batteries (LIBs), numerous studies on 3-dimensionalized electrode structures have been conducted to improve the ionic diffusion, rate performance, and electrolyte wetting ability. Due to the decrease in ionic polarization, structured electrodes sho...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-12-01
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| Series: | Applied Surface Science Advances |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666523921001148 |
| _version_ | 1818388620411666432 |
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| author | Daeun Jang Seokho Suh Hocheol Yoon Jihun Kim Hyunsu Kim Juyeon Baek Hyeong-Jin Kim |
| author_facet | Daeun Jang Seokho Suh Hocheol Yoon Jihun Kim Hyunsu Kim Juyeon Baek Hyeong-Jin Kim |
| author_sort | Daeun Jang |
| collection | DOAJ |
| description | For the development of high-performance lithium-ion batteries (LIBs), numerous studies on 3-dimensionalized electrode structures have been conducted to improve the ionic diffusion, rate performance, and electrolyte wetting ability. Due to the decrease in ionic polarization, structured electrodes show much higher capacity retention compared to typical electrodes, especially at high current rates. In this study, pore-structured graphite (Gr) electrodes were synthesized using pore-formation agent particles (polytetrafluoroethylene (PTFE)), which possess a unique thermal unzipping property. After the heat treatment, the PTFE particles were depolymerized to form micro-sized pores. The effect of the 3-dimensionalized electrode structure on the electrochemical properties was investigated in detail. As a result, it was observed that the rate capability and cycle life of pore-structured Gr electrodes enhanced owing to their improved physical properties, such as wetting ability and shortened ionic diffusion pathways. Because our approach does not require changes in the existing electrode chemistry and slurry process, it is one of the most cost-effective and applicable ways to improve fast charging capability. |
| first_indexed | 2024-12-14T04:28:44Z |
| format | Article |
| id | doaj.art-656a999cd3214206aa381a394f8cc60e |
| institution | Directory Open Access Journal |
| issn | 2666-5239 |
| language | English |
| last_indexed | 2024-12-14T04:28:44Z |
| publishDate | 2021-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Applied Surface Science Advances |
| spelling | doaj.art-656a999cd3214206aa381a394f8cc60e2022-12-21T23:17:08ZengElsevierApplied Surface Science Advances2666-52392021-12-016100168Enhancing rate capability of graphite anodes for lithium-ion batteries by pore-structuringDaeun Jang0Seokho Suh1Hocheol Yoon2Jihun Kim3Hyunsu Kim4Juyeon Baek5Hyeong-Jin Kim6Graduate School of Energy Convergence, Institute of Integrated Technology, Gwangju Institute of Science and Technology, 123 Cheomdangwagi-ro, Buk-gu, Gwangju, 61005, South KoreaGraduate School of Energy Convergence, Institute of Integrated Technology, Gwangju Institute of Science and Technology, 123 Cheomdangwagi-ro, Buk-gu, Gwangju, 61005, South KoreaGraduate School of Energy Convergence, Institute of Integrated Technology, Gwangju Institute of Science and Technology, 123 Cheomdangwagi-ro, Buk-gu, Gwangju, 61005, South KoreaGwangju Bio/Energy R&D Center, Korea Institute of Energy Research (KIER), 270-25 Samso-ro, Buk-gu, Gwangju, 61003, South KoreaGraduate School of Energy Convergence, Institute of Integrated Technology, Gwangju Institute of Science and Technology, 123 Cheomdangwagi-ro, Buk-gu, Gwangju, 61005, South KoreaGraduate School of Energy Convergence, Institute of Integrated Technology, Gwangju Institute of Science and Technology, 123 Cheomdangwagi-ro, Buk-gu, Gwangju, 61005, South KoreaGraduate School of Energy Convergence, Institute of Integrated Technology, Gwangju Institute of Science and Technology, 123 Cheomdangwagi-ro, Buk-gu, Gwangju, 61005, South Korea; Corresponding author.For the development of high-performance lithium-ion batteries (LIBs), numerous studies on 3-dimensionalized electrode structures have been conducted to improve the ionic diffusion, rate performance, and electrolyte wetting ability. Due to the decrease in ionic polarization, structured electrodes show much higher capacity retention compared to typical electrodes, especially at high current rates. In this study, pore-structured graphite (Gr) electrodes were synthesized using pore-formation agent particles (polytetrafluoroethylene (PTFE)), which possess a unique thermal unzipping property. After the heat treatment, the PTFE particles were depolymerized to form micro-sized pores. The effect of the 3-dimensionalized electrode structure on the electrochemical properties was investigated in detail. As a result, it was observed that the rate capability and cycle life of pore-structured Gr electrodes enhanced owing to their improved physical properties, such as wetting ability and shortened ionic diffusion pathways. Because our approach does not require changes in the existing electrode chemistry and slurry process, it is one of the most cost-effective and applicable ways to improve fast charging capability.http://www.sciencedirect.com/science/article/pii/S2666523921001148Lithium-ion batteriesFast chargingGraphite anodesPore-structuringIonic diffusion |
| spellingShingle | Daeun Jang Seokho Suh Hocheol Yoon Jihun Kim Hyunsu Kim Juyeon Baek Hyeong-Jin Kim Enhancing rate capability of graphite anodes for lithium-ion batteries by pore-structuring Applied Surface Science Advances Lithium-ion batteries Fast charging Graphite anodes Pore-structuring Ionic diffusion |
| title | Enhancing rate capability of graphite anodes for lithium-ion batteries by pore-structuring |
| title_full | Enhancing rate capability of graphite anodes for lithium-ion batteries by pore-structuring |
| title_fullStr | Enhancing rate capability of graphite anodes for lithium-ion batteries by pore-structuring |
| title_full_unstemmed | Enhancing rate capability of graphite anodes for lithium-ion batteries by pore-structuring |
| title_short | Enhancing rate capability of graphite anodes for lithium-ion batteries by pore-structuring |
| title_sort | enhancing rate capability of graphite anodes for lithium ion batteries by pore structuring |
| topic | Lithium-ion batteries Fast charging Graphite anodes Pore-structuring Ionic diffusion |
| url | http://www.sciencedirect.com/science/article/pii/S2666523921001148 |
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