Electrostatic Dual-Layer Solvent-Free Cathodes for High-Performance Lithium-Ion Batteries
Slurry-cast (SLC) electrode manufacturing faces problems such as thickness limitation and material stratification, which are caused by applying toxic organic solvents. Solvent-free electrode technology, as a sustainable alternative, could get rid of issues generated by solvents. In this study, dual-...
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MDPI AG
2025-06-01
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| Online Access: | https://www.mdpi.com/1996-1073/18/12/3112 |
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| author | Haojin Guo Chengrui Zhang Yujie Ma Ning Liu Zhifeng Wang |
| author_facet | Haojin Guo Chengrui Zhang Yujie Ma Ning Liu Zhifeng Wang |
| author_sort | Haojin Guo |
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| description | Slurry-cast (SLC) electrode manufacturing faces problems such as thickness limitation and material stratification, which are caused by applying toxic organic solvents. Solvent-free electrode technology, as a sustainable alternative, could get rid of issues generated by solvents. In this study, dual-layer NCM811 solvent-free electrodes (DLEs) are fabricated via an electrostatic powder deposition method with an active material-rich upper layer to provide high energy output, while the more binder–conductor content base layer improves conductivity and contact with current collectors. The dual-layered structure overwhelms the single-layer electrode (SE) with stable cycling performance caused by more regulated pore structures. DLE maintains 74% capacity retention after 100 cycles at 0.3 C, while the SLC shows only 60% capacity retention. Additionally, DLE shows excellent rate performance at various rates, with 207.3 mAh g<sup>−1</sup>, 193.9 mAh g<sup>−1</sup>, 173.9 mAh g<sup>−1</sup>, 157.3 mAh g<sup>−1</sup>, and 120.4 mAh g<sup>−1</sup> at 0.1 C, 0.2 C, 0.5 C, 1.0 C, and 2.0 C, respectively. The well-designed DLE cathodes exhibit superior discharge-specific capacities, rate performance, and improved cycling stability than traditional SLC cathodes. It enlightens the path toward new structure innovations of solvent-free electrodes. |
| format | Article |
| id | doaj-art-d2c934fcdcb94d25b3cc2109c4d7b71f |
| institution | OA Journals |
| issn | 1996-1073 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | MDPI AG |
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| series | Energies |
| spelling | doaj-art-d2c934fcdcb94d25b3cc2109c4d7b71f2025-08-20T02:24:38ZengMDPI AGEnergies1996-10732025-06-011812311210.3390/en18123112Electrostatic Dual-Layer Solvent-Free Cathodes for High-Performance Lithium-Ion BatteriesHaojin Guo0Chengrui Zhang1Yujie Ma2Ning Liu3Zhifeng Wang4School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, ChinaSchool of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, ChinaSchool of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, ChinaSchool of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, ChinaSchool of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, ChinaSlurry-cast (SLC) electrode manufacturing faces problems such as thickness limitation and material stratification, which are caused by applying toxic organic solvents. Solvent-free electrode technology, as a sustainable alternative, could get rid of issues generated by solvents. In this study, dual-layer NCM811 solvent-free electrodes (DLEs) are fabricated via an electrostatic powder deposition method with an active material-rich upper layer to provide high energy output, while the more binder–conductor content base layer improves conductivity and contact with current collectors. The dual-layered structure overwhelms the single-layer electrode (SE) with stable cycling performance caused by more regulated pore structures. DLE maintains 74% capacity retention after 100 cycles at 0.3 C, while the SLC shows only 60% capacity retention. Additionally, DLE shows excellent rate performance at various rates, with 207.3 mAh g<sup>−1</sup>, 193.9 mAh g<sup>−1</sup>, 173.9 mAh g<sup>−1</sup>, 157.3 mAh g<sup>−1</sup>, and 120.4 mAh g<sup>−1</sup> at 0.1 C, 0.2 C, 0.5 C, 1.0 C, and 2.0 C, respectively. The well-designed DLE cathodes exhibit superior discharge-specific capacities, rate performance, and improved cycling stability than traditional SLC cathodes. It enlightens the path toward new structure innovations of solvent-free electrodes.https://www.mdpi.com/1996-1073/18/12/3112lithium-ion batterysolvent-free manufacturingdual-layercathode |
| spellingShingle | Haojin Guo Chengrui Zhang Yujie Ma Ning Liu Zhifeng Wang Electrostatic Dual-Layer Solvent-Free Cathodes for High-Performance Lithium-Ion Batteries Energies lithium-ion battery solvent-free manufacturing dual-layer cathode |
| title | Electrostatic Dual-Layer Solvent-Free Cathodes for High-Performance Lithium-Ion Batteries |
| title_full | Electrostatic Dual-Layer Solvent-Free Cathodes for High-Performance Lithium-Ion Batteries |
| title_fullStr | Electrostatic Dual-Layer Solvent-Free Cathodes for High-Performance Lithium-Ion Batteries |
| title_full_unstemmed | Electrostatic Dual-Layer Solvent-Free Cathodes for High-Performance Lithium-Ion Batteries |
| title_short | Electrostatic Dual-Layer Solvent-Free Cathodes for High-Performance Lithium-Ion Batteries |
| title_sort | electrostatic dual layer solvent free cathodes for high performance lithium ion batteries |
| topic | lithium-ion battery solvent-free manufacturing dual-layer cathode |
| url | https://www.mdpi.com/1996-1073/18/12/3112 |
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