High-areal-capacity Na-ion battery electrode with uncompromised energy and power densities by simultaneous electrospinning-spraying fabrication
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| Main Authors: | , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866910571999264768 |
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| author | Ouyang, Mengzheng Guo, Zhenyu Salinas-Farran, Luis E Zhao, Yan Zhao, Siyu Zheng, Kaitian Zhang, Hao Wang, Mengnan Li, Guangdong Li, Feiran Liu, Xinhua Yang, Shichun Xie, Fei Shearing, Paul R. Titirici, Maria-Magdalena Brandon, Nigel P. |
| author_facet | Ouyang, Mengzheng Guo, Zhenyu Salinas-Farran, Luis E Zhao, Yan Zhao, Siyu Zheng, Kaitian Zhang, Hao Wang, Mengnan Li, Guangdong Li, Feiran Liu, Xinhua Yang, Shichun Xie, Fei Shearing, Paul R. Titirici, Maria-Magdalena Brandon, Nigel P. |
| contents | Sodium-ion batteries (SIBs) are cost-effective alternatives to lithium-ion batteries (LIBs), but their low energy density remains a challenge. Current electrode designs fail to simultaneously achieve high areal loading, high active content, and superior performance. In response, this work introduces an ideal electrode structure, featuring a continuous conductive network with active particles securely trapped in the absence of binder, fabricated using a universal technique that combines electrospinning and electrospraying (co-ESP). We found that the particle size must be larger than the network's pores for optimised performance, an aspect overlooked in previous research. The free-standing co-ESP Na2V3(PO4)3 (NVP) cathodes demonstrated state-of-the-art 296 mg cm-2 areal loading with 97.5 wt.% active content, as well as remarkable rate-performance and cycling stability. Co-ESP full cells showed uncompromised energy and power densities (231.6 Wh kg-1 and 7152.6 W kg-1), leading among reported SIBs with industry-relevant areal loadings. The structural merit is analysed using multi-scale X-ray computed tomography, providing valuable design insights.Finally, the superior performance is validated in the pouch cells, highlighting the electrode's scalability and potential for commercial application. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_11655 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | High-areal-capacity Na-ion battery electrode with uncompromised energy and power densities by simultaneous electrospinning-spraying fabrication Ouyang, Mengzheng Guo, Zhenyu Salinas-Farran, Luis E Zhao, Yan Zhao, Siyu Zheng, Kaitian Zhang, Hao Wang, Mengnan Li, Guangdong Li, Feiran Liu, Xinhua Yang, Shichun Xie, Fei Shearing, Paul R. Titirici, Maria-Magdalena Brandon, Nigel P. Materials Science Sodium-ion batteries (SIBs) are cost-effective alternatives to lithium-ion batteries (LIBs), but their low energy density remains a challenge. Current electrode designs fail to simultaneously achieve high areal loading, high active content, and superior performance. In response, this work introduces an ideal electrode structure, featuring a continuous conductive network with active particles securely trapped in the absence of binder, fabricated using a universal technique that combines electrospinning and electrospraying (co-ESP). We found that the particle size must be larger than the network's pores for optimised performance, an aspect overlooked in previous research. The free-standing co-ESP Na2V3(PO4)3 (NVP) cathodes demonstrated state-of-the-art 296 mg cm-2 areal loading with 97.5 wt.% active content, as well as remarkable rate-performance and cycling stability. Co-ESP full cells showed uncompromised energy and power densities (231.6 Wh kg-1 and 7152.6 W kg-1), leading among reported SIBs with industry-relevant areal loadings. The structural merit is analysed using multi-scale X-ray computed tomography, providing valuable design insights.Finally, the superior performance is validated in the pouch cells, highlighting the electrode's scalability and potential for commercial application. |
| title | High-areal-capacity Na-ion battery electrode with uncompromised energy and power densities by simultaneous electrospinning-spraying fabrication |
| topic | Materials Science |
| url | https://arxiv.org/abs/2408.11655 |