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Highly‐aligned ultra‐thick gel‐based cathodes unlocking ultra‐high energy density batteries
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![]() | Accepted version | 11.79 MB | Adobe PDF | View/Open |
Title: | Highly‐aligned ultra‐thick gel‐based cathodes unlocking ultra‐high energy density batteries |
Authors: | Yang, S Zhou, C Wang, Q Chen, B Zhao, Y Guo, B Zhang, Z Gao, X Chowdhury, R Wang, H Lai, C Brandon, NP Wu, B Liu, X |
Item Type: | Journal Article |
Abstract: | Increasing electrode thickness can substantially enhance the specific energy of lithium-ion batteries, however ionic transport, electronic conductivity and ink rheology are current barriers to adoption. Here a novel approach using a mixed xanthan gum and locust bean gum binder to construct ultra-thick electrodes is proposed to address above issues. After combining aqueous binder with single walled carbon nanotubes (SWCNT), active material (LiNi0.8Co0.1Mn0.1O2) and subsequent vacuum freeze drying, highly-aligned and low tortuosity structures with a porosity of ca. 50% can be achieved with an average pore size of 10 μm, whereby the gum binder-SWCNT-NMC811 forms vertical structures supported by tissue-like binder/SWCNT networks allowing for excellent electronic conducting phase percolation. As a result, ultra-thick electrodes with a mass loading of about 511 mg·cm-2 and 99.5 wt% active materials have been demonstrated with a remarkable areal capacity of 79.3 mAh·cm−2, which is the highest value reported so far. This represents a >25x improvement compared to conventional electrodes with an areal capacity of about 3 mAh·cm-2. This route also can be expanded to other electrode materials, such as LiFePO4 and Li4Ti5O12, and thus opens the possibility for low-cost and sustainable ultra-thick electrodes with increased specific energy for future lithium-ion batteries. |
Issue Date: | 1-Oct-2022 |
Date of Acceptance: | 1-Aug-2021 |
URI: | http://hdl.handle.net/10044/1/90825 |
DOI: | 10.1002/eem2.12252 |
ISSN: | 2575-0356 |
Publisher: | Wiley |
Start Page: | 1332 |
End Page: | 1339 |
Journal / Book Title: | Energy & Environmental Materials |
Volume: | 5 |
Issue: | 4 |
Copyright Statement: | Copyright reserved |
Keywords: | Science & Technology Technology Materials Science, Multidisciplinary Materials Science binder gel-based cathodes high areal capacity lithium-ion battery ultra-thick electrodes LI-ION BATTERY LITHIUM ELECTRODES PERFORMANCE BINDERS CHARGE COST |
Publication Status: | Published |
Open Access location: | https://onlinelibrary.wiley.com/doi/10.1002/eem2.12252 |
Article Number: | eem2.12252 |
Online Publication Date: | 2021-08-02 |
Appears in Collections: | Mechanical Engineering Dyson School of Design Engineering Faculty of Engineering |