Imperial College London
Portrait Picture

Dr Billy Wu

Faculty of Engineering, Dyson School of Design Engineering

Reader in Electrochemical Design Engineering
 
 
 
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Contact

 

+44 (0)20 7594 6385billy.wu Website

 
 
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Location

 

1M04Royal College of ScienceSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Yang:2022:10.1002/eem2.12252,
author = {Yang, S and Zhou, C and Wang, Q and Chen, B and Zhao, Y and Guo, B and Zhang, Z and Gao, X and Chowdhury, R and Wang, H and Lai, C and Brandon, NP and Wu, B and Liu, X},
doi = {10.1002/eem2.12252},
journal = {Energy & Environmental Materials},
pages = {1332--1339},
title = {Highlyaligned ultrathick gelbased cathodes unlocking ultrahigh energy density batteries},
url = {http://dx.doi.org/10.1002/eem2.12252},
volume = {5},
year = {2022}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - 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.
AU  - Yang,S
AU  - Zhou,C
AU  - Wang,Q
AU  - Chen,B
AU  - Zhao,Y
AU  - Guo,B
AU  - Zhang,Z
AU  - Gao,X
AU  - Chowdhury,R
AU  - Wang,H
AU  - Lai,C
AU  - Brandon,NP
AU  - Wu,B
AU  - Liu,X
DO  - 10.1002/eem2.12252
EP  - 1339
PY  - 2022///
SN  - 2575-0356
SP  - 1332
TI  - Highlyaligned ultrathick gelbased cathodes unlocking ultrahigh energy density batteries
T2  - Energy & Environmental Materials
UR  - http://dx.doi.org/10.1002/eem2.12252
UR  - https://onlinelibrary.wiley.com/doi/10.1002/eem2.12252
UR  - http://hdl.handle.net/10044/1/90825
VL  - 5
ER  -
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