Zhu, P;
Boyce, A;
Daemi, SR;
Dong, B;
Chen, Y;
Guan, S;
Crozier, M;
... Kendrick, E; + view all
(2024)
A groovy laser processing route to achieving high power and energy lithium-ion batteries.
Energy Storage Materials
, 69
, Article 103373. 10.1016/j.ensm.2024.103373.
(In press).
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Abstract
3D-structured NMC622 with precisely controlled electrolyte channels were manufactured by incorporating femtosecond laser processing with conventional slurry casting. Demonstrated in a full cell for the first time, the 3D electrode structures mitigate plating and dendrite growth at the graphite electrode and lead to improved cycling performance, 75 % capacity retention vs 58 % after 500 cycles. 3D-structured NMC622 with a high areal capacity, 5.5 mAh cm−2, exhibits an areal capacity retention of ∼70 % and volumetric capacity exceeding 250 mAh cm−3 at ∼1.15C, three times and twice that of a conventional slurry-casted NMC622, respectively. The improved rate performance is attributed to the enhanced ionic transport and reduced charge transfer resistance facilitated by the 3D electrode structure, as shown through galvanostatic titration measurements. A finite element method-based 3D model illustrated the improved uniform distribution of Li-ion concentration and state of charge within the 3D-structured electrode. Additionally, the 3D electrode structure proved beneficial for wettability and accelerated electrolyte absorption, leading to improved manufacturing efficiency.
| Type: | Article |
|---|---|
| Title: | A groovy laser processing route to achieving high power and energy lithium-ion batteries |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.ensm.2024.103373 |
| Publisher version: | http://dx.doi.org/10.1016/j.ensm.2024.103373 |
| Language: | English |
| Additional information: | © 2024 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). |
| Keywords: | Lithium-ion battery, 3D Electrode, Laser processing, Rate capability, High energy |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10191240 |
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