Journal
APPLIED SCIENCES-BASEL
Volume 9, Issue 17, Pages -Publisher
MDPI
DOI: 10.3390/app9173588
Keywords
3D battery; laser ablation; diffusion coefficient; lithium-ion batteries; LiCoO2
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Funding
- German Research Foundation (DFG) [392322200]
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Quantitative experiments of lithiation/delithiation rates were considered for a better understanding of electrochemical intercalation/deintercalation processes in laser structured thick film cathodes. Besides galvanostatic cycling for evaluation of specific discharge capacities, a suitable quantitative approach for determining the rate of Li-ion insertion in the active material and the rate of Li-ion transport in the electrolyte is expressed by chemical diffusion coefficient values. For this purpose, the galvanostatic intermittent titration technique has been involved. It could be shown that laser structured electrodes provide an enhanced chemical diffusion coefficient and an improved capacity retention at high charging and discharging rates.
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