Abstract
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.
Highlights
Sony introduced a high-voltage and high-energy density lithium-ion battery (LIB) that consists of amorphous carbon as anode and lithium cobalt oxide, LiCoO2, as cathode material more than 28 years ago
The ablation depth is almost equal to the layer thickness and the laser ablation process does not structured cathodes were analyzed for unstructured and laser structured samples
For lithium-ion battery manufacturing, ultrafast laser structuring of composite electrodes offers lithium-ion batterythe manufacturing, laser structuring composite offers great For advantages regarding improvement ultrafast of cell performance such asofan increasedelectrodes battery lifetime great advantages thehigh improvement cell performance suchshown as anthat increased battery and improved cycleregarding retention for charging andofdischarging rates
Summary
Sony introduced a high-voltage and high-energy density lithium-ion battery (LIB) that consists of amorphous carbon as anode and lithium cobalt oxide, LiCoO2 , as cathode material more than 28 years ago. The public demand for high power energy storage systems is on a continuous ascending path. Lithium-ion batteries (LIBs) have become an essential tool for the storage of electric energy [1,2,3]. For high power and high energy applications in full electrical vehicles, numerous lithium-ion pouch cells are used with capacities of each larger than. It is assumed that the further development of LIB technology will provide an energy storage concept that will meet the requirements of the automotive industry, in terms of energy and power density [5]
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