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Research data supporting "Parameterization and modeling protocols for ultra-fast charging Wadsley-Roth lithium-ion batteries from coin to pouch cells"


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Dataset

Change log

This dataset was first published on 13.04.23 to include the file 'Raw cell data.zip'. An additional file (Testing programs.zip) was added on 28.04.23. Both files were added while the data files were under embargo.

Authors

Description

First zip folder contains raw battery cell data in .txt format, embodying a full study of the electrochemistry of the Wadsley-Roth structure (with Nb2O5 as its simplest composition) in different cell formats. The filename refers to the type of cell and type of test.$$ \ $$ Full low-rate electrochemical parameterization data is collected in half cells versus lithium with EIS combined with Galvanostatic Intermittent Titration Technique (GITT), reference cycles (ref), discharge rate tests (dischargerate) and voltage sweeps (VS). Full high-rate electrochemical parameterization data is acquired in 3-electrode cells versus NCA (LiNi0.8Co0.15Al0.05O2) with lithium as reference electrode with alternating pulses with increasing current (sGITT) after formation (form).$$ \ $$ Based on this, pulse (sGITT) and rate performance (chargerate and dischargerate) is modelled (model) in full coin cells (fullcell) and pouch cells (pouchcell) versus NCA. Validation (validation) is carried out with rate (chargerate and dischargerate) experiments in full coin cells and pouch cells from 0.1C to 20C. $$ \ $$ All files have time, current, voltage and capacity data and are linked to the cell parameters including electrode areal mass loading, porosity and thickness as reported in the associated publication. The publication also contains more information regarding the parameterization and modelling method used to acquire the data.

 

Second zip folder contains the cell testing program settings that were used to generate this data in .txt format. This format can also be openened with Biologic BT-lab or EC-lab cell cyling software directly. The first half of the filename refers to the type of test (linking to the data above). The second half contains extra information on specific settings. "A" and "T" mean test for anode half cell and three electrode cell respectively. "C" and "D" indicate if the test is testing (fast) charge or discharge capability respectively. "P" indicates if a predelithiation step is added before the rest of the test is started. "R" indicates that the data is collected at high resolution. "E" indicates whether the test is combined with PEIS tests. "####V" indicates the voltage window. '##C' indicates the maximum C-rate used in the test.

Version

Software / Usage instructions

Raw data exported from Biologic cyclers and processed using Python. Test programs can be openend using Biologic BT-lab or EC-lab.

Keywords

battery cells, electrochemistry, parameterization and modelling

Publisher

Sponsorship
The work was carried out as part of research activities conducted and funded by Echion Technologies Ltd.
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