OPARA dataset for publication "Evaluation of the tensile adhesion strength of cathode coatings from spent lithium-ion batteries using a centrifugal method"
	
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		General Info: Per data point in the publication 7 to 8 samples were observed through a tensile adhesion test and microcopic imaging with subsequent image analysis.
		Each sample corresponds to two microscopic original images and one or two processed images in this data set.
		The adhesion analyser can test up to 8 samples at once, so each data point in the publication corresponds to one data sheet from the adhesion analyser.
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1.1)	Content of this dataset:
		- "CATHODE ADHESION CENTRIFUGAL METHOD_SUPPLEMENTARY INFORMATION.pdf" as supplementary information for the publication with general information and appendixes which are reffered to in the publication
		- Five .xlsx files ("Figure 4" until "Figure 8") with tables including data of which the digrams in fig. 4-8 of the publication are generated
		- Compressed Archive "LUMiFrac Analysis Data Sheets.zip" with .xlsx file data sheets of each tensile adhesion test (centrifugal force was copied from the data sheets to be included in "Figure" .xlsx files)
		- Compressed Archive "Digital Microscope Images.zip" with .tiff images from digital microscopy and edited images in .tif format (image analysis gerates data for area of adhesive rupture and area of total rupture, cf. 2.3.3))

1.2)	Folder structure of archives:
		# "Digital Microscope Images"
		## Folder for corresponding figure in publication (for example "Figure 5")
		### Folder for corresponding data point or test (for example "Dwell Time 0.5 h Test")
		#### "Plate"/ "Stamp" (generally 2 images per sample were taken: "stamp" = torn of sample on piston after tensile adhesion tests, and "plate" = remaining sample on sample holder)
		##### "10 mm ROI 8 Bit": Processed images* (greyscale with already defined ROI) were saved here
		*: Fractured area analysis was undertaken for Figures 4 to 6 only to determine the area of adhesive failure, therefore only "plates" were processed
		# LUMiFrac Analysis Data Sheets
		## Folder for corresponding figure in publication (incl. Appendixes 1 and 2)

1.3)	Information on sample tagging:
		- Each tensile adhesion test was undertaken with 8 samples at once, resulting in a tag ending "K1" to "K8" (K for German "Kathode")
		- Sample sets of tests for Figures 4 to 6 are tagged by the variation of the parameter (for example: 1h-K1 stands for "1h dwell time variation Kathode Sample Number 1")
		- Sample sets of tests for Figure 7 are tagged with MC for "Method Check"
		- Sample Sets of tests for Figure 8 are tagged with C1 for "Cell 1", TV for "Temperature Variation", three digit number for temperature in °C, Res for "Resin" as reference to the sample preparation method
		
2.1)	Equipment used for generation of data in this publication:
		- LUMiFrac Adhesion Analyzer 200.1-90, LUM GmbH, Berlin, Germany
		- Digital Microscope DST-1028 5MP, Bresser, Rhede, Germany

2.2)	Software used for generation of data in this publication:
		- SEPView 7 (version 7.6.0/563de9c1) for operation of LUMiFrac
		- CamLabLite (version Windows x64 2.1.22328.20230326) for operation of Digital Microscope
		- Fiji ImageJ versions 1.54j, 1.54k, 1.54l and 1.54m for processing and analyzing images generated by Digital Microscope

2.3.1)	LUMiFrac settings:
		- Can be viewed for each test in the corresponding .xlsx analysis data sheet in the LUMiFrac archive

2.3.2)	Digital Microscope settings:
		- Resolution=2592*1944; Color Temp.=4600; Hue=0; Saturation=50; Brightness=0; AC=50Hz
		- Lighting wheel always turned to maximum
		- Images of stamps were undertaken with Exposure Time=250ms; Contrast=10; Gamma=130
		- Images of plates were undertaken with Exposure Time=15.63ms; Contrast=30; Gamma=140
		- Scale (10 mm) was recalibrated before record of each set of sampels

2.3.3)	ImageJ Workflow:
		- ROI was adjusted matching the visible scale on the microscopic images using "makeOval" macro for each set of samples:
			makeOval(500, 180, [pixel count from scale on original image], [pixel count from scale on original image])
		- ROI was positioned manually to match the sample
		- stamp or plate macro was run:
			run("8-bit");
    			setBackgroundColor(255, 255, 255);
    			run("Clear Outside");
    			setThreshold(0, [140 for plate/ 113 for stamp]);
			run("Analyze Particles...", "summarize");
		- macros were exteded to save generaeted summary files in desired save dir
		- summary .xls files were used to generate data for fracture area analysis as in section 1.1)

3)	Additional notes:
		- Several data sets were re-used in different "Figures":
			-- "Dwell Time 24.5 h Test" equals "Dwell Pressure 0.34 Mps Test"
			-- "Dwell Time 20.0 h Test" equals "Force Ramp Rate 5.0 Nps Test" equals "Method Validation Batch 4 Test"