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inspection item units Quality Control Standard typical value Testing methods & instrumentsappearance / Colored powder / visual
particle size distribution D10 um =0.5 0.54 Melvin laser particle size analyzer Mastersizer 2000
D50 um =4.0 3
D90 um =15 10
carbon content % =1.8 1.35 CS Analyzer
(HW2000)
specific surface area m2/g =18 14.26 Specific surface analyzer(3H-2000BET-A smart)
tap density equipment shock g/cm³ =0.75 0.8 tapping apparatus
(FZS4-4B)
pH / =9.8 9.36 PH meter(PB-10)
moisture content % =0.1% 0.08% Karl fischer moisture tester
Ingredients Li % ?4.2,4.6? 4.35 chemical analysis
Fe % ?34.5,36.0? 34.82
P % ?19.0,19.6? 19.28
metal ion content Ca % =0.05 AA, UV instrument
Na % =0.05
Cu ppm =50
Zn ppm =50
Ni ppm =70
Half cell test 0.1C mAh/g =155 160 LAND ark
1C mAh/g =145 148 half cell test
First discharge efficiency % =97% 98%
