J2111A to measure the impedance of a Li-ion cell as shown by OMICRON Lab...
Therefore, the voltage will be around 4 VDC and the impedance magnitude in the range of 0.5-2 mOhms.
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Yes, this measurement will work, but for best accuracy, you will want a differential probe for ch2.
Alternatively, the shunt through with DC blocks or the 2-port extended range shunt through will also work, and will also require a ground isolator. The advantage of the shunt through methods is better calibration capability.
Personally, we would use the 2-port measurement. You could use DC blocks, but our new probes are better, and using a 2X probe you could measure to 5V. You would also need PDN Cables, J2102B and either a pair of P2104A-2X or a P2102A-2X probe, available by 2nd quarter 2021. You might also need a B-WIT, but not sure - at 0.5 mOhm is it is likely and at 2 mOhms you would not need it.
We can help more if we know the details about the connections to the battery. You can’t use clip leads, has to be coaxial connections.
Additional references for J2111A:
https://www.picotest.com/products_J2111A.html
https://www.picotest.com/downloads/J2111A_Questions.pdf