This technology utilizes low-polarization reference electrodes, such as LTO or LFP, to enhance potential measurement accuracy. By incorporating a fourth electrode made of lithium metal in a cross-shaped four-electrode configuration, it enables in-situ pre-lithiation of the reference electrode within the system without the need for cell disassembly.
Conventional three-electrode systems suffer from reduced measurement accuracy due to the use of lithium metal, which has a high polarization rate, as the reference electrode. Utilizing more accurate LTO or LFP reference electrodes typically requires separate external pre-lithiation followed by cell reassembly, which is cumbersome and time-consuming.
This technology features a cross-shaped arrangement on the four sides of an external housing, with two measurement electrodes and two reference electrodes facing each other. By bringing the low-polarization first reference electrode into close contact with the lithium metal second reference electrode, pre-lithiation is performed using a charge/discharge device before switching to the measurement electrodes for potential monitoring. This approach is ideal for battery material research, including potential analysis by electrode, diagnosis of performance variations between cells, and isolated evaluation of cathode and anode degradation. It allows for reliable tracking of individual cathode and anode potentials without the contamination or variability introduced during reassembly.
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