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In lithium-ion batteries, several electrical and physical parameters are responsible for the degradation of the electrode materials. Here the application of Kelvin probe microscopy (KPM) is demonstrated to measure the charge sustaining capability of the LiFePO 4 cathode under aged and unaged conditions. The aged sample shows lower surface potential than the unaged sample, which can be attributed...
Investigation of aging mechanisms in lithium-ion batteries is very challenging, as aging is a cascading effect of various physical and chemical processes. As the cell ages, its impedance increases, which can be attributed to the increase in the surface resistance of the anode/cathode. We demonstrate the use of scanning spreading resistance microscopy for measuring the change in the surface resistance...
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