High Resolution Morphology and Electrical Characterization of Aged Li-Ion Battery Cathode
Published:Journal of Colloid and Interface Science, Received 3 April 2012. Accepted 11 May 2012. Available online 21 May 2012, http://dx.doi.org/10.1016/j.jcis.2012.05.026 by Sanjay Ramdon and Bharat Bhushan.
Abstract:Understanding the changes that take place in an aged Lithium-ion (Li-ion) battery cathode is vital to improving battery storage capabilities. High resolution imaging using an atomic force microscope (AFM) and current measurement capabilities are used to determine the difference in surface morphology as well as conductance between unaged and aged cathode. Upon aging, agglomeration of LiFePO4 particles with nanocrystalline deposits is observed and the samples show lower conductance and hence increased resistance. The data identifies potential degradation mechanisms which reduce the conductivity of the cathode leading to poor cycling performance of the battery.
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