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Novel surface modification approach for graphite anode of lithium ion batteries was developed in this study. Poly(acrylonitrile) was in situ encapsulated on the surface of natural graphite (N-graphite) particles via radiation-initiated polymerization. The graphite obtained shows a large improvement in electrochemical performance such as initial Coulombic efficiency and cycleability compared with the...
A new method for measuring self-discharge of lithium-ion graphite anodes is reported. First, the anode lithium content is calculated from the open-circuit potential as a function of open-circuit time (OCP versus OCT) using equilibrium potential-composition isotherms. Then, the self-discharge rate is obtained from the differential of lithium content with respect to time on open circuit. The self-discharge...
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