Evaluation of low-purity natural graphite as a costeffective anode active material for lithium ion batteries
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Low-purity natural graphite as an anode active material for lithium ion batteries was studied in order to reduce the cost oflithium ion batteries. The electrochemical performance of low-purity natural graphite was compared to that of high-puritycommercial grade graphite. No significant differences of the morphology or crystal structure were observed in the SEM, XRD,and Raman measurements. Based on the EDX and ICP-AES results, relatively larger amounts of Al and Fe than otherimpurities were found in the low-purity natural graphite powders. Although the LP18-99 sample contained various impurities,it showed good performance in comparison with the NG-R sample.
Abstract
Low-purity natural graphite as an anode active material for lithium ion batteries was studied in order to reduce the cost oflithium ion batteries. The electrochemical performance of low-purity natural graphite was compared to that of high-puritycommercial grade graphite. No significant differences of the morphology or crystal structure were observed in the SEM, XRD,and Raman measurements. Based on the EDX and ICP-AES results, relatively larger amounts of Al and Fe than otherimpurities were found in the low-purity natural graphite powders. Although the LP18-99 sample contained various impurities,it showed good performance in comparison with the NG-R sample.
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