SiO powder for secondary battery and process for producing the same
A secondary battery and manufacturing method technology, applied in the direction of secondary battery, electrode manufacturing, battery electrodes, etc., can solve the problems of unable to alleviate the volume expansion of lithium ions, unable to ensure the maintenance of discharge capacity, etc., to achieve miniaturization or low Reduce costs, achieve leapfrog performance, and reduce electricity bills
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[0050] Hereinafter, the effect exhibited when the hydrogen-containing SiO powder of the present invention is used as a negative electrode material of a lithium secondary battery will be described based on specific inventive examples and comparative examples.
[0051] The coin-shaped lithium secondary battery shown in FIG. 1 was used for the evaluation tests of the inventive example and the comparative example. As the negative electrode material of the inventive example, four kinds of SiO powders with the hydrogen concentration of about 80 ppm, 100 ppm, 200 ppm and 300 ppm were used, and as the negative electrode material of the comparative example, SiO powders with the hydrogen concentration of about 30 ppm, 40 ppm and 50 ppm were used. 3 types of SiO powder.
[0052] In order to evaluate the characteristics of the lithium secondary battery, the aforementioned coin-shaped lithium secondary battery was manufactured, and the discharge capacity and cycle capacity retention rate w...
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