| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a negative electrode active material which achieves a larger charge/discharge capacity in an electrochemical cell, and to provide a manufacturing method thereof. <P>SOLUTION: In a diffraction spectrum measured by powder X-ray diffraction, the negative electrode active material is an inorganic layer substance containing a transition element, the diffraction angle 2θ of which has a diffraction peak in a range of 8.92±0.15°. The negative electrode active material is obtained by pulverizing an inorganic layer substance containing a transition element, and then calcining the powder thus produced at a temperature of 100-600°C. As the inorganic layer substance containing the transition element, a layer silicate mineral belonging to a vermiculite group containing the transition element is especially preferable. As the transition element, iron(Fe) is especially preferable. <P>COPYRIGHT: (C)2013,JPO&INPIT |
