| Budget Amount *help |
¥17,030,000 (Direct Cost: ¥13,100,000、Indirect Cost: ¥3,930,000)
Fiscal Year 2018: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2017: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2016: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2015: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
|
|---|
| Outline of Final Research Achievements |
We have prepared B/C and B/C/N materials as the host materials by using the CVD method and graphene-like graphite (GLG) by the pyrolysis of graphite oxide. Li and Na were intercalated into the B/C materials as the anodes of Li and Na ion batteries by the electrochemical method and resulted in the reversible capacities of 600 mAh/g and 300 mAh/g, respectively. We succeeded in intercalation of Ca into B/C materials by chemical reaction of Ca vapor with the B/C materials, which is the first example of Ca intercalation into bulk of the graphite-like layered materials with the vapor phase reaction.
XANES spectra suggested that boron in B/C materials lowered the bottom of conduction bands, which explained the enhancement of intercalation of alkali metals and divalent metals into the host materials.
We conclude that the B/C materials and the GLG are useful host materials for the intercalation of alkali metals and divalent metals.
|
