[14p-P2-1~10] 9.5 New functional materials and new phenomena

[14p-P2-1] Synthesis and optical property of Li₂CN₂

〇Takayuki Komuro¹, Kazuo Kuriyama¹, Masato Katou¹, Kazumasa Kushida² (1.Hosei Univ., 2.Osaka Kyoiku Univ.)

Keywords:lithium ion battery

Li₂CN₂ is synthesized by direct reaction between Li₃N (99.5% purity) and carbon with molar ratio of 2: 1 at 600 °C for 6 hours in an N₂ atmosphere . The prepared sample is white and show deliquescence. The lattice constant is calculated as a = 3.72 Å and c = 8.42 Å. As a result of light absorption measurement and optical transmittance measurement, it is found that the material is a direct transition type material having a band gap of about 3.5 eV.