Study of the lithium solid electrolytes based on lithium nitride chloride (Li9N2Cl3)

✍ Scribed by Yongzhong Jia; Jinxian Yang

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 361 KB
• Volume: 96
• Category: Article
• ISSN: 0167-2738
• DOI: 10.1016/s0167-2738(96)00567-x

✦ Synopsis

Lithium nitride chloride (Li,N,Cl,) is a fast solid lithium ion conductor. According to analytical data from X-ray diffraction, DSC, DTA and conductivities, we found that a phase transition could take place when Li,N,Cl, is at 250°C. Lithium solid electrolytes of Li,_,M,N,Cl, (M = Na', K', Rb+, Cs') were prepared. The ionic conductivities of the prepared samples were determined, from room temperature to 350°C using a PAR368-1 AC-impedance spectrometer, with frequency measurements varying from 4 Hz to 100 kHz. The experimental results showed that the ionic conductivities could be of the order of lo-'S cm-' at 350°C with low electronic conduction and a high thermodynamic decomposition voltage at room temperature. The conductivity of Li,_xM,N,Cl, depends on the ionic radius of Na', K', Rb+ and Cs' ions substituted for the Li+ ion. We studied the atomic transport process of lithium ion conductors of Li9_xMxN,Cl, using X-ray diffraction and differential thermal analysis.