Effect of P 2O 5 in Li 2O–P 2O 5–B 2O 3 electrolyte fabricated by aerosol flame deposition

• Published in: Journal of power sources Vol. 183; no. 1; pp. 431 - 435
• Main Authors: Cho, Kihyun, Oh, Jangwon, Lee, Taewon, Shin, Dongwook
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 2008
• Subjects: Aerosol flame deposition; Glass electrolyte; Li 2O–B 2O 3–P 2O 5; Solid electrolyte; Thin film battery; Glass electrolyte; Solid electrolyte; Aerosol flame deposition; Thin film battery; Li 2O–B 2O 3–P 2O 5
• ISSN: 0378-7753; 1873-2755
• DOI: 10.1016/j.jpowsour.2008.05.029

Amorphous Li 2O–B 2O 3–P 2O 5 films were fabricated using “aerosol flame deposition (AFD)” method for the thin film battery application. The liquid or gas type precursor sources such as Li precursor solutions, BCl 3 and POCl 3 were used to fabricate the electrolyte films. In this work, we studied the effect of P 2O 5 in a LiO 2–P 2O 5–B 2O 3 system formed at various flow rates of POCl 3. XRD analysis revealed that the crystalline phase of H 3BO 3 as well as other oxides was formed in glass soot. As the flow rate of POCl 3 increased, the glass soot gradually changed to amorphous phase. The ionic conductivity of the soot was measured and the FT-IR and Raman spectroscopy were used to correlate the measured conductivity to the glass network structure in the deposited soot film. The maximum conductivity of electrolyte prepared at conditions of 20 sccm flow rate of BCl 3 and 80 sccm flow rate of POCl 3 was 2 × 10 −6 at room temperature. As P 2O 5 contents increased, the conductivity of glass electrolyte increased due to the increase of P O structural unit associated with non-bridging oxygens (NBO).