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Li–B–O–N electrolytes for all-solid-state thin film batteries

✍ Scribed by J.M. Kim; G.B. Park; K.C. Lee; H.Y. Park; S.C. Nam; S.W. Song

Publisher
Elsevier Science
Year
2009
Tongue
English
Weight
1024 KB
Volume
189
Category
Article
ISSN
0378-7753

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✦ Synopsis

We report for the first time new Li + ion conducting thin film solid electrolytes based on Li-B-O-N system. Substitution of oxygen in xLi 2 O-B 2 O 3 (x = 1, 3, 5) by nitrogen was successfully achieved by reactive sputtering under nitrogen plasma. FTIR and XPS analyses indicated that N atom was incorporated in the Li-B-O matrix film, and an increase in the composition of Li 2 O together with N-substitution caused the structural conversion from ring-type borate to open structured one, where more free space and ionic bonding characteristic are offered for higher mobility of Li + ions. A high ionic conductivity of ca. 2.3 × 10 -6 S cm -1 at room temperature was obtained from the thin film electrolyte of Li 3.09 BO 2.53 N 0.52 glass that was prepared using 3Li 2 O-B 2 O 3 target. Electrochemical analyses suggest the high Li + ion conductivity is induced by the reduced activation energy through the control of the composition and the structure.

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