Synthesis and characterization of SrBi<inf>4</inf>Ti<inf>4</inf>O <inf>15</inf> ferroelectric filler based composite polymer electrolytes for lithium ion batteries
- Publication Type:
- Journal Article
- Citation:
- Polymer Bulletin, 2008, 60 (2-3), pp. 351 - 361
- Issue Date:
- 2008-03-01
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Composite polymer electrolytes (CPEs) based on poly (ethylene oxide) (PEO) (Mol.Wt ∼ 6×105) complexed with LiN(CF3SO 2)2 lithium salt and SrBi4Ti4O 15 ferroelectric ceramic filler have been prepared as films. Citrate gel technique and conventional solid state technique were employed for the synthesis of the ferroelectric fillers in order to study the effect of particle size of the filler on ionic conductivity of the polymer electrolyte. Characterization techniques such as X-ray diffraction (XRD), differential thermal analysis (DTA), scanning electron microscopy (SEM) and temperature dependant DC conductivity studies were taken for the prepared polymer composite electrolytes. The broadening of DTA endotherms on addition of ceramic fillers to the polymer salt complex indicated the reduction in crystallinity. An enhancement in conductivity was observed with the addition of SrBi 4Ti4O15 as filler to the (PEO) 8-LiN(CF3SO2)2 polymer salt complexes. Among the investigated samples (PEO)8-LiN(CF 3SO2)2 +10 wt% SrBi4Ti 4O15 (citrate gel) polymer composite exhibits a maximum conductivity. © 2007 Springer-Verlag.
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