کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1289004 | 973280 | 2010 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Lithium conducting ionic liquids based on lithium borate salts Lithium conducting ionic liquids based on lithium borate salts](/preview/png/1289004.png)
The simple reaction of trialkoxyborates with butyllithium resulted in the obtaining of new lithium borate salts: Li{[CH3(OCH2CH2)nO]3BC4H9}, containing oxyethylene substituents (EO) of n = 1, 2, 3 and 7. Salts of n ≥ 2 show properties of room temperature ionic liquid (RTIL) of low glass transition temperature, Tg of the order from −70 to −80 °C. The ionic conductivity of the salts depends on the number of EO units, the highest conductivity is shown by the salt with n = 3; in bulk its ambient temperature conductivity is 2 × 10−5 S cm−1 and in solution in cyclic propylene sulfite or EC/PC mixture, conductivity increases by an order of magnitude. Solid polymer electrolytes with borate salts over a wide concentration range, from 10 to 90 mol.% were obtained and characterized. Three types of polymeric matrices: poly(ethylene oxide) (PEO), poly(trimethylene carbonate) (PTMC) and two copolymers of acrylonitrile and butyl acrylate p(AN–BuA) were used in them as polymer matrices. It has been found that for systems of low salt concentration (10 mol.%) the best conducting properties were shown by solid polymer electrolytes with PEO, whereas for systems of high salt concentration, of the polymer-in-salt type, good results were achieved for PTMC as polymer matrix.
Journal: Journal of Power Sources - Volume 195, Issue 18, 15 September 2010, Pages 6055–6061