苯酐改性聚氨酯基固态电解质的制备与性能

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2、 n - j i e * ,X UGe - w e n ,H U A N GY i - p i n g ,C H E N GQ i n .( S c h o o lo fC h e m i s t r ya n dC h e m i c alEngineering, Anhui University, Key Labortory of Envirnment-friendly PolymerMaterials of Anhui Province, Anhui Province Engineering Technology Research Center ofWater-Borne Polymer

3、 Materials, Hefei 230601)Abstract:A series of thermoplastic polyurethane with isophorone diisocyanate (IPDI),poly-terephthalic acid-3-methyl-1,5-amyl glycol ester diol (TPA-1000), polyethyleneglycol(PEG-2000)anddiethyleneglycol(DEG)aresynthesized.Polyethyleneglycol-based polyurethane with the modifi

4、cation of terephthalic anhydride for solidpolymer electrolytes(SPE) are prepared by adding 20wt% lithium salts to the as-preparedpolyurethanes, the influence of the amount of TPA-1000 on the properties of SPE wasdiscussed. The properties of SPE were characterized by FTIR, DSC, TGA and so on. Theresu

5、lts show that the heat resistance increase with the decrease of TPA-1000 content.The glass transition temperature decrease with the decrease of TPA-1000 content. TherelationshipbetweentheionicconductivityoftheSPEandt e m p e r a t u r ei sc o n s i s t e n tw i t hth eA r r h e n i u se q u a t i o

6、n .T h ee l e c tr o c h e m i c a lw i n d o w so ft h eS P Er ea c h4 . 0 Va t8 0 !.T h ec o m p r e h e n s iv ep r o p e r t i e so fe l e c t r o l y t ei st h eb e s tw h e nT P A - 1 0 0 0a n dP E G - 20 0 0h a v eam a s sr a t i oo f1 : 2 ( S P E4 ) .T h em e c h a n i c a ls t r e n g t ho

7、fSPE4 is 1.87 MPa, with the conductivity of 2.15?0-4 S/cm and the electrochemical windowof 4.3V. The discharge capacity of solid state battery assembled with SPE4 is 150 mAh/gat 0.2 C under 80 癈.Keywords:thermoplasticpolyurethane;solidpolymerelectrolytes;polyethyleneglycol;ionic conductivity, NO媅g 酧

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