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yexuqing

木虫之王 (文学泰斗)

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[交流] γ-丁内酯電解液對鋰電池電性及熱安定性之研究

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?????????????????????????????O?c??O????о??l??????????????????????s?c????????????????^LiCoO2?????????Spinel???LiMn2O4????Olivine???LiFePO4???????O??????Ч??????????????????s??????????????????????????LiFePO4?@?N?^????????O?????u??????????S?????????r?????????h?????????·??????????????????????????????????????LiCx???????????N????????x?????s???????????????????????y??????DEC???c??31?棩?????и??x??c????t???????O????????????????P?I?????
???@Щ????????????????t????íh???????????EC??PC??GBL???c???????^?????}????LiPF6???????g?????????107???????????????????EC/DMC?а??????s???80?棩??EC??????????w????PC??????Y????????exfoliation????GBL???y????????Tm = -43 ?棻Tb = 204 ?棻Tf = 97 ?棩??????????????1.73 cP at 25?棩?????^????x???????????^????????????=39??????}??????LiBOB?cLiTFSI???^?????GBL?У????????_???????????????īI?@???????GBL?????y??????????????^????????????GBL???????????????????????????Ч????????EC??????????a??F????????????g???}??LiTFSI?????h????????????X???????????
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1. ????
?????EC ?? PC ?? GBL ?? VC ?c??}(LiBF4) (Ferro, Battery Grade)??EC/EMC??1M LiPF6 with 2-wt% VC (Ferro)?? LithiumBis-oxolatoborate (LiBOB) (Chemetall, Premium Battery Grade, Purity 99.99%)??????????????????????к?????0.5 wt%??????O(Negative Electrode; NE)?? ???MCMB 1028 ??SWF 15P10 ?cHard Carbon P(J) ?? ????????PVDF ??Acrylic Binder(SWF)???T???14 ??m ?~????????O(Positive Electrode; PE)?? ???Li(Ni0.8Co0.15Al0.05)O2(LNCA)?? ????????PVDF ???T???20??m ???X????????x??????DSM (PE)??Celgard 2400(PP)??Celgard 2500 (PP)??Asahi C316 (PE)??
2. ????u??
?????M????????????y??d????o???????(CR2032)???????X????????c?A???18650 ??????????нM?ɡ??o????????????M????h????(Cyclic Voltammetry; CV)?c?????迹(AC Impedance)?y????????X???????(SWF/DSM/LNCA)?t???????????O???y??c????y??????????375 mAh?????A???18650??????O?c???x??c?????X???????????????????900 mAh ???o???PTC ??
??????????M??????

3. ???W?y??c??????y?
???????????? WTW/Cond 330i/SET (Germany)?y???AC-IR ?t????Solartron1255B (Frequency Response Analyzer)??SI1287(Electrochemical Interface)???y???y???l???????1 MHz ??0.1 Hz ?????y??????10 mV ?????yCV ?t???MacPile II Cycler ?c????????0.05 mV/s ???????????????y??t?????Bitrode ??y??C???????DSC ??????????Perkin Elmer ?????僽????P??????y??P???ARC (Thermal Hazard Technology; UK)?y?????????????????2.5g ?????M????????????????????????????u???????????e???y??l??????50??C ????350??C ?????????5??C ??????????2??C/min ?????ü????????ь???(Heat-Wait-Seek)??y??y?????О飬????y??l????????0.02??C/min ?r???M????????
?Y???c??
1. GBL ??????????
????????DSC ?cARC ?y?GBL ??????????????????????????????1.EC:GBL (1:1)?? 1.5M LiBF4?????±????GBL1????2.EC:EMC (1:2)?? 1M LiPF6 ?????±????EMC???鱾?????????????DSC ?Y????D??? EMC ??????s??270??C ?? ?_????s??225??C?????????H=184 J/g??????245??C ?r???F?С??????壬?c?īI??????????}??(LiPF6)?cEMC?????????GBL1 ???_???????????t??290??C ???????????????F??340??C?? ???????H=375 J/g?? ????δ?l?F?}??(LiBF4)??????????????????200??C ??????壬?Д?????LiBF4????????

?D???????DSC?D?V(a) EC/EMC (1:2)??1M LiPF6??(b) EC/GBL (1:1)??1.5M LiBF4???????????10??/min
GBL ?????Heat-Wait-Seek ???м??216??C ?r??????l??(Self-heating)??F???K???m?傀С?r???y??r?g1500~1800 ??犕r???????g???????????5~27 bars???D????Curve d???????????_350??C ?r???????_???100 bar ???y????????u????????K?o?κΓp?????????}?????Y????????D???c?D????Y?????????Log dT/dt??T ???P?S?D????D?п??????ARC ?y????N??????l????????????D???@??? GBL ?????y????g????l???????????^1.2 ??C/min ??????300??C ??????^?????????????????Y????350??C ??????????EMC ?????y????????l??壨?D?? Curve a????????_??165??C ????l????????_1.2??C/min ????????_??250??C ????l????????^10C/min ?????u?????????r?p???

?D????ARC?y??Y????a ??????c??????vs. ?r?g??EC/EMC??1M LiPF6????b??????d??????vs.?r?g??EC/PC/GBL??1.4M LiBF4

?D?塢ARC?y?????l????????????P?S?D(a)EC:EMC??1MLiPF6??(b) ECC:GBL??1.4MLiBF4
2. ???W????
??????????(ARC ??DSC)?@?GBL??????^???????????????п?????GBL ????????и????????h???????????????DMC ??EMC ??DEC??????????????HEV ???????^???????????????????????^????m????????????x???????????????O?????^???????????????????????\????????/ ?????a?????r???????????y?????^?L???????(Cycle/Calendar Life)??l??????GBL ??????????y??????????????????????GBL ???????????m???????????K????m????????/ ??/ ??????K???????O??????????_???????????????????c??
(1)???????
(2)?????????c???x????
(3)??h?????y?-??O
(4) ??h?y???Hard Carbon ??O??SEM????
(5) ?????迹?????????O????
??????Y????B?Y??????????
??Y????f??EC : GBL(LiBF4)??EC : EMC(LiPF6) ??N?????y??DSC ?cARC ????y?????????ARC ?Y???@?GBL ?????y????S????????350??C ?y??Y???????^EC:EMC ??????^????????????W?y??????????O????(MCMB, SWF, HardCarbon)???????N?????y???y????@?GBL ?cEMC ?????????????h?????????O???y??Y??????l?F?? GBL????????EMC ??????^??????F?????O?迹GBL ??????@?^EMC ???С????h?y???GBL ????????O??迹?????????^EMC ???С???????^??y?????@?GBL ??????^??????????
????-??????????????????????????о????d?????g?mail??[/url][url=mailto:materialsnet@itri.org.tw]materialsnet@itri.org.tw
?????Dmitry Belov???~???????x??? / ??????????
????????????I?????s?I260??????????Y??????http://www.materialsnet.com.tw/DocView.aspx?id=7099

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