物理化学学报
物理化學學報
물이화학학보
ACTA PHYSICO-CHIMICA SINICA
2013年
3期
525-532
,共8页
王海%徐雪青%史继富*%徐刚*
王海%徐雪青%史繼富*%徐剛*
왕해%서설청%사계부*%서강*
离子液体%粘度%电解质%电导率%染料敏化太阳能电池
離子液體%粘度%電解質%電導率%染料敏化太暘能電池
리자액체%점도%전해질%전도솔%염료민화태양능전지
Ionic liquid%Viscosity%Electrolyte%Conductivity%Dye-sensitized solar cel
提出了利用p-π共轭效应设计离子液体的方法, p-π共轭效应可以有效分散阴离子的负电荷,降低离子液体中阴阳离子之间的库仑引力,以得到低粘度的离子液体.所设计的离子液体为1-乙基-3-甲基咪唑苯甲酸(EMIB)和1-乙基-3-甲基咪唑异烟酸(EMIIN)(它们的阴离子中羧酸根和芳环为p-π共轭结构),这两种离子液体都达到了较低的粘度(EMIB为42 mPa·s, EMIIN为27 mPa·s).进一步将这两种离子液体做成电解质,应用在染料敏化太阳能电池中,通过优化电解质的组成, EMIB基电解质达到了1.43 mS·cm-1的电导率和1.45×10-7 cm2·s-1的I-3的扩散系数,而EMIIN基电解质的电导率和I-3扩散系数分别为1.63 mS·cm-1和2.01×10-7 cm2·s-1,后者电导性能的提高主要和EMIIN粘度较低有关系.进一步将这两种电解质组装成电池,在300 W·m-2的光强下测得EMIB基电池和EMIIN基电池的效率分别为2.85%和4.30%.
提齣瞭利用p-π共軛效應設計離子液體的方法, p-π共軛效應可以有效分散陰離子的負電荷,降低離子液體中陰暘離子之間的庫崙引力,以得到低粘度的離子液體.所設計的離子液體為1-乙基-3-甲基咪唑苯甲痠(EMIB)和1-乙基-3-甲基咪唑異煙痠(EMIIN)(它們的陰離子中羧痠根和芳環為p-π共軛結構),這兩種離子液體都達到瞭較低的粘度(EMIB為42 mPa·s, EMIIN為27 mPa·s).進一步將這兩種離子液體做成電解質,應用在染料敏化太暘能電池中,通過優化電解質的組成, EMIB基電解質達到瞭1.43 mS·cm-1的電導率和1.45×10-7 cm2·s-1的I-3的擴散繫數,而EMIIN基電解質的電導率和I-3擴散繫數分彆為1.63 mS·cm-1和2.01×10-7 cm2·s-1,後者電導性能的提高主要和EMIIN粘度較低有關繫.進一步將這兩種電解質組裝成電池,在300 W·m-2的光彊下測得EMIB基電池和EMIIN基電池的效率分彆為2.85%和4.30%.
제출료이용p-π공액효응설계리자액체적방법, p-π공액효응가이유효분산음리자적부전하,강저리자액체중음양리자지간적고륜인력,이득도저점도적리자액체.소설계적리자액체위1-을기-3-갑기미서분갑산(EMIB)화1-을기-3-갑기미서이연산(EMIIN)(타문적음리자중최산근화방배위p-π공액결구),저량충리자액체도체도료교저적점도(EMIB위42 mPa·s, EMIIN위27 mPa·s).진일보장저량충리자액체주성전해질,응용재염료민화태양능전지중,통과우화전해질적조성, EMIB기전해질체도료1.43 mS·cm-1적전도솔화1.45×10-7 cm2·s-1적I-3적확산계수,이EMIIN기전해질적전도솔화I-3확산계수분별위1.63 mS·cm-1화2.01×10-7 cm2·s-1,후자전도성능적제고주요화EMIIN점도교저유관계.진일보장저량충전해질조장성전지,재300 W·m-2적광강하측득EMIB기전지화EMIIN기전지적효솔분별위2.85%화4.30%.
A method of utilizing p-π conjugation effects for obtaining low-viscosity ionic liquids is presented. p-π conjugation effectively disperses anionic charge and reduces Coulombic interactions. Ionic liquids prepared in this study were 1-ethyl-3-methylimidazolium benzoate (EMIB) and 1-ethyl-3-methylimidazolium isonicotinate (EMIIN). They have carboxyl and aromatic ring p-π conjugated anions, and achieve low viscosities of 42 and 27 mPa·s, respectively. EMIB and EMIIN were employed as electrolytes, which were used to construct dye-sensitized solar cel s (DSCs). After optimizing the composition, the ionic conductivity and tri odide ionic diffusion constant for the EMIB-based electrolyte were 1.43 mS·cm-1 and 1.45 × 10-7 cm2·s-1, respectively. For the EMIIN-based electrolyte, the ionic conductivity and tri odide ionic diffusion constant were 1.63 mS·cm-1 and 2.01×10-7 cm2·s-1, respectively. These were higher than the corresponding values for the EMIB-based electrolyte because of EMIIN?s lower viscosity. DSCs based on these two electrolytes attained satisfactory energy conversion efficiencies of 2.85%and 4.30%for EMIB and EMIIN, respectively, under an il umination intensity of 300 W·m-2.
