源自Keggin型多金属氧酸盐和咪唑基离子液体的混合凝胶电解质，具有增强的电化学稳定性和快速的离子电导率,The Journal of Physical Chemistry C

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源自Keggin型多金属氧酸盐和咪唑基离子液体的混合凝胶电解质，具有增强的电化学稳定性和快速的离子电导率
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2015-04-01 00:00:00 , DOI: 10.1021/acs.jpcc.5b00963
Xia Tong ₁ , Venkataraman Thangadurai ₁

Affiliation

新型杂化凝胶电解质源自无机多金属氧酸盐（POM）和有机离子液体（IL）成分的协同自组装，已使用Keggin型杂多阴离子如{PMo ₁₁ VO ₄₀ } ^4–和{PW ₁₁ MoO ₄₀ } ^3-和离子液体N-甲基咪唑-1-（3-磺酸基）丙基（MIMPS）。粉末X射线衍射研究表明，这些杂化凝胶具有层状结构并表现出特征性的热致液晶行为。对于[MIMPS] ₄ PMo _11，在环境传导下于93°C时观察到的离子电导率（σ）约为0.1 S cm ^–1VO ₄₀（IL-PMo ₁₁ V）和[MIMPS] ₃ PW ₁₁ MoO ₄₀（IL-PW ₁₁ Mo）杂化凝胶。IL-PMo ₁₁ V和IL-PW ₁₁ Mo的电化学稳定性窗口（ESW）在室温下分别约为2 V和4V。与其他已知的基于IL的电解质相比，基于POM的IL凝胶电解质表现出超离子电导率和较高的ESW，包括1-十二烷基-3-甲基咪唑鎓-双（五氟-乙基Solfonyl）酰亚胺（σ= 0.003 S cm ^–1在94° C，ESW = 3.5 V），1-十二碳杂咪唑双（五氟-乙基Solfonyl）酰亚胺（σ= 0.002 S cm ^–1在94°C，ESW = 3 V），SiO ₂/ 1-甲基-3-丙基/二（三氟甲磺酰）亚胺（σ= 0.014小号厘米^-1在85℃下，ESW = 1.5V），和1-乙基-3-甲基咪唑鎓四氰基硼酸盐/聚（偏二fluride-共-六氟丙烯（在90°C下，σ= 0.027 S cm ^–1，ESW = 3.8 V）。

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Hybrid Gel Electrolytes Derived from Keggin-Type Polyoxometalates and Imidazolium-Based Ionic Liquid with Enhanced Electrochemical Stability and Fast Ionic Conductivity

New hybrid gel electrolytes, derived from synergetic self-assembling of inorganic polyoxometalates (POMs) and organic ionic liquid (IL) components, have been successfully prepared using Keggin-type heteropolyanions such as {PMo₁₁VO₄₀}^4– and {PW₁₁MoO₄₀}^3– and ionic liquid N-methyl imidazolium-1-(3-sulfonic group) propyl (MIMPS). Powder X-ray diffraction study reveals that these hybrid gels possess lamellar structure and exhibit characteristic thermo-tropic liquid-crystalline behavior. Ionic conductivity (σ) of ∼0.1 S cm^–1 under ambient conduction was observed at 93 °C for [MIMPS]₄PMo₁₁VO₄₀ (IL-PMo₁₁V) and [MIMPS]₃PW₁₁MoO₄₀ (IL-PW₁₁Mo) hybrid gels. The electrochemical stability window (ESW) of IL-PMo₁₁V and IL-PW₁₁Mo seem to be about 2 and 4 V, respectively, at room temperature. The POM-based IL gel electrolytes show super ionic conductivity and high ESW compared to other known IL-based electrolytes, including 1-dodecyl-3-methylimidazolium-bis(pentafluoro-ethylsolfonyl)imide (σ = 0.003 S cm^–1 at 94 °C, ESW = 3.5 V), 1-dodecylimidazolium-bis(pentafluoro-ethylsolfonyl)imide (σ = 0.002 S cm^–1 at 94 °C, ESW = 3 V), SiO₂/1-methy-3-propylpiperidinium/bis(trifluoro methanesulphonyl)imide (σ = 0.014 S cm^–1 at 85 °C, ESW = 1.5 V), and 1-ethyl-3-methylimidazolium tetracyanoborate/poly(vinylidene fluride-co-hexafluoropropylene (σ = 0.027 S cm^–1 at 90 °C, ESW = 3.8 V).

更新日期：2015-04-01

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