两种离子液体(离子液体),其官能化双(草酸)硼酸(BOB)和二FL氟(草酸)硼酸(DFOB)作为阴离子,已被合成和作为添加剂用于电池级电解质的1M的LiPF施加6在等体积的EC-DEC-DMC(LP71)混合物。当将0.3 M IL添加到LP71时,在循环伏安法期间,对于阴极侧和阳极侧均观察到归因于固体电解质界面(SEI)形成的峰。阳极扫描过程中峰的存在表明IL具有在阴极表面形成SEI的能力。高压锂| 使用集成电解质的LiNi 0.5 Mn 1.5 O 4(LNMO)电池表现出约120 mAh g -1的放电容量。发现含有0.3 M BOB-IL和DFOB-IL的溶液在100个循环后的放电容量保留率分别为99.2%和98.1%。通过恒电流循环期间的阻抗分析,当使用BOB-IL作为添加剂时,证实了SEI的生长。在这种情况下,在循环的LNMO电极的红外光谱中,观察到与硼酸盐化合物和聚碳酸酯有关
由N-烷基(烷基醚)-N-甲基吡咯烷鎓,-恶唑烷鎓,-哌啶鎓或-吗啉鎓阳离子(烷基= nC4H9,烷基醚= CH3OCH2,CH3OCH2CH2)和全氟烷基三氟硼酸根阴离子([R(合成并表征R(F)= CF 3,C 2 F 5,nC 3 F 7,nC 4 F 9)。这些盐大多数在室温下为液体。测量了这些盐的关键特性-相变,热稳定性,密度,粘度,电导率和电化学窗口-并将其与相应的[BF4]-和[(CF3SO2)2N]-盐进行比较。就阳离子和阴离子的身份,阳离子侧链的变化(即烷基对烷基醚),以及[R(F)BF3]-离子中全氟烷基(R(F))长度的变化。在纯的N-丁基-N-甲基吡咯烷鎓五氟乙基三氟硼酸酯作为支持电解质中,发生Li +离子的还原和锂金属的再氧化。这样的全面研究增强了为许多应用(包括电解质)设计和优化离子液体所必需的知识。这些新盐中的某些显示出所需的特性,包括低熔点,高热稳定性,低粘
Cyclic Quaternary Ammonium Ionic Liquids with Perfluoroalkyltrifluoroborates: Synthesis, Characterization, and Properties
作者:Zhi-Bin Zhou、Hajime Matsumoto、Kuniaki Tatsumi
DOI:10.1002/chem.200500930
日期:2006.3.1
and compared to those of their corresponding [BF4]- and [(CF3SO2)2N]-salts. The structural effect on all the above properties was intensively studied in terms of the identity of the cation and anion, variation of the side chain in the cation (i.e., alkyl versus alkyl ether), and change in the length of the perfluoroalkyl group (R(F)) in the [R(F)BF3]- ion. The reduction of Li+ ions and reoxidation of
由N-烷基(烷基醚)-N-甲基吡咯烷鎓,-恶唑烷鎓,-哌啶鎓或-吗啉鎓阳离子(烷基= nC4H9,烷基醚= CH3OCH2,CH3OCH2CH2)和全氟烷基三氟硼酸根阴离子([R(合成并表征R(F)= CF 3,C 2 F 5,nC 3 F 7,nC 4 F 9)。这些盐大多数在室温下为液体。测量了这些盐的关键特性-相变,热稳定性,密度,粘度,电导率和电化学窗口-并将其与相应的[BF4]-和[(CF3SO2)2N]-盐进行比较。就阳离子和阴离子的身份,阳离子侧链的变化(即烷基对烷基醚),以及[R(F)BF3]-离子中全氟烷基(R(F))长度的变化。在纯的N-丁基-N-甲基吡咯烷鎓五氟乙基三氟硼酸酯作为支持电解质中,发生Li +离子的还原和锂金属的再氧化。这样的全面研究增强了为许多应用(包括电解质)设计和优化离子液体所必需的知识。这些新盐中的某些显示出所需的特性,包括低熔点,高热稳定性,低粘
IONIC LIQUID, METHOD FOR PRODUCING SAME, DOUBLE LAYER CAPACITOR COMPRISING SAME, AND LITHIUM BATTERY
申请人:National Institute of Advanced Industrial Science
and Technology
公开号:EP1698631B1
公开(公告)日:2011-08-10
Ionic liquid, method for producing same, double layer capacitor comprising same, and lithium battery
申请人:Matsumoto Hajime
公开号:US20070099079A1
公开(公告)日:2007-05-03
The present invention relates to ionic liquids comprising at least one organic ammonium ion and at least one member selected from the group consisting of anions represented by [BF
3
(C
n
F
2n+1
)]
−
wherein n represents 2, 3 or 4.
Bis(oxalato)borate and difluoro(oxalato)borate-based ionic liquids as electrolyte additives to improve the capacity retention in high voltage lithium batteries
Two ionic liquids (ILs), which are functionalized with bis(oxalato)borate (BOB) and difluoro(oxalato)borate (DFOB) as the anion, have been synthesized and applied as additives for the battery grade electrolyte 1 M LiPF6 in an equivolume mixture of EC-DEC-DMC (LP71). When 0.3 M IL was added to LP71, peaks attributed to the formation of solid electrolyte interface (SEI) were observed during cyclic voltammetry
两种离子液体(离子液体),其官能化双(草酸)硼酸(BOB)和二FL氟(草酸)硼酸(DFOB)作为阴离子,已被合成和作为添加剂用于电池级电解质的1M的LiPF施加6在等体积的EC-DEC-DMC(LP71)混合物。当将0.3 M IL添加到LP71时,在循环伏安法期间,对于阴极侧和阳极侧均观察到归因于固体电解质界面(SEI)形成的峰。阳极扫描过程中峰的存在表明IL具有在阴极表面形成SEI的能力。高压锂| 使用集成电解质的LiNi 0.5 Mn 1.5 O 4(LNMO)电池表现出约120 mAh g -1的放电容量。发现含有0.3 M BOB-IL和DFOB-IL的溶液在100个循环后的放电容量保留率分别为99.2%和98.1%。通过恒电流循环期间的阻抗分析,当使用BOB-IL作为添加剂时,证实了SEI的生长。在这种情况下,在循环的LNMO电极的红外光谱中,观察到与硼酸盐化合物和聚碳酸酯有关
Ionic liquids for electrochemical applications: Correlation between molecular structure and electrochemical stability window
guidelines were determined from the experimental results: first, the cations influence both cathodic and anodic limits; second, the asymmetric ammoniumcations show larger electrochemical stability than symmetric ones; third, the electrochemical stability decreases at the increase of the length of the ''long chain''; fourth, alkyl long chains show a larger anodic limit, but smaller cathodic limit than
离子门控已成为一种有效且通用的工具,可调节材料的电荷载流子密度并控制其电子基态,以及开发低温器件,如电化学晶体管。离子液体因其在基础研究和应用研究中的高热稳定性和电化学稳定性而成为一种很有前途的门控剂。然而,对离子液体的分子结构与其电化学稳定性之间的相关性的理解相当有限。出于这个原因,本研究旨在确定合成适合在低温下用作电解质的离子液体的指南。一系列二十三种具有各种铵阳离子的离子液体,由三个“短链”和一个“长链”组成,N作为阴离子,被合成。之后,确定它们的热行为以识别那些表现出T g的离子液体 < -50 °C。所选离子液体的阳极和阴极极限是通过线性扫描伏安法使用电化学晶体管配置测量的,工作温度为-33°C。测量了绝对值从 2.9 到 5.7 V 的电化学窗口。总体而言,根据实验结果确定了五个指导原则:首先,阳离子影响阴极和阳极极限;其次,不对称铵阳离子比对称铵阳离子表现出更大的电化学稳定性