• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Electrochemical Science >Di-Ureasil Hybrids Doped with LiBF4: Attractive Candidates as Electrolytes for 'Smart Windows'
【24h】

Di-Ureasil Hybrids Doped with LiBF4: Attractive Candidates as Electrolytes for 'Smart Windows'

机译：掺LiBF 4 的Di-Ureasil杂化材料：有吸引力的候选对象作为“智能Windows”的电解质

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The sol-gel process has been used to prepare hybrid electrolytes composed of a poly(oxyethylene)(POE)/siloxane hybrid network doped with lithium tetrafluoroborate (LiBF4) with compositions of nbetween and 2.5. In this context the lithium salt concentration has been expressed in terms of the+ number of oxyethylene units in the organic component of the network per Li ion. Electrolyte sampleswith n 20 are thermally stable up to approximately 250 C. All the materials synthesized are semi- crystalline: in the composition range n 15 free crystalline POE exists and at 60 n 2.5 evidence ofthe presence of a crystalline POE/LiBF4 compound has been found. At n = 2.5 the latter crystallinephase coexists with free salt. The room temperature conductivity maximum of this electrolyte system-5 -1 is located at n = 10 (1.5x10 S cm at 22 C). The electrochemical stability domain of the sample with+ n = 15 spans about 5.5 V versus Li/Li . This new series of materials represents a promising alternativeto the LiTFSI- and LiClO4-doped POE and POE/siloxane analogues. Preliminary tests performed witha prototype electrochromic device (ECD) comprising the sample with n = 8 as electrolyte and WO3 ascathodically coloring layer are extremely encouraging. The device exhibits switching time around 50 s,an optical density change of 0.13, open circuit memory of about 4 months and high coloration2 -1 rd efficiency (106 cm C in the 3 cycle).
机译：溶胶-凝胶法已被用于制备由掺杂有四氟硼酸锂（LiBF4）的聚（氧乙烯）（POE）/硅氧烷杂化网络组成的杂化电解质，其组成在2.5至2.5之间。在本文中，锂盐浓度已经以每个锂离子在网络的有机成分中的氧化乙烯单元的数量+表示。 n 20的电解质样品在高达约250°C的温度下具有热稳定性。所有合成的材料均为半结晶：组成范围为n 15，存在游离的结晶POE，在60 n时存在2.5的证据表明存在结晶POE / LiBF4化合物。在n ＝ 2.5时，后者的结晶相与游离盐共存。该电解质系统-5 -1的室温最大电导率位于n = 10（在22 C下为1.5x10 S cm）。 + n = 15的样品的电化学稳定性域相对于Li / Li跨度约为5.5V。这一系列新材料代表了LiTFSI和LiClO4掺杂的POE和POE /硅氧烷类似物的有希望的替代品。用原型电致变色器件（ECD）进行的初步测试非常令人鼓舞，该器件包括n = 8的样品作为电解质和WO3的偶发性着色层。该器件的开关时间约为50 s，光密度变化为0.13，开路记忆约为4个月，并且显色性高-1 rd效率（3个周期为106 cm C）。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号