• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Advanced Functional Materials >CuF2 as Reversible Cathode for Fluoride Ion Batteries
【24h】

CuF2 as Reversible Cathode for Fluoride Ion Batteries

机译：CuF2作为氟离子电池的可逆阴极

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In the search for novel battery systems with high energy density and low cost, fluoride ion batteries have recently emerged as a further option to store electricity with very high volumetric energy densities. Among metal fluorides, CuF2 is an intriguing candidate for cathode materials due to its high specific capacity and high theoretical conversion potential. Here, the reversibility of CuF2 as a cathode material in the fluoride ion battery system employing a high F-conducting tysonite-type La0.9Ba0.1F2.9 as an electrolyte and a metallic La as an anode is investigated. For the first time, the reversible conversion mechanism of CuF2 with the corresponding variation in fluorine content is reported on the basis of X-ray photoelectron spectroscopy measurements and cathode/electrolyte interfacial studies by transmission electron microscopy. Investigation of the anode/electrolyte interface reveals structural variation upon cycling with the formation of intermediate layers consisting of i) hexagonal LaF3 and monoclinic La2O3 phases in the pristine interface; ii) two main phases of distorted orthorhombic LaF3 and monoclinic La2O3 after discharging; and iii) a tetragonal lanthanum oxyfluoride (LaOF) phase after charging. The fading mechanism of the cell capacity upon cycling can be explained by Cu diffusion into the electrolyte and side reactions due to the formation of the LaOF compound.
机译：在寻找具有高能量密度和低成本的新型电池系统时，最近出现了氟离子电池作为存储具有很高体积能量密度的电的另一选择。在金属氟化物中，CuF2由于其高的比容量和高的理论转化率而成为阴极材料的诱人候选物。在此，研究了在以高F传导性的钛矿型La0.9Ba0.1F2.9作为电解质并以金属La作为阳极的氟离子电池系统中，作为阴极材料的CuF2的可逆性。首次在X射线光电子能谱测量和透射电子显微镜对阴极/电解质界面的研究的基础上，报道了含氟量相应变化的CuF2可逆转化机理。对阳极/电解质界面的研究揭示了在循环过程中结构的变化，形成的中间层包括：i）原始界面中的六角形LaF3和单斜La2O3相。 ii）放电后正交斜方晶LaF3和单斜La2O3的两个主要相; iii）充电后为四方形的氟化氧镧（LaOF）相。循环时电池容量的衰减机理可以通过Cu扩散到电解质中以及由于LaOF化合物的形成而发生的副反应来解释。

著录项

  • 来源
    《Advanced Functional Materials》 |2017年第31期|1701051.1-1701051.11|共11页
  • 作者

    Thieu Duc Tho; Hammad Mohammed; Bhatia Harshita; Diemant Thomas; Chakravadhanula Venkata Sai Kiran; Behm Rolf Jurgen; Kubel Christian; Fichtner Maximilian;

  • 作者单位

    KIT, Inst Nanotechnol, D-76344 Eggenstein Leopoldshafen, Germany|Helmholtz Inst Ulm Electochem Energy Storage HIU, Helmholtzstr 11, D-89081 Ulm, Germany|CIDETEC, Mat Energy Unit, Donostia San Sebastian 20014, Gipuzkoa, Spain;

    KIT, Inst Nanotechnol, D-76344 Eggenstein Leopoldshafen, Germany|TUD, Joint Res Lab Nanomat KIT & TUD, Jovanka Bontschits Str 2, D-64287 Darmstadt, Germany;

    KIT, Inst Nanotechnol, D-76344 Eggenstein Leopoldshafen, Germany|Helmholtz Inst Ulm Electochem Energy Storage HIU, Helmholtzstr 11, D-89081 Ulm, Germany;

    Ulm Univ, Inst Surface Chem & Catalysis, Albert Einstein Allee 47, D-89081 Ulm, Germany;

    KIT, Inst Nanotechnol, D-76344 Eggenstein Leopoldshafen, Germany|Helmholtz Inst Ulm Electochem Energy Storage HIU, Helmholtzstr 11, D-89081 Ulm, Germany|KIT, Karlsruhe Nano Micro Facil, D-76344 Eggenstein Leopoldshafen, Germany;

    Helmholtz Inst Ulm Electochem Energy Storage HIU, Helmholtzstr 11, D-89081 Ulm, Germany|Ulm Univ, Inst Surface Chem & Catalysis, Albert Einstein Allee 47, D-89081 Ulm, Germany;

    KIT, Inst Nanotechnol, D-76344 Eggenstein Leopoldshafen, Germany|Helmholtz Inst Ulm Electochem Energy Storage HIU, Helmholtzstr 11, D-89081 Ulm, Germany|KIT, Karlsruhe Nano Micro Facil, D-76344 Eggenstein Leopoldshafen, Germany;

    KIT, Inst Nanotechnol, D-76344 Eggenstein Leopoldshafen, Germany|Helmholtz Inst Ulm Electochem Energy Storage HIU, Helmholtzstr 11, D-89081 Ulm, Germany;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    copper fluoride CuF2; electrode/electrolyte interfaces; electron microscopy; fluoride ion conductors; solid state batteries;

    机译：氟化铜CuF2;电极/电解质界面;电子显微镜;氟化物离子导体;固态电池;

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