电解质
剥离(纤维)
电镀(地质)
阴极
阳极
电化学
法拉第效率
化学
无机化学
化学工程
介电谱
分解
材料科学
物理化学
电极
有机化学
地质学
复合材料
工程类
地球物理学
作者
Noel J. Leon,Xiaowei Xie,Manshu Yang,Darren M. Driscoll,Justin G. Connell,Sang-Hyeon Kim,Trevor J. Seguin,John T. Vaughey,Mahalingam Balasubramanian,Kristin A. Persson,Chen Liao
标识
DOI:10.1021/acs.jpcc.2c03272
摘要
Multivalent ion chemistries, like Ca2+, used in energy storage boast the potential to utilize solid metallic anodes and provide high volumetric energy density. The promise of such systems relies on the ability to incorporate high-voltage cathode materials while sustaining robust plating and stripping at the anode. These processes are dependent on an electrochemically stable electrolyte for ion transport and storage. Here, we report an addition to the limited pool of nonaqueous electrolytes capable of plating and stripping calcium at room temperature. The synthesis and structural properties of calcium tetrakis(perfluoro-tert-butoxy) aluminate (Ca[TPFA]2) are described along with the electrochemical performance during plating and stripping (up to 55% Coulombic efficiency) and a proof of concept for full cell viability with a CuS cathode material. X-ray absorption spectroscopy (XAS) and density functional theory (DFT) experiments were used to study both the bulk solvation structure around calcium and possible decomposition pathways of the weakly coordinating TPFA anion.
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