First results from in situ transmission electron microscopy studies of all-solid-state fluoride ion batteries

被引：12

作者：

Fawey, Mohammed Hammad ^{[1
,2
,3
]}

Chakravadhanula, Venkata Sai Kiran ^{[4
,5
]}

Munnangi, Anji Reddy ^{[4
]}

Rongeat, Carine ^{[4
]}

Hahn, Horst ^{[2
,3
,4
]}

Fichtner, Maximilian ^{[2
,4
]}

Kuebel, Christian ^{[2
,3
,4
,6
]}

机构：

[1] Sohag Univ, Fac Sci, Phys Dept, Sohag 82524, Egypt

[2] Karlsruhe Inst Technol KIT, Inst Nanotechnol INT, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany

[3] Tech Univ Darmstadt, Joint Res Lab Nanomat, Alarich Weiss Str 2, D-64287 Darmstadt, Germany

[4] Helmholtz Inst Ulm Electrochem Energy Storage HIU, Albert Einstein Allee 11, D-89081 Ulm, Germany

[5] Vikram Sarabhai Space Ctr, Thiruvananthapuram 695022, Kerala, India

[6] Karlsruhe Inst Technol, Karlsruhe Nano Micro Facil KNMF, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany

来源：

JOURNAL OF POWER SOURCES | 2020年 / 466卷

关键词：

In situ transmission electron microscopy (TEM); Focused ion beam (FIB); Fluoride ion battery; All-solid-state battery; Electrode/electrolyte interfaces; Electrochemistry; PARTICLE-SIZE; LITHIUM; ANODE; CONDUCTIVITY; PERFORMANCE; RELAXATION; ENERGY; MG;

D O I：

10.1016/j.jpowsour.2020.228283

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A focused ion beam (FIB) system is used to fabricate a micron-sized all-solid-state fluoride ion cell from a bulk battery for in situ transmission electron microscopy (TEM) testing. The bulk battery is based on a La0.9Ba0.1F2.9 solid-state electrolyte with a nanocomposite of Cu/C as a cathode and a nanocomposite of MgF2, Mg, La0.9Ba0.1T2.9 and C as an anode. The evolution of the morphology, structure, and composition of the electrodes and their interfaces with the electrolyte is characterized using in-situ TEM during electrochemical cycling. The high-resolution transmission electron microscopy (HRTEM) and scanning transmission electron microscopy-energy dispersive X-ray (STEM-EDX) analysis of the cathode-electrolyte interface reveal the expected formation of CuF2 phase during charging. During cycling, grain growth of Cu in the cathode ingredients and Cu diffusion from the cathode into the electrolyte are observed in addition to void formation.

引用

页数：7

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