A Direct Real-Time Observation of Anion Intercalation in Graphite Process and Its Fully Reversibility by SAXS/WAXS Techniques

被引：10

作者：

Greco, Giorgia ^{[1
,2
,6
]}

Elia, Giuseppe Antonio ^{[3
,7
]}

Hermida-Merino, Daniel ^{[4
,8
]}

Hahn, Robert ^{[3
,5
]}

Raoux, Simone ^{[1
]}

机构：

[1] Helmholtz Zent Berlin Materialien & Energie GmbH, Hahn Meitner Pl 1, D-14109 Berlin, Germany

[2] Sapienza Univ Rome, Chem Dept, Ple Aldo Moro 5, I-00185 Rome, Italy

[3] Tech Univ Berlin, Res Ctr Microperipher Technol, Gustav Meyer Allee 25, D-13355 Berlin, Germany

[4] ESRF, DUBBLE Dutch Belgian Beamline BM26, 6 Rue Jules Horowitz, BP 220, F-38043 Grenoble 9, France

[5] Fraunhofer IZM, Inst Zuverlassigkeit & Mikrointegrat, Gustav Meyer Allee 25, D-13355 Berlin, Germany

[6] ENEA Ctr Ric Casaccia, Dept Fus & Technol Nucl Safety & Secur, Via Anguillarese 301, I-00123 Rome, Italy

[7] Politecn Torino, Dept Appl Sci & Technol DISAT, Corso Duca Abruzzi 24, I-10129 Turin, Italy

[8] Univ Vigo, Dept Fis Aplicada, CINBIO, Campus Lago Asmarcosende, Vigo 36310, Spain

来源：

SMALL METHODS | 2023年 / 7卷 / 06期

关键词：

aluminum graphite dual ions; energy materials; graphite intercalation compounds; materials science; operando characterization; small; wide angles; thermodynamic aspects; ION BATTERIES; ELECTROCHEMICAL INTERCALATION; ALUMINUM; LITHIUM;

D O I：

10.1002/smtd.202201633

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：

The process of anion intercalation in graphite and its reversibility plays a crucial role in the next generation energy-storage devices. Herein the reaction mechanism of the aluminum graphite dual ion cell by operando X-ray scattering from small angles to wide angles is investigated. The staging behavior of the graphite intercalation compound (GIC) formation, its phase transitions, and its reversible process are observed for the first time by directly measuring the repeated intercalation distance, along with the microporosity of the cathode graphite. The investigation demonstrates complete reversibility of the electrochemical intercalation process, alongside nano- and micro-structural reorganization of natural graphite induced by intercalation. This work represents a new insight into thermodynamic aspects taking place during intermediate phase transitions in the GIC formation.

引用

页数：8

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