Chromium oxides as cathodes for secondary high energy density lithium batteries

Journal Article · Fri Jul 01 04:00:00 EDT 1977 · J. Electrochem. Soc.; (United States)

DOI:https://doi.org/10.1149/1.2133510· OSTI ID:5099274

Besenhard, J O ^[1]; Schoellhorn, R

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1. Univ., Munich

The electrochemical reduction and reoxidation of Cr/sub 2/O/sub 5/, Cr/sub 3/O/sub 8/, thermally decomposed CrO/sub 3/, and a commercially available ''CrO/sub 3/-graphite'' preparation are compared in organic Li/sup +/ electrolytes. All these cathode materials reveal an average discharge voltage of approximately 3V vs. a lithium anode and a maximum charge transfer exceeding one electron per Cr atom. The basic general discharge reaction is shown to be the reduction of higher chromium oxides Cr/sub n/O/sub m/ with 1.5 < m/n < 3. CrO/sub 3/ itself does not represent a suitable cathode material. From structural consideraions it is concluded that the electrode processes are likely to be topotactic reactions of chromium oxides, yielding ternary phases Li/sub x/Cr/sub n/O/sub m/ which can be reoxidized with high coulombic efficiency.

• OSTI ID: 5099274
• Journal Information: J. Electrochem. Soc.; (United States), Journal Name: J. Electrochem. Soc.; (United States) Vol. 124:7; ISSN JESOA
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
250903* -- Energy Storage-- Batteries-- Materials
Components
&amp; Auxiliaries
ALKALI METALS
CATHODES
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISTRY
CHROMIUM COMPOUNDS
CHROMIUM OXIDES
ELECTRIC BATTERIES
ELECTRIC POTENTIAL
ELECTROCHEMICAL CELLS
ELECTROCHEMISTRY
ELECTRODES
ELECTROLYTES
ELEMENTS
ENERGY STORAGE SYSTEMS
LITHIUM
METAL-METAL OXIDE BATTERIES
METALS
ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
REDUCTION
TRANSITION ELEMENT COMPOUNDS