Published November 1989
| Version v1
Journal article
Electrochemistry of pyrite-based cathodes for ambient temperature lithium batteries
Creators
- 1. Moli Energy Ltd., Burnaby, BC (Canada)
- 2. Simon Fraser Univ., Burnaby, BC (Canada). Dept. of Chemistry
Description
The charge and discharge mechanisms of Li/FeS2 and Li/Li2 FeS2 cells near room temperature are studied by in situ x-ray diffraction and in situ 57Fe Mossbauer spectroscopy. The electrochemical behavior of these cells are compared, and their cell reactions are described, For 00.8, structural decomposition of Li2-x FeS2 occurs, and disproportionation to nonstoichiometric FeS (FeSy) and S is observed. Similarly, when Li/FeS2 cells are recharged to 2.8V, the cathode is a mixture of FeSy and S. Examination of the mixture by differential scanning calorimetry shows that FeSy and S react to form FeS2 above 200 degrees C. This explains why high temperature Li/FeS2 cells reversibly while ambient temperature Li/FeS2 cells show poor reversibility
Additional details
Publishing Information
- Journal Title
- Journal of the Electrochemical Society
- Journal Volume
- 136
- Journal Issue
- 11
- Series
- J. Electrochem. Soc.
- Journal Page Range
- 3206-3209
- ISSN
- 0013-4651
- CODEN
- JESOA
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 21050823
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Descriptors DEI
- CATHODES; CHEMICAL COMPOSITION; ELECTRIC BATTERIES; ELECTROCHEMISTRY; HIGH TEMPERATURE; IRON SULFIDES; LITHIUM; MATERIALS TESTING; MICROSTRUCTURE; MOESSBAUER EFFECT; MOESSBAUER SPECTROMETERS; PYRITE; X-RAY DIFFRACTION
- Descriptors DEC
- ALKALI METALS; CHALCOGENIDES; COHERENT SCATTERING; CRYSTAL STRUCTURE; DIFFRACTION; ELECTRODES; ELEMENTS; ENERGY STORAGE SYSTEMS; GAMMA SPECTROMETERS; IRON COMPOUNDS; MEASURING INSTRUMENTS; METALS; MINERALS; SCATTERING; SPECTROMETERS; SULFIDE MINERALS; SULFIDES; SULFUR COMPOUNDS; TESTING; TRANSITION ELEMENT COMPOUNDS