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Amorphous Metal Polysulfides: Electrode Materials with Unique Insertion/Extraction Reactions
- Source :
- Journal of the American Chemical Society. 139(26)
- Publication Year :
- 2017
-
Abstract
- A unique charge/discharge mechanism of amorphous TiS4 is reported. Amorphous transition metal polysulfide electrodes exhibit anomalous charge/discharge performance and should have a unique charge/discharge mechanism: neither the typical intercalation/deintercalation mechanism nor the conversion-type one, but a mixture of the two. Analyzing the mechanism of such electrodes has been a challenge because fewer tools are available to examine the “amorphous” structure. It is revealed that the electrode undergoes two distinct structural changes: (i) the deformation and formation of S–S disulfide bonds and (ii) changes in the coordination number of titanium. These structural changes proceed continuously and concertedly for Li insertion/extraction. The results of this study provide a novel and unique model of amorphous electrode materials with significantly larger capacities.
- Subjects :
- Amorphous metal
Chemistry
Coordination number
Intercalation (chemistry)
Inorganic chemistry
chemistry.chemical_element
02 engineering and technology
General Chemistry
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
Biochemistry
Catalysis
0104 chemical sciences
Amorphous solid
chemistry.chemical_compound
Colloid and Surface Chemistry
Chemical engineering
Transition metal
Electrode
0210 nano-technology
Polysulfide
Titanium
Subjects
Details
- ISSN :
- 15205126
- Volume :
- 139
- Issue :
- 26
- Database :
- OpenAIRE
- Journal :
- Journal of the American Chemical Society
- Accession number :
- edsair.doi.dedup.....a33963097272b699e5072dc0fe34df73