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Carboxyl-conjugated phthalocyanines used as novel electrode materials with high specific capacity for lithium-ion batteries.
- Source :
- Journal of Solid State Electrochemistry; May2016, Vol. 20 Issue 5, p1285-1294, 10p
- Publication Year :
- 2016
-
Abstract
- A novel molecular model of carbonyl-substituted phthalocyanine compounds used as the cathode material in a lithium-ion battery is demonstrated. Tetra-carboxyl and octa-carboxyl groups are substituted onto a phthalocyanine-conjugated system. The conductivities of phthalocyanine compounds are effectively improved by I doping, without affecting the capacity and energy density. Taking lithium as the counter-electrode, the electrochemical properties of the microparticles are investigated, and the electrochemical mechanism of carboxyl groups substituted with phthalocyanines is analyzed. The results indicate that carboxyl-substituted phthalocyanines have high specific capacities. After 20 or 50 cycles, they still retain capacities of about 300 and 500 mA · h/g for tetra-carboxyl- and octa-carboxyl-substituted phthalocyanines, respectively. The multiple carbonyl groups and the large numbers of electrons on the phthalocyanine-conjugated system are the two factors contributing to the high specific capacity. [ABSTRACT FROM AUTHOR]
- Subjects :
- PHTHALOCYANINES
ELECTRODES
LITHIUM-ion batteries
ELECTROCHEMISTRY
MOLECULAR models
Subjects
Details
- Language :
- English
- ISSN :
- 14328488
- Volume :
- 20
- Issue :
- 5
- Database :
- Complementary Index
- Journal :
- Journal of Solid State Electrochemistry
- Publication Type :
- Academic Journal
- Accession number :
- 117357744
- Full Text :
- https://doi.org/10.1007/s10008-016-3126-6