Electrochemical performance as cathode of lithium iron silicate, borate and phosphate glasses with different Fe2+ fractions
| Autor: | Tsuyoshi Honma, Takayuki Komatsu, Takuya Togashi, Kenji Shinozaki |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science Lithium vanadium phosphate battery Inorganic chemistry chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics Electrochemistry 01 natural sciences Lithium-ion battery Cathode Silicate Electronic Optical and Magnetic Materials law.invention Ion chemistry.chemical_compound chemistry law 0103 physical sciences Materials Chemistry Ceramics and Composites Lithium 0210 nano-technology Boron |
| Zdroj: | Journal of Non-Crystalline Solids. 436:51-57 |
| ISSN: | 0022-3093 |
| DOI: | 10.1016/j.jnoncrysol.2016.02.001 |
| Popis: | Lithium iron silicate glasses with different fractions of Fe 2 + ions of 40Li 2 O–10Fe 2 O 3 –50SiO 2 (mol%) are prepared by conventional melt-quenching method and reducing heat treatment technique, and their electrochemical properties as cathode materials for Li + ion secondary batteries (LIBs: lithium ion batteries) are examined. It is demonstrated for the first time that Li 2 O–Fe 2 O 3 –SiO 2 glasses work as cathode in LIBs, e.g., the discharge capacity at 100/C in the first cycle is 54.6 mAh g − 1 . The heat treatment at 350 °C in 5% H 2 /Ar induces not only the increase in the fraction of Fe 2 + ions but also the increase in the packing density and the decrease in the electrical conductivity. It is clarified that the discharge capacity of the glasses is largely improved due to the increase in the fraction of Fe 2 + ions. The data on thermal, physical, and discharge properties obtained in 40Li 2 O–10Fe 2 O 3 –50SiO 2 glasses are compared with those in borate and phosphate glasses of 40Li 2 O–10Fe 2 O 3 –50(B 2 O 3 , P 2 O 5 ). |
| Databáze: | OpenAIRE |
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