Electrochemical lithium intercalation into Nb{sub 2}O{sub 5} cathode for 2V class-secondary lithium batteries
Conference
·
OSTI ID:20086862
Nb{sub 2}O{sub 5} powder was prepared by heating niobium hydroxide in the temperature range from 600 to 1,000 C. The crystal system of Nb{sub 2}O{sub 5} compounds depended on the heating temperatures, i.e., hexagonal, orthorhombic and monoclinic Nb{sub 2}O{sub 5} compounds were obtained at 600, 800 and 1,000 C, respectively. Electrochemical lithium intercalation into the three Nb{sub 2}O{sub 5} compounds was investigated in a cell with an LiClO{sub 4}-propylene carbonate electrolytic solution for the application as lithium battery cathodes. As a result, they displayed good charge-discharge performance as the cathode of 2 V class-lithium battery, which will play important role in power supply for IC memory backup developed recently. The thermodynamics and kinetics of the lithium intercalation into the Nb{sub 2}O{sub 5} cathode have been investigated. The thermodynamic parameters, such as standard free energies, lithium partial molar entropy, interaction energies between ions, the crystal lattice parameters, and the kinetic parameters, such as chemical and self diffusion constants, have been obtained as a function of x-value in Li{sub x}Nb{sub 2}O{sub 5}.
- Research Organization:
- Iwate Univ., Morioka (JP)
- OSTI ID:
- 20086862
- Country of Publication:
- United States
- Language:
- English
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