Transport and electrochemical properties of orthorhombic LiMnO2 cathode material for Li-ion batteries

• Autorzy: Molenda J. , Ziemnicki M. , Bućko M. , Marzec J.
• Konferencja: IX National Conference on Fast Ion Conductors , Wrocław-Borowice , 9-12 December 2004
• Języki publikacji: EN

Abstrakty

EN

The aim of this paper was to determine the temperature range of thermal stability of orthorhombic LiMnO2, together with its electrical and electrochemical characterization. High-temperature studies of the electrical properties of orthorhombic LiMnO2 point to structural instability of the phase at temperatures over 400 ?C. Annealing above 400 ?C leads to its decomposition into a two-phase mixture (Li2MnO3 + LiMn2O4). Stoichiometric LiMnO2 has a very low conductivity at room temperature, which limits the effectiveness of intercalation at the initial stage. The temperature dependences of the electrical conductivity and thermoelectric power of deintercalated LiyMnO2 samples indicate a dominant electronic conductivity over the ionic one. A remarkable increase in electronic conductivity accompanied by a drop of activation energies is observed upon deintercalation. It was shown that the deintercalation of lithium from LiyMnO2 makes the structure less stable, leading to a two-phase mixture (LizMnO2 + LixMn2O4). s. 75-83, bibliogr. 4 poz.

Słowa kluczowe

EN

orthorhombic LiMnO2; thermal stability; electrical properties; intercalation; Li-ion battery

PL

LiMnO2 rombowy; termostabilność; właściwości elektryczne; interkalacja; litowa bateria jonowa

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2006
• Tom: Vol. 24, No. 1
• Strony: 75--83
• Opis fizyczny: Bibliogr. 4 poz.

Twórcy

autor

Molenda J.

autor

Ziemnicki M.

autor

Bućko M.

autor

Marzec J.

• AGH University of Science and Technology, Faculty of Materials Science and Ceramics, al. Mickiewicza 30, 30-059 Kraków,

Bibliografia

• [1] CHEN C.J., GREENBLATT M., WASZCZAK J.V., J. Solid State Chem., 64 (1986), 24.
• [2] WU Q., LI X., YAN M., JIANG Z., Electrochem. Commun., 5 (2003), 878.
• [3] MOLENDA J. (in preparation).
• [4] MOLENDA J., SWIERCZEK K., KUCZA W., MARZEC J., STOKŁOSA A., Solid State Ionics, 123 (1999), 155.