Proof of Intercrystallite Ionic Transport in LiMPO4 Electrodes (M = Fe, Mn)
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- Proof of Intercrystallite Ionic Transport in LiMPO4 Electrodes (M = Fe, Mn)
- Lee, Kyu Tae; Kan, Wang H.; Nazar, Linda F.
- Electrochemical potential difference; Heterogeneous particles; Ionic transports; Single particle; Thermodynamic characteristics; Two phasis
- Issue Date
- AMER CHEMICAL SOC
- JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, v.131, no.17, pp.6044 - 6045
- Homogeneous-sized LiMPO4 (M = Fe, Mn) nanorods and bulk particles were synthesized, and the thermodynamic characteristics of their mixtures as electrodes were analyzed to study the lithiation/delithiation mechanism for the general case of nanoparticles with a heterogeneous particle size distribution. We show that ionic transport occurs between nano and bulk particles in a cell at equilibrium, due to their electrochemical potential difference that originates from their different thermodynamic properties. This means that one phase in a single particle is preferred to two phases in a single particle during lithiation/delithiation of LiMPO4 from the viewpoint of thermodynamics if the electrode is composed of differing particle sizes.
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