Synthesis of a Polyanion Cathode Material, Li[sub 2]Co[sub 2](MoO[sub 4])[sub 3], and Its Electrochemical Properties for Lithium Batteries
High voltage redox properties of a polyanion material, Li2Co2(MoO4)(3), as positive electrode was demonstrated against lithium for the first time. The orthorhombic structure showed reversible extraction and insertion cycles of lithium at a potential of ca. 4.9 V vs. Li+/Li as well as 1.5 V. The form...
| Main Authors: | , , |
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| Format: | Article |
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2004
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| Online Access: | http://shdl.mmu.edu.my/2492/ |
| Summary: | High voltage redox properties of a polyanion material, Li2Co2(MoO4)(3), as positive electrode was demonstrated against lithium for the first time. The orthorhombic structure showed reversible extraction and insertion cycles of lithium at a potential of ca. 4.9 V vs. Li+/Li as well as 1.5 V. The former potential was attributed to Co2+/Co3+ and the latter to Mo6+/Mo5+. The reason for the change in charge/discharge curves after the first charge is clearly demonstrated by the structural changes (monoclinic, P2/m) caused by electrochemical extraction and insertion of lithium as deduced from the ex situ X-ray diffraction analysis on the cycled electrode pellet. (C) 2004 The Electrochemical Society. |
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