Abstract
An original method for the synthesis of lithium-vanadium phosphate has been developed, which includes two stages: 1st — heat treatment of a mixture of vanadium oxide and ammonium dihydrophosphate; 2nd — mechanical activation of a mixture of the product obtained at the first stage with lithium hydroxide on Bridgman equipment, followed by heat treatment, and providing a 95 % product yield in a highly dispersed state. It is shown that electrodes based on synthesized Li3V2(PO4)3 are reversibly cycled in the basic 1C mode. Optimization of the ratio of the electrode components showed that its maximum characteristics are achieved with the following ratio between the components: 82 % Li3V2(PO4)3: 10 % carbon black : 8 % solid polymer electrolyte. Solid-phase electrodes based on lithium-vanadium phosphate surpass known analogues with liquid electrolyte in capacity, stability and persistence.
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