Description
Lithium dihydrogen phosphate, also known as LDP, is a White crystalline powder with the formula LiH2PO4. It is soluble in water. LiH2PO4 is usually prepared by a stoichiometric reaction of Li2СO3 and 85% orthophosphoric acid[1]. It is often used as a raw material for the preparation of cathode materials for lithium batteries or as phosphate in chemical reactions.
Chemical Properties
White crystalline powder
Uses
Lithium Dihydrogen Phosphate is used in preparation method of lithium hydroxide from lithium-containing low-magnesium brine in lithium phosphate manner.
Uses
Precursor for LiMX2O7 (M = Fe, V; x =P, As) cathode materials.1
General Description
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Solubility in water
At 0°C， the solubility of lithium dihydrogen phosphate in water is about 55.8wt % (126.2 g of LiH2PO4 /100 g of water)[1].
At 22°C, the solubility of lithium dihydrogen phosphate corresponds to ~ 153.8 g of LiH2PO4/100 g of water.
At 25°C, it doesn't dissolve in water[2].
References
[1] A.P. Voronov, G.N. Babenko, V.M. Puzikov, A.N. Iurchenko, Growth of LiH2PO4 single crystals from phosphate solutions, Journal of Crystal Growth, 2013, 374, 49–52.
[2] R. W. Berg, A. V. Nikiforov, N. J. Bjerrum, Vapor pressure and specific electrical conductivity in the H2O–LiH2PO4–LiPO3 system—a novel electrolyte for water electrolysis at elevated temperature.Ionics, 2021, 27, 703–719.
