Preparation of Ferromanganese Phosphate by One Step Method
A new method for preparing the precursor material of ferromanganese phosphate was developed.Manganese and iron solution were inflood the reactor,and the temperature was raised to 90 ℃,and then the mixture of KMnO4 and phosphorus solution were added with a peristaltic pump by dripping slowly.With the temperature was continued to rise at 95 ℃,it was filtered and washed after aging for 2 h,after the drip is completed.The obtained filter cake was transferred to a drying oven and dried at 105 ℃ for 12 h to obtain ferromanganese phosphate precursor powder.In this paper,the effects of KMnO4 droplet rate,the amount of NH4H2PO4,the amount of KMnO4,the ratio of iron to manganese and the amount of H3PO4 on the synthesis of ferromanganese phosphate precursor were investigated.After optimization,the sample possess the stable crystal structure,qualified physical and chemical indexes and good electrical properties,and can be used as a precursor for lithium ferro manganese phosphate battery cathode materials.
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