• 专利标题:   Preparing lithium iron phosphate, useful in battery of power automobile comprises e.g. recycling waste lithium iron phosphate, dissolving soluble iron salt in water, adding lithium iron phosphate, and dispersing, adding hydrogen peroxide and phosphorus source, and adding materials.
  • 专利号:   CN115259129-A, CN115259129-B
  • 发明人:   ZHOU L, WANG W, YE J
  • 专利权人:   CHUNENG NEW ENERGY CO LTD
  • 国际专利分类:   C01B025/45, H01M010/54, H01M004/58
  • 专利详细信息:   CN115259129-A 01 Nov 2022 C01B-025/45 202301 Chinese
  • 申请详细信息:   CN115259129-A CN11158881 22 Sep 2022
  • 优先权号:   CN11158881

▎ 摘  要

NOVELTY - Preparing lithium iron phosphate, comprises (i) recycling waste lithium iron phosphate, (ii) dissolving the soluble iron salt in water, then adding the lithium iron phosphate, and dispersing to obtain a dispersion, (iii) heating the dispersion liquid to 40-80℃, stirring, adding hydrogen peroxide and phosphorus source, keeping the pH value at 1-3 during the addition process, adding materials, stirring at 80-95℃ for 4-8 hours, filtering, washing to obtain the precursor, (iv) adding lithium source, carbon source and water, so that the molar ratio of lithium and iron is (1-1.10):1, mixing evenly, drying and placing in a bowl, and (v) calcining, and pulverizing the discharged material to obtain lithium iron phosphate material with a particle size of 0.6-2 μm. USE - The method is useful for preparing lithium iron phosphate, which is useful in battery of power automobile and energy storage and lithium-ion battery anode field. ADVANTAGE - The method provides lithium iron phosphate with high pressure solid density, low cost and high compaction density.