• 专利标题:   Preparing sodium-iron ortho-pyrophosphate useful in sodium ion battery anode comprises e.g. dispersing ferric phosphate, sodium source, phosphorus source and carbon source in de-ionized water, placing in sand mill, and grinding.
  • 专利号:   CN113060714-A, CN113060714-B
  • 发明人:   CAO Y, CHEN C, FU C, ZHAO A, XIONG J, WANG Q, CHEN S
  • 专利权人:   HUBEI WANRUN NEW ENERGY TECHNOLOGY DEV
  • 国际专利分类:   C01B025/45, H01M010/054, H01M004/58
  • 专利详细信息:   CN113060714-A 02 Jul 2021 C01B-025/45 202169 Pages: 9 Chinese
  • 申请详细信息:   CN113060714-A CN10207075 25 Feb 2021
  • 优先权号:   CN10207075

▎ 摘  要

NOVELTY - Preparing sodium-iron ortho-pyrophosphate comprises (1) dispersing ferric phosphate, sodium source, phosphorus source and carbon source uniformly in the de-ionized water, (2) placing the dispersion in the sand mill, adding sand grinding medium, wet sand grinding for 3-12 hours, controlling the grain diameter between 1-0.1 mu m, (3) placing the reaction liquid after grinding into the spray dryer, spraying and granulating, (4) sintering the powder after spraying in inert atmosphere to obtain sodium-iron ortho-pyrophosphate, where the sintering temperature is 400-650 degrees C, and the time is 4-15 hours. USE - The method is useful for preparing sodium-iron ortho-pyrophosphate, which is useful in sodium ion battery anode. ADVANTAGE - The sodium-iron ortho-pyrophosphate: is economical; has stable structure, and excellent cycle performance. The method: is simple, and easy to amplify.