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    • 2. 发明公开
    • Continuous synthesis of carbon-coated lithium-iron-phosphate
    • 锂离子磷酸盐
    • EP2292557A1
    • 2011-03-09
    • EP09011306.9
    • 2009-09-03
    • Clariant International Ltd.
    • Metz, Hans Joachim, Dr.Waser, OliverBüchel, RobertPratsinis, Sotiris E.
    • C01B25/45
    • H01M4/5825B82Y30/00C01B25/37C01P2002/60C01P2002/82C01P2004/62C01P2004/64C01P2004/86C01P2006/12C01P2006/32C01P2006/40H01M4/136H01M4/366H01M4/625
    • The invention relates to a continuous process for preparing carbon-coated lithium-iron-phosphate particles, wherein the carbon-coated lithium-iron-phosphate particles have a mean (d 50 ) particle size of 10 to 150 nm, and wherein the carbon-coating is an acetylene-black coating, comprising performing in a reactor a flame-spray pyrolysis step (i) in a particle formation zone of the reactor, and a carbon-coating step (ii) in a carbon-coating zone of the reactor, wherein in
      (i) a combustible organic solution containing a mixture of lithium or a lithium compound; iron or an iron compound; and phosphorus or a phosphorous compound in an organic solvent, is fed through at least one nozzle where said organic solution is dispersed, ignited and combusted, to give a flame spray thereby forming an aerosol of lithium iron phosphate particles;
      (ii) acetylene gas is injected into said aerosol thereby forming an acetylene-black coating on the lithium iron phosphate particles;
      (iii) the coated particles are cooled by an inert quench gas and collected on a filter.
    • 本发明涉及制备碳涂覆的磷酸铁锂颗粒的连续方法,其中碳涂覆的磷酸铁锂颗粒的平均(d 50)粒径为10〜150nm,其中,碳 - 涂层是乙炔黑涂层,其包括在反应器中在反应器的颗粒形成区域中进行火焰喷射热解步骤(i)和在反应器的碳涂覆区域中的碳涂覆步骤(ii) 其中在(i)含有锂或锂化合物的混合物的可燃性有机溶液中; 铁或铁化合物; 在有机溶剂中的磷或磷化合物通过分散,点燃和燃烧所述有机溶液的至少一个喷嘴进料,得到火焰喷雾,从而形成磷酸铁锂颗粒的气溶胶; (ii)将乙炔气注入所述气溶胶中,由此在磷酸铁锂颗粒上形成乙炔黑涂层; (iii)涂覆的颗粒通过惰性骤冷气体冷却并收集在过滤器上。