公开(公告)号：US11708280B2

公开(公告)日：2023-07-25

申请号：US17848405

申请日：2022-06-24

申请人： GEM CO., LTD. ,  JINGMEN GEM CO., LTD.

发明人： Kaihua Xu ,  Zhenkang Jiang ,  Kun Zhang ,  Xiaofei Xue ,  Cong Li ,  Haibo Sun ,  Kang Chen ,  Jun Li ,  Liangjiao Fan

IPC分类号： C01G53/00 ,  C01G45/12 ,  C01G51/00 ,  H01M10/0525

CPC分类号： C01G53/44 ,  C01G45/1214 ,  C01G51/44 ,  H01M10/0525 ,  C01P2006/40 ,  H01M2220/20

摘要： The present invention provides a method of preparing an MOF-coated monocrystal ternary positive electrode material. Firstly, a solution A of nickel, cobalt and manganese metal salts, an ammonia complexing agent solution and a caustic soda liquid are added to a reactor for reaction to obtain a precursor core; then, an organic carboxylate is dissolved in an amount of an organic solvent to obtain a solution B; the solution B and a manganese metal salt solution with a given concentration are added to the reactor and aged to obtain an MOF-coated core-shell structure precursor; the core-shell structure precursor is pre-sintered at a low temperature to obtain a nickel-cobalt-manganese oxide with monocrystal structure; the nickel-cobalt-manganese oxide with monocrystal structure is uniformly mixed with LiOH·H2O in a mortar and then calcined at a high temperature to obtain an MOF-coated monocrystal ternary positive electrode material.

公开(公告)号：US11695170B2

公开(公告)日：2023-07-04

申请号：US17789970

申请日：2019-12-31

申请人： JINGMEN GEM CO., LTD ,  GEM CO., LTD

发明人： Kaihua Xu ,  Zhenkang Jiang ,  Qinxiang Li ,  Kun Zhang ,  Wenjie Wang ,  Jun Wang ,  Shihong Wen

IPC分类号： C01D15/04 ,  C01F5/28 ,  H01M10/54 ,  C01F11/22 ,  C01G45/00 ,  C01G51/00 ,  C01G53/00 ,  C22B3/00 ,  C22B47/00

CPC分类号： H01M10/54 ,  C01D15/04 ,  C01F5/28 ,  C01F11/22 ,  C01G45/003 ,  C01G51/003 ,  C01G53/003 ,  C22B23/0453 ,  C22B47/00

摘要： Provided are a battery-level Ni—Co—Mn mixed solution and a preparation method for a battery-level Mn solution, the steps thereof comprising: acid dissolution (S1), alkalization to remove impurities (S2), synchronous precipitation of calcium, magnesium, and lithium (S3), deep ageing to remove impurities (S4), synergistic extraction (S5), and refining extraction (S6). The steps of deep ageing to remove impurities (S4) and synergistic extraction (S5) comprise: performing deep ageing on a filtrate obtained from the step of synchronous precipitation of calcium, magnesium, and lithium (S3), and after performing filtration to remove impurities, obtaining an aged filtrate; using P204 to extract the aged filtrate and obtain a loaded organic phase, and subjecting the loaded organic phase to staged back-extraction to obtain the battery-level Ni—Co—Mn mixed solution and a Mn-containing solution. By means of the cooperation between the multiple process steps of synchronous precipitation of calcium, magnesium, and lithium (S3), deep ageing to remove impurities (S4), and synergistic extraction (S5), the impurity content of the obtained battery-level Ni—Co—Mn mixed solution is significantly lowered, and the battery-level Ni—Co—Mn mixed solution can be directly used to prepare a lithium battery ternary precursor material. At the same time, the battery-level Mn solution can also be obtained, which is favorable for large-scale applications of the process and increasing economic benefits.