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1. WO2022022198 - MODIFIED HIGH-NICKEL POSITIVE ELECTRODE MATERIAL AND PREPARATION METHOD THEREFOR

Publication Number WO/2022/022198
Publication Date 03.02.2022
International Application No. PCT/CN2021/103022
International Filing Date 29.06.2021
IPC
H01M 4/525 2010.1
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of, or comprising, active material
36Selection of substances as active materials, active masses, active liquids
48of inorganic oxides or hydroxides
52of nickel, cobalt or iron
525of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 4/485 2010.1
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of, or comprising, active material
36Selection of substances as active materials, active masses, active liquids
48of inorganic oxides or hydroxides
485of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
H01M 10/0525 2010.1
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
10Secondary cells; Manufacture thereof
05Accumulators with non-aqueous electrolyte
052Li-accumulators
0525Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
C01G 53/00 2006.1
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
GCOMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F94
53Compounds of nickel
CPC
C01G 53/00
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
GCOMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
53Compounds of nickel
C01G 53/42
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
GCOMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
53Compounds of nickel
40Nickelates
42containing alkali metals, e.g. LiNiO2
C01G 53/50
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
GCOMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
53Compounds of nickel
40Nickelates
42containing alkali metals, e.g. LiNiO2
44containing manganese
50of the type [MnO2]n- , e.g. Li(NixMn1-x)O2, Li(MyNixMn1-x-y)O2
C01P 2002/72
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
2002Crystal-structural characteristics
70defined by measured X-ray, neutron or electron diffraction data
72by d-values or two theta-values, e.g. as X-ray diagram
C01P 2002/77
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
2002Crystal-structural characteristics
70defined by measured X-ray, neutron or electron diffraction data
77by unit-cell parameters, atom positions or structure diagrams
C01P 2004/03
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
2004Particle morphology
01depicted by an image
03obtained by SEM
Applicants
  • 巴斯夫杉杉电池材料有限公司 BASF SHANSHAN BATTERY MATERIALS CO., LTD. [CN]/[CN]
Inventors
  • 莫孟霞 MO, Mengxia
  • 于海洋 YU, Haiyang
  • 唐波 TANG, Bo
  • 韩圭奭 HAN, Guishi
Agents
  • 长沙朕扬知识产权代理事务所(普通合伙) CHANGSHA ZONEYOUNG INTELLECTUAL PROPERTY AGENCY (GENERAL PARTNERSHIP)
Priority Data
202010748864.730.07.2020CN
Publication Language Chinese (zh)
Filing Language Chinese (ZH)
Designated States
Title
(EN) MODIFIED HIGH-NICKEL POSITIVE ELECTRODE MATERIAL AND PREPARATION METHOD THEREFOR
(FR) MATÉRIAU D'ÉLECTRODE POSITIVE À HAUTE TENEUR EN NICKEL MODIFIÉ ET SON PROCÉDÉ DE PRÉPARATION
(ZH) 一种改性高镍正极材料及其制备方法
Abstract
(EN) The present invention discloses a modified high-nickel positive electrode material, which is a high-nickel positive electrode material modified by SO4 2- doping. SO4 2- is distributed in secondary particles of the modified high-nickel positive electrode material according to a gradient of high content inside and low content outside. The preparation method therefor comprises: mixing and sintering a high-nickel positive electrode material, a lithium source, and a sulfate to obtain a base material; and washing and drying the base material to obtain a modified high-nickel positive electrode material. SO4 2- is distributed in secondary particles according to a gradient of high content inside and low content outside. Since more O-S-O bonds and cations that attract each other are present inside, the migration rate of lithium ions inside the material is increased, and the initial capacity of the material is greatly increased. Since a lower content of SO4 2- is present outside, and the content of corresponding inactive lithium substance is lower, the energy barrier of lithium ion migration between primary particles is reduced, and the migration rate of the lithium ions between the primary particles of the material is increased. In addition, the side reaction between Li2SO4 and an electrolyte is also reduced, thereby improving the safety performance of the material.
(FR) La présente invention concerne un matériau d'électrode positive à haute teneur en nickel modifié, qui est un matériau d'électrode positive à haute teneur en nickel modifié par dopage avec SO4 2-. SO4 2- est distribué dans des particules secondaires du matériau d'électrode positive à haute teneur en nickel modifié est distribué dans des particules secondaires selon un gradient à haute teneur à l'intérieur et à faible teneur à l'extérieur. Le procédé de préparation associé comprend : le mélange et le frittage d'un matériau d'électrode positive à haute teneur en nickel, d'une source de lithium et d'un sulfate pour obtenir un matériau de base ; et le lavage et le séchage du matériau de base pour obtenir un matériau d'électrode positive à haute teneur en nickel modifié. SO4 2- est distribué dans des particules secondaires selon un gradient à haute teneur à l'intérieur et à faible teneur à l'extérieur. Étant donné que plus de liaisons O-S-O et de cations qui s'attirent les uns les autres sont présents à l'intérieur, le taux de migration des ions lithium à l'intérieur du matériau est augmenté, et la capacité initiale du matériau est fortement augmentée. Étant donné qu'une teneur inférieure en SO4 2- est présente à l'extérieur, et que la teneur en substance au lithium inactive correspondante est inférieure, la barrière énergétique de migration des ions lithium entre les particules primaires est réduite, et le taux de migration des ions lithium entre les particules primaires du matériau est augmenté. De plus, la réaction secondaire entre Li2SO4 et un électrolyte est également réduite, ce qui permet d'améliorer les performances de sécurité du matériau.
(ZH) 本发明公开了一种改性高镍正极材料,为SO42-掺杂改性的高镍正极材料,SO42-在改性高镍正极材料的二次颗粒中呈内高外低的梯度分布。其制备方法为将高镍正极材料、锂源、硫酸盐进行混合,烧结,得到基体材料;对所述基体材料进行水洗、干燥,得改性高镍正极材料。SO42-在二次颗粒中呈内高外低的梯度分布,内部较多的O-S-O键和阳离子相互吸引,提升了锂离子在材料内部的迁移速率,大幅度提高了材料的初始容量;外部较低的SO42-,所对应的非活性锂物质含量较低,降低了锂离子在一次颗粒间迁移的能垒,提升锂离子在材料一次颗粒间的迁移速率,同时还减少了Li2SO4与电解液之间的副反应,提高了材料的安全性能。
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