US2022371913A1PendingUtilityA1

Ternary precursor particles

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Assignee: XTC NEW ENERGY MAT XIAMEN LTDPriority: Nov 28, 2017Filed: Aug 5, 2022Published: Nov 24, 2022
Est. expiryNov 28, 2037(~11.3 yrs left)· nominal 20-yr term from priority
Inventors:Yue MaJun Zheng
H01M 4/366C01G 53/04C01P 2004/01H01M 4/525C01G 53/40H01M 4/131C01P 2006/11H01M 4/505C01P 2002/50C01P 2004/61H01M 2004/028H01M 10/0525C01P 2004/84C01G 53/50Y02E60/10C01P 2006/40H01M 10/052C01P 2004/32H01M 4/1391C01P 2004/52C01G 53/82
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Claims

Abstract

Ternary precursor particles used for a lithium-ion battery, the ternary precursor particles having a NixCoyMnz(OH)2, wherein, x+y+z=1, 0<x<1, 0<y<1, 0<z<1; each ternary precursor particle is a spheroidal structure, and comprises a shell, a transition layer and a particle core; the shell is a dense structure, the particle core is a porous structure, a density of the shell is greater than a density of the particle core, the transition layer surrounds the particle core and is sandwiched between the shell and the particle core; each ternary precursor particle is a mixture formed by mixing the nickel hydroxide, the cobalt hydroxide and the manganese hydroxide at the atomic level; a crystallinity of the shell is greater than a crystallinity of the transition layer, and the crystallinity of the transition layer is greater than a crystallinity of the particle core.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . Ternary precursor particles for a lithium-ion battery, the ternary precursor particles having a chemical compound of Ni x Co y Mn z (OH) 2 , wherein, x+y+z=1, 0<x<1, 0<y<1, 0<z<1; each of the ternary precursor particles is a spheroidal structure, and comprises a shell, a transition layer and a particle core; the shell is a dense structure, the particle core is a porous structure, a density of the shell is greater than a density of the particle core, the transition layer surrounds the particle core and is sandwiched between the shell and the particle core; each of the ternary precursor particles is a mixture formed by mixing the nickel hydroxide, the cobalt hydroxide and the manganese hydroxide at an atomic level; a crystallinity of the shell is greater than a crystallinity of the transition layer, and the crystallinity of the transition layer is greater than a crystallinity of the particle core. 
     
     
         2 . The ternary precursor particles of  claim 1 , wherein D50 of the ternary precursor particles is between 2 μm and 18 μm, and (D5+D95):D50≤2.2:1; D50 denotes a diameter value of abscissa corresponding to 50% of ordinate accumulation distribution of the ternary precursor particles; D5 denotes a diameter value of abscissa corresponding to 5% of ordinate accumulation distribution of the ternary precursor particles; D95 denotes a diameter value of abscissa corresponding to 95% of ordinate accumulation distribution of the ternary precursor particles. 
     
     
         3 . The ternary precursor particles of  claim 1 , wherein the shell has a thickness of 0.5 μm to 10 μm. 
     
     
         4 . The ternary precursor particles of  claim 1 , wherein a thickness of the transition layer is less than 2 μm. 
     
     
         5 . The ternary precursor particles of  claim 1 , wherein a diameter of the particle core is less than 10 μm. 
     
     
         6 . The ternary precursor particles of  claim 1 , wherein a tap density of the shell is greater than a tap density of the particle core. 
     
     
         7 . The ternary precursor particles of  claim 6 , wherein the tap density of the shell is greater than or equal to 2.5 g/cm 3 . 
     
     
         8 . The ternary precursor particles of  claim 6 , wherein the tap density of the particle core is less than or equal to 3.0 g/cm 3 . 
     
     
         9 . The ternary precursor particles of  claim 6 , wherein the tap density of the particle core distributes in a dense layered gradient. 
     
     
         10 . The ternary precursor particles of  claim 9 , wherein the dense layered gradient is between 2.0 g/cm 3  to 4.2 g/cm 3 . 
     
     
         11 . The ternary precursor particles of  claim 1 , wherein a ratio of a thickness of the shell to a diameter of the particle core is in a range from 1:1 to 1:9. 
     
     
         12 . The ternary precursor particles of  claim 1 , wherein a tap density of the particle core increases from an interior of the particle core to a circumferential region of the particle core. 
     
     
         13 . The ternary precursor particles of  claim 1 , wherein each pore of the particle core has a pore diameter of 0.1 μm to 2 μm. 
     
     
         14 . The ternary precursor particles of  claim 1 , wherein each of the ternary precursor particles has a porosity of 20% to 70%. 
     
     
         15 . The ternary precursor particles of  claim 1 , wherein the ternary precursor particles have a particle diameter of 1 μm to 40 μm.

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