Positive electrode materials having a superior hardness strength
US10833328B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 1, 2015 |
| Grant date | Nov 10, 2020 |
| Priority date | — |
| Expiry date | Dec 10, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A powderous positive electrode material for a lithium secondary battery, the material having the general formula Li1+x[Ni1−a−b−cMaM′bM″c]1−xO2−z; M being either one or more elements of the group Mn, Zr and Ti, M′ being either one or more elements of the group Al, B and Co, M″ being a dopant different from M and M′, x, a, b and c being expressed in mol with −0.02≤x≤0.02, 0≤c≤0.05, 0.10≤(a+b)≤0.65 and 0≤z≤0.05; and wherein the powderous material is characterized by having a BET value ≤0.37 m2/g, a Dmax<50 μm, and a hardness strength index ΔΓ(P) of no more than 100%+(1−2a−b)×160% for P=200 MPa, wherein (Formula I) (I) with D 10p=0 being the D10 value of the unconstrained powder (P=0 M Pa), r°(D 10p=0) being the cumulative volume particle size distribution of the unconstrained powder at D 10p=0, and Γp(D 10p=0) being the cumulative volume particle size distribution at D10p=0 of the pressed samples with P being expressed in M Pa.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.