Potatolike shaped graphite particles with low impurity rate at the surface, process for preparing same
US9508983B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 5, 2015 |
| Grant date | Nov 29, 2016 |
| Priority date | — |
| Expiry date | Nov 5, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2991
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for modifying graphite particles having a prismatic shape or a cylindrical shape characterized by an edge function fe and a basal function fb, said method providing increase of the edge function and lowering of the basal function, wherein the method includes submitting the graphite particles to at least one physical means selected from attrition, jet mill, ball mill, hammer mill, or atomizer mill, in the presence of at least one chemical compound chosen from the group of compounds of the formula MFz, in which M represents an alkaline or alkaline-earth metal and z represents 1 or 2, NaCl and NH4F or a mixture thereof, said compound or compounds being added in solid form, at the beginning of the step using the physical means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.