NEW PROCESS FOR OBTAINING NATURAL GRAPHITE PARTICLES IN SPHERICAL SHAPE: MODELLING AND APPLICATION

摘要

The invention concerns modified graphite particles obtained from graphite or based on graphite, said particles having impurities in their internal structure and having, at the surface, a low, even nil, rate of an impurity or several impurities. Said particles further comprise at least one of the following characteristics: a tab density ranging between 0.3 and 1.5 g/cc; the shape of a potato; and a size distribution such that the D90/D10 ratio varies between 2 and 5 and the particles have a size ranging between 1 and 50 mum. Said particles are useful for fuel cells, electrochemical generators or moisture sensor and/or oxygen sensor and they have interesting electrochemical properties. The resulting electrochemical cells and batteries are stable and safe.