SPHÄROIDISCHE GRAPHITTEILCHEN MIT EINEM NIEDRIGEN GEHALT AN OBERFLÄCHENVERUNREINIGUNGEN SOWIE VERFAHREN ZU DEREN HERSTELLUNG

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.