Patent ID: 7744835

Claim:
A process for the preparation of a carbonaceous material comprising preparing a carbonaceous precursor gel and subjecting said gel to a heat treatment, wherein: the precursor gel is prepared by bringing carbon, α-V 2 O 5 and a Li precursor into contact in a reaction medium in amounts such that the ratio of the [α-V 2 O 5 ]/[Li] molar concentrations is between 1.15 and 1.5 and that the (carbon)/(carbon+α-V 2 O 5 +Li precursor) ratio by weight is from 10 to 15%; and the heat treatment is carried out in two stages: a first stage at a temperature of between 80° C. and 150° C. for a time of 3 to 12 hours and a second stage under a nitrogen or argon atmosphere at a temperature of between 300° C. and 350° C. for a time of between 10 min and 1 hour.