Process for the preparation of silicon-containing composite particles
AssigneeNexeon Limited
InventorsJose MEDRANO CATALAN, Markus ANDERSSON
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Abstract
The invention relates to a process for preparing composite particles, the process comprising the steps of: (a) providing a plurality of porous particles in a pressure reactor; (b) contacting the plurality of porous particles with a silicon precursor gas at conditions effective to cause deposition of silicon in the pores of the porous particles to provide composite particles comprising a porous particle framework and elemental silicon within the pores of the porous particle framework; and (c) during step (b), withdrawing an effluent gas from the pressure reactor, wherein the silicon precursor gas is introduced into the pressure reactor continuously.
Claims22
A process for preparing composite particles, the process comprising the steps of:
- (a) providing a plurality of porous particles in a pressure reactor;
- (b) contacting the plurality of porous particles with a silicon precursor gas at conditions effective to cause deposition of silicon in the pores of the porous particles to provide composite particles comprising a porous particle framework and elemental silicon within the pores of the porous particle framework;
- and
- (c) during step (b), withdrawing an effluent gas from the pressure reactor,
- wherein the silicon precursor gas is introduced into the pressure reactor continuously.
A process for preparing composite particles, the process comprising the steps of:
- (a) providing a plurality of porous particles in a pressure reactor;
- (b) contacting the plurality of porous particles with a silicon precursor gas at conditions effective to cause deposition of silicon in the pores of the porous particles to provide composite particles comprising a porous particle framework and elemental silicon within the pores of the porous particle framework;
- and
- (c) during step (b), withdrawing an effluent gas from the pressure reactor;
- wherein the silicon precursor gas is introduced into the pressure reactor continuously;
- wherein the linear gas velocity of the silicon precursor gas in the pressure reactor in step (b) is maintained in the range from 0.001 m/min to 0.4 m/min;
- and
- wherein the conditions in step (b) include a pressure in the range from 120 to 5000 kPa.
A process for preparing composite particles, the process comprising the steps of:
- (a) providing a plurality of porous particles in a pressure reactor;
- (b) contacting the plurality of porous particles with a silicon precursor gas at conditions effective to cause deposition of silicon in the pores of the porous particles to provide composite particles comprising a porous particle framework and elemental silicon within the pores of the porous particle framework, wherein the silicon precursor gas is introduced into the pressure reactor continuously;
- (c) during step (b), withdrawing an effluent gas from the pressure reactor;
- and
- (d) contacting the composite particles with a passivating agent under conditions that are effective to passivate the composite particles, wherein the composite particles are contacted with the passivating agent in the pressure reactor.
Dependencies are inferred from the claim text.