Method for producing an electrode having a core-shell type nanocomposite material of which the core is made of silicon and the shell made of carbon, characterised in that it comprises the following steps: A) synthesising the nanocomposite material according to the following sub-steps: a) injecting a silicon core precursor into a first chamber of a reactor; b) pyrolysing the silicon core precursor in order to form the core of the nanoparticles; c) transporting the core of the nanoparticles formed in this way in step (b) into a second chamber of the reactor communicating with the first chamber; d) injecting a carbon shell precursor into the second chamber of the reactor; e) pyrolysing the shell precursor in order to form the shell of the nanoparticles and ensure the homogeneous deposit of this shell around the core; f) collecting the nanoparticles formed in this way to obtain the nanocomposite material; wherein the quantities of silicon and carbon precursor are injected in a proportion such that the mass percentage of carbon in the nanocomposite material is greater than or equal to 45%; B) dispersing the nanocomposite material synthesised in step A) in a solvent to form an ink; C) applying this ink to a support intended to form an electricity collector; D) eliminating the solvent from the ink applied to the support in step C) to obtain the electrode; E) pressing or calendaring the electrode. A) synthesising the nanocomposite material according to the following sub-steps: a) injecting a silicon core precursor into a first chamber of a reactor; b) pyrolysing the silicon core precursor in order to form the core of the nanoparticles; c) transporting the core of the nanoparticles formed in this way in step (b) into a second chamber of the reactor communicating with the first chamber; d) injecting a carbon shell precursor into the second chamber of the reactor; e) pyrolysing the shell precursor in order to form the shell of the nanoparticles and ensure the homogeneous deposit of this shell around the core; f) collecting the nanoparticles formed in this way to obtain the nanocomposite material; wherein the quantities of silicon and carbon precursor are injected in a proportion such that the mass percentage of carbon in the nanocomposite material is greater than or equal to 45%; a) injecting a silicon core precursor into a first chamber of a reactor; b) pyrolysing the silicon core precursor in order to form the core of the nanoparticles; c) transporting the core of the nanoparticles formed in this way in step (b) into a second chamber of the reactor communicating with the first chamber; d) injecting a carbon shell precursor into the second chamber of the reactor; e) pyrolysing the shell precursor in order to form the shell of the nanoparticles and ensure the homogeneous deposit of this shell around the core; f) collecting the nanoparticles formed in this way to obtain the nanocomposite material; B) dispersing the nanocomposite material synthesised in step A) in a solvent to form an ink; C) applying this ink to a support intended to form an electricity collector; D) eliminating the solvent from the ink applied to the support in step C) to obtain the electrode; E) pressing or calendaring the electrode.