Abstract

The invention relates to a negative electrode – anode for a rechargeable Li-ion battery which contains a conductive metal foil Cu, as a current collector, covered with a composite of a 50% to 80% porosity, where the composite contains an active material, 5% to 15% by weight of binder, and 5% to 15% by weight of conductive powder, where the % by weight of binder and conductive powder are based on the weight of the active material and where the active material contains 5 to 95% by weight of graphite and 95% to 5% by weight of silicon; and where the composite is provided with a surface ZnO layer of a thickness of 0.5 to 5 nm. The invention also relates to a method of manufacturing such an electrode and a battery containing said negative electrode.

IPC Classes  ?

• H01M 4/04 - Processes of manufacture in general
• H01M 4/13 - Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulatorsProcesses of manufacture thereof
• H01M 4/139 - Processes of manufacture
• H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries
• H01M 10/0568 - Liquid materials characterised by the solutes
• H01M 10/0569 - Liquid materials characterised by the solvents

Abstract

A method for electrochemical surface treatment of biomedical product made of titanium or Ti-based alloys wherein it comprises steps: Immersion of the degreased and cleaned biomedical product into the electrolyte consisting from mixture of 95 to 60 vol. % of Ethaline and 5 to 40 vol. % of ethyl alcohol, respectively; galvanostatic etching treatment of the biomedical product at the current density 2 to 20 mA cm-2 for 2 to 60 min. at a temperature 5 to 40 °C or potentiostatic etching treatment of the biomedical product at the potential 1 to 4 V for 2 to 60 min. at a temperature 5 to 40 °C; or galvanostatic electropolishing of the biomedical product at the current density 25 to 100 mA cm-2 for 2 to 60 min. at a temperature 5 to 40 °C or potentiostatic electropolishing of the biomedical product at the potential 5 to 30 V for 2 to 60 min. at a temperature 5 to 40 °C; and subsequent cleaning of the biomedical product from electrolytes residuals.

IPC Classes  ?

• C25F 3/08 - Etching of refractory metals
• C25F 3/26 - Polishing of heavy metals of refractory metals

Abstract

The invention relates to the method for electrochemical surface treatment of biomedical product made of titanium or Ti-based alloys characterized in that it comprises the steps: Immersion of the degreased and cleaned biomedical product into the electrolyte consisting of Reline or Glyceline; galvanostatic etching treatment of the biomedical product at the current density 1 to 20 mA cm-2for 5 to 60 min. at a temperature 15 to 40 °C or potentiostatic etching treatment of the biomedical product at the potential 1 to 5 V for 5 to 60 min. at a temperature 15 to 40 °C; or galvanostatic electropolishing of the biomedical product at the current density 25 to 100 mA cm-2 for 5 to 60 min. at a temperature 15 to 40 °C or potentiostatic electropolishing of the biomedical product at the potential 6 to 30 V for 5 to 60 min. at a temperature 15 to 40 °C; and subsequent cleaning of the biomedical product from electrolytes residuals.

IPC Classes  ?

• C25F 3/08 - Etching of refractory metals
• C25F 3/26 - Polishing of heavy metals of refractory metals