| 摘要 |
An electrode for a lithium ion rechargeable battery cell is provided, the battery comprising current collectors (10, 12), a cathode layer (16), a separator and a cohesive anode mass (14), the cohesive mass comprising silicon as an active material and a polymeric binder, characterized in that the polymeric binder is a homo- polymer or copolymer of one or more monomers selected from the group consisting of acrylic acid, 3-butenoic acid, 2-methacrylic acid, 2-pentenoic acid, 2,3- dimethylacrylic acid, 3,3-dimethylacrylic acid, trans-butenedioc acid, cis- butenedioc acid and itaconic acid and optionally an alkali metal salt thereof. The silicon comprises 20 to 100% of the active material in the cohesive mass. The binder is mixed with the silicon to form the cohesive mass that adheres to the current collector and maintains said cohesive mass in electrical contact with the current collector (12). |
