A high-energy-density, high-cycling-life Si-based anode is used for rechargeable Lithium-ion batteries with either solid-state electrolyte or currently commercialized liquid electrolyte. The Si-based anodes include a silicon-based active material, conductive agent(s), and polymer(s) that act as binder(s). The silicon-based active material includes silicon, graphite, metallic or non-metallic oxide, and/or a polymer. The electrode has a specific capacity of at least 2328 mAh/g when cycled at a charge-discharge rate of about 0.5 C and 3245 mAh/g at 0.05 C. Sheets of the Si-based electrode are processable with a well-established industrial process that is cost-effective, scalable, and compatible with currently used Li-ion production lines. A lithium electrochemical pouch cell is manufactured with the Si-based anode sheet with either a liquid electrolyte or a solid-state electrolyte to offer high energy density, long cycle life, and high charge/discharge rates.