![]() This work provides a new strategy for fabricating long-life and high-capacity lithium batteries.Įnergy storage devices with high energy density, good safety, and excellent stability are necessary and urgent for the development of next-generation battery technologies. The S||Bi/Cu-Li full cell delivers a specific capacity of 736 mAh g −1 after 200 cycles. The half cells run stably after more than 120 cycles under high capacity of 4 mAh cm −2. ![]() With the as-obtained ultrathin alloys as anodes, excellent cycling performance is achieved. ![]() Meanwhile, the high surface work function can effectively alleviate side reactions between the electrolyte and lithium. It is discovered that the electronic localization can induce self-smoothing effect of Li ions, as a result, significantly suppressing the growth of dendritic lithium. Herein, fabricating Li-based ultrathin alloys with electronic localization and high surface work function via depositing Bi, Al, or Au metals on the surface of copper foil for in situ alloying with lithium is proposed. However, lithium dendrite growth has impeded its commercial application. Lithium metal is an ideal anode for next-generation high-energy-density batteries.
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