Hybrid Mg2+/Li+ Battery with Long Cycle Life and High Rate Capability.

A rechargeable hybrid Mg2+/Li+ battery is designed by coupling a dendrite‐free magnesium anode with an electrolyte‐compatible cathode in a mixed Mg2+/Li+ electrolyte. Due to the highly reversible lithiation/delithiation of the cathode and Mg deposition/dissolution in the electrolyte, the battery demonstrates the best overall performance among reported magnesium‐ion batteries and mixed‐ion batteries in terms of cycling stability, specific capacity, specific energy, and rate capability. [ABSTRACT FROM AUTHOR]