Revealing the electrochemical mechanism of the conversion-type Co3S4 in a novel high-capacity Mg-Li hybrid battery

A dendrite-less Mg anode is coupled with an insertion-type cathode to construct a Mg-Li hybrid ion battery competitive to the state of art Li-ion batteries. However, the issue of limited energy density restricts the practical application of Mg-Li hybrid battery. Herein, it is the first time to assemble an ultrahigh-capacity Mg-Li hybrid battery with spinel Co3S4 cathode and Mg anode. The particle-like Co3S4-F delivers the initial high discharge...