Dual Hybrid Energy Storage Device With A Battery-Electrochemical Capacitor Hybrid Cathode And A Battery-Type Anode

The design of appropriate material architectures and a judicious combination of storage modes are expected to deliver electrical energy storage devices of larger specific energy (E-S) and specific power (P-S). Herein, a battery-electrochemical capacitor hybrid material as a cathode [i.e., porous carbon filled with three-dimensional MnCo2O4 nanoflowers (3DMCNF), 3DMCNF-AC] and a corresponding battery component (3DMCNF) as an anode are used in a dual hybrid device using a 1 M LiPF6 electrolyte. The cathodic and the anodic properties of the electrodes are separately studied in the half-cell configuration with respect to the Li/Li+ electrode. The 3DMCNF-AC hybrid cathode showed larger specific capacitance (similar to 165 F.g(-1)) in the potential range (similar to 2 to 4.5 V vs Li/Li+) than that of a pure porous carbon cathode (similar to 115 F.g(-1), similar to 2 to 4 V vs Li/Li+) at 100 mA.g(-1) cycling. The half-cell 3DMCNF anode showed a discharge capacity of similar to 1020 mA.h.g(-1) in the potential range of similar to 0.01-3.0 V versus Li/Li+ at a similar cycling condition to that of the cathode. The dual hybrid full device delivered similar to 3.5 V with an ES of up to similar to 153 W.h.kg(-1) and a PS of up to similar to 3500 W. kg(-1).