▎ 摘　　要

In this work, we report an effective approach to synthesize self-supported MnCo2O4@Co(OH)(2) core-shell heterostructures (CSHs) as the positive electrode and N-doped carbon nanotubes (N-CNTs)@reduced graphene oxide (rGO) CSHs as the negative electrode. Benefiting from the unique CSHs by wrapping urchin-like MnCo2O4 microflowers assembled from nanorods with Co(OH)(2) nanosheets, the prepared MnCo2O4@Co(OH)(2) CSHs electrode demonstrates a higher electrochemical performance (1185 C g(-1) at 1 A g(-1), 78% capacity retention at 20 A g(-1), and 96% capacity retention after 5000 cycles at 5 A g(-1)) than the pristine MnCo2O4 and Co(OH)(2) electrodes. Likewise, the prepared N-CNTs@rGO CSHs electrode also exhibits an improved capacitive performance compared to the pristine N-CNTs electrode, such as a specific capacitance of as high as 393 F g(-1) at 2 A g(-1), good capability with 71% capacitance retention at 20 A g(-1) as well as excellent cycle stability with 96% capacitance retention after 5000 cycles at 10 A g(-1). With good matching of these two electrodes in microstructures and electrochemical properties, the fabricated MnCo2O4@Co(OH)(2)//N-CNTs@rGO solid-state ASCs can deliver a high energy density of 67.2 W h kg(-1) at a power density of 800 W kg(-1) and good cycle stability with 94% capacitance retention over 5000 cycles at 10 A g(-1). This work not only provides an attractive strategy for rationally constructing high-performance CSHs electrodes materials for ASCs, but also offers an available way to develop next-generation advanced energy storage devices.