Hierarchical MoO3‐MnNi LDH@Cu(OH)2 Core‐Shell Nanorod Arrays Constructed through In‐Situ Oxidation Combined with a Hydrothermal Strategy for High‐Performance Energy Storage.

The synthesis of layered nanorod arrays with a core‐shell structure is considered to be a viable strategy to improve the electrochemical property of electrode materials. Herein, we have successfully designed and fabricated layered MoO3‐MnNi LDH@Cu(OH)2/CF(MO‐MN LDH@COH) core‐shell nanorods through a handy in‐situ oxidation reaction followed by a hydrothermal synthesis, which consist of ordered Cu(OH)2 nanorods and ultra‐thin MoO3‐MnNi LDHs nanosheets. The MO‐MN LDH@COH which is utilized as the cathode in three electrodes exhibits superior electrochemical property. The specific capacity of prepared electrode is 16913 mF cm−2 under a current density of 2 mA cm−2, which is superior to its counterparts of COH, MN LDH@COH‐0, MO‐MN LDH@COH‐0.5 and MO‐MN LDH@COH‐2. What's more, the cycling stability reaches 83.33 % capacitance retention after 5000 cycles under the current density of 30 mA cm−2. When a solid‐state asymmetric supercapacitor (ASC) device (MO‐MN LDH@COH//AC) is fabricated, it could keep a household LED screen running for 27 minutes, verifying the immense commercial potential. Overall, this unique MO‐MN LDH@COH nanocomposite with excellent electrochemical performance should envision great practical application potential. [ABSTRACT FROM AUTHOR]