Lattice Strain‐Modulated Trifunctional CoMoO 4 Polymorph‐Based Electrodes for Asymmetric Supercapacitors and Self‐Powered Water Splitting

Abstract Developing efficient, multifunctional electrodes for energy storage and conversion devices is crucial. Herein, lattice strains are reported in the β‐phase polymorph of CoMoO 4 within CoMoO 4 @Co 3 O 4 heterostructure via phosphorus doping (P‐CoMoO 4 @Co 3 O 4 ) and used as a high‐performance trifunctional electrode for supercapacitors (SCs), hydrogen evolution reaction (HER), and oxygen evolution reaction (OER) in alkaline electrolytes. A tensile strain of +2.42% on the β‐phase of CoMoO 4 in P‐CoMoO 4 @Co 3 O 4 results in superior electrochemical performance compared to CoMoO 4 @Co 3 O 4 . The optimized P‐CoMoO 4 @Co 3 O 4 achieves a high energy density of 118 Wh kg −1 in an asymmetric supercapacitor…

• CP
  China Postdoctoral Science Foundation

  Award: 2024M750858