Synergistic effect in XMoO4 (X: Ni, Zn) nanorods derived from 2D molybdenum-based metal-organic frameworks boosting supercapacitive performance

We present a novel approach for synthesizing XMoO4 (X: Ni, Zn) using metal-organic frameworks as templates. Our findings reveal orthorhombic structure of MoO3 converted to triclinic and monoclinic crystalline phases for ZnMoO(4 )and NiMoO4, respectively. XMoO4 nanorods have higher band gap than MoO3, with an optical band gap range of 3.20-3.80 eV. The specific surface area was estimated to be 27.6, 44.7 and 63.6 m(2) g(-1) for MoO3, ZnMoO4, and NiMoO4, respectively. Electrochemical results demonstrated that Ni2+ and Zn2+ incorporation improved the supercapacitive performance of MoO3 and MOF-derived NiMoO4 nanorods disclosed superior specific capacitance of 2302.5 F g(-1 )at 1 A g-1 with cycling stability of 93% after 5000 cycles. A maximum energy density of 66.4 Wh kg(-1) at 749.3 W kg(-1) was achieved for NiMoO4//AC ASC. The research established that NiMoO4 nanorods have considerable potential for supercapacitor devices.