Hydrothermal Synthesized of CoMoO4 Microspheres as Excellent Electrode Material for Supercapacitor

Abstract

The single-phase CoMoO4 was prepared via a facile hydrothermal method coupled with calcination treatment at 400 °C. The structures, morphologies, and electrochemical properties of samples with different hydrothermal reaction times were investigated. The microsphere structure, which consisted of nanoflakes, was observed in samples. The specific capacitances at 1 A g−1 are 151, 182, 243, 384, and 186 F g−1 for samples with the hydrothermal times of 1, 4, 8, 12, and 24 h, respectively. In addition, the sample with the hydrothermal time of 12 h shows a good rate capability, and there is 45% retention of initial capacitance when the current density increases from 1 to 8 A g−1. The high retain capacitances of samples show the fine long-cycle stability after 1000 charge-discharge cycles at current density of 8 A g−1. The results indicate that CoMoO4 samples could be a choice of excellent electrode materials for supercapacitor.

Design of NiO Flakes@CoMoO4 Nanosheets Core-Shell Architecture on Ni Foam for High-Performance Supercapacitors

“…As illustrated in Fig. 5f, the synthesized 2D branched of NiO flakes@CoMoO 4 NSs/NF composite provides beneficial kinetics conditions in terms of effective ions transport channels, short ion diffusion distance, fast charge transfer rate, and plentiful redox active sites, resulting in excellent capacitive performance [30].…”

Facile Synthesis of Novel V0.13Mo0.87O2.935 Nanowires With High-Rate Supercapacitive Performance

“…SCs are becoming more appealing than ever because of their rapid recharge capabilities, high power density, and durable life cycles (Salanne et al, 2016; Du et al, 2018; Kirubasankar et al, 2018; Ho and Lin, 2019; Le et al, 2019; Ma et al, 2019; Yang L. et al, 2019). It is well-established that three main electrode materials include conducting polymer, transition metal oxide, and carbon materials (Jabeen et al, 2016a,b; Chen et al, 2017; Li et al, 2018; Idrees et al, 2019). In this regard, transition metal oxides can increase the efficiency and improve the specific capacitances compared to conducting polymers and carbon materials (Yang et al, 2015; Fu et al, 2016; Qin et al, 2016a,b; Meng et al, 2017; An and Cheng, 2018).…”

“…In the last few years, binary metal oxides with stoichiometric or even nonstoichiometric composition such as NiCo 2 O 4 (Ma et al, 2016), NiFe 2 O 4 (Yu et al, 2014), and MnCo 2 O 4.5 (Hu et al, 2019) have achieved efficient energy storage. It stems from its defect–effect mechanisms (Ellis et al, 2007; Wang et al, 2017) or possible jump processes (Hu et al, 2012; Li et al, 2018; Yang Y. et al, 2019) that provided the needed efficient electron conductivity. Also, the electrochemical behavior of these binary metal oxides is different to simple metal oxides attributed to their composition, including the species and ratios of elements.…”

Boosting the energy storage performance of cobalt molybdate microspheres constructed from urotropin‐induced ultrathin nanosheets

“…Recently, some CoMoO 4 materials with unique structures have been prepared to improve the supercapacitor performance. For example, CoMoO 4 nanosheets prepared by hydrothermal methods exhibit 21 mAh/g at 1 mA/cm 2 ; CoMoO 4 nanowires obtained by combining a “directional attachment” technique possess the excellent electrochemical performance of 0.7 F/cm 2 at 2 mA/cm 2 ; CoMoO 4 nanorods synthesized by microwave methods own 53 mAh/g at 1 A/g; globular CoMoO 4 possess a specific capacitance of 384 F/g at 1 A/g . Encouraged by this fact, interconnected CoMoO 4 nanosheets can boost supercapacitor performance owing to the porous structure, high‐surface area, and rapid charge transfer.…”