Enhancing bifunctional electrodes of oxygen vacancy abundant ZnCo2O4 nanosheets for supercapacitor and oxygen evolution

Xiang, Kun; Wu, Dan; Fan, Yun; Yan, Wen; Zhang, Dongdong; Luo, Jing‐Li; Fu, Xian‐Zhu

doi:10.1016/j.cej.2021.130583

Cited by 96 publications

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References 63 publications

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“…Xiang et al [ 28 ] calculated the projected DOS of pristine ZnCo 2 O 4 and oxygen‐deficient ZnCo 2 O 4 , as shown in Figure a. Pristine ZnCo 2 O 4 displays typical semiconductor behavior with a bandgap of 1.2 eV.…”

Section: Theoretical Investigationmentioning

confidence: 99%

Section: Regulating Surface Active Sitesmentioning

confidence: 99%

“…Figure 4. a) Projected DOS of pristine ZnCo 2 O 4 and oxygen-deficient ZnCo 2 O 4 .Reproduced with permission [28]. Copyright 2019, Elsevier B.V. b) Partial DOS of β-MnO 2(110) with various contents of OVs.…”

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confidence: 99%

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Oxygen‐Deficient Metal Oxides for Supercapacitive Energy Storage: From Theoretical Calculation to Structural Regulation and Utilization

Wan

Wang

et al. 2022

Adv Energy and Sustain Res

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Supercapacitors (SCs) have attracted considerable research interest because of their complementary role to dominated lithium-ion batteries (LIBs) for powering the electrified society. [1] In contrast to the bulk-involved reactions for energy storage in LIBs, SCs mainly store charges in the electric double layers (EDLs) via electrostatic adsorption where highly porous and conductive materials, for example, activated carbons, are needed. [2] This storage mechanism allows SCs to exhibit excellent rate capability, long cyclic life, and high safety; therefore, it is indispensable in many fields. [3] However, despite these advantages, the limited charge storage space within electrode materials considerably restricts the energy density of SCs. To overcome this limitation, tremendous efforts have been devoted to the search for electrode materials that employ alternative charge-storage mechanisms that can improve energy storage. [4] Some metal oxides (MOs) can afford extremely fast surface redox reactions which compare favorably with those of electrostatic charge adsorption at the EDLs. Although these processes are faradaic in nature, they show an excellent rate capability that is similar to that of the EDL charge storage in the porous carbon electrodes of current SCs. Then, these MOs are defined as pseudocapacitive materials, and they can improve the energy density of current SCs. [5] The theoretical capacitance of the MO-based electrodes can be calculated using Equation (1) [6] Cwhere n, F, M, and V represent the number of transferred electrons, Faraday constant (C mol À1 ), the molar mass of the MOs (g mol À1 ), and operating voltage window (V), respectively. The specific capacitance of the typical MO electrode materials is summarized in Table 1.The MOs should have suitable electronic structures, desired electrical conductivity, and sufficient active sites to facilitate surface redox reactions. To this end, tremendous progress has been realized via research efforts in recent decades. [7] Heteroatomdoping has been widely used to engineer electronic structures. [8] Zeng et al. [9] synthesized a Ti-doped Fe 2 O 3 @poly

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Section: Theoretical Investigationmentioning

confidence: 99%

Section: Regulating Surface Active Sitesmentioning

confidence: 99%

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Oxygen‐Deficient Metal Oxides for Supercapacitive Energy Storage: From Theoretical Calculation to Structural Regulation and Utilization

Wan

Wang

et al. 2022

Adv Energy and Sustain Res

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“…17 Xiang et al found that vacancy abundant ZnCo 2 O 4 possessed remarkable OER activity with a low overpotential of 324 mV at 10 mA cm −2 . 18 Amirzhanova et al prepared mesoporous ZnCo 2 O 4 , MnCo 2 O 4 , NiCo 2 O 4 for OER. 19 Soon thereafter, the NiCo-LDH/ZnCo 2 O 4 heterostructure could boost electronic synergism on OER.…”

Section: Introductionmentioning

confidence: 99%

Heterostructured ZnCo₂O₄–CoOOH nanosheets on Ni foam for a high performance bifunctional alkaline water splitting catalyst

et al. 2022

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“…8 In particular, the bimetallic transition metal oxide ZnCo 2 O 4 (ZCO) has been conceived as a promising electrode candidate in HSCs due to its low cost, environmentally benign nature, and rich redox reactions. 9,10 Despite these attractive features, the real specific capacity obtained from ZCO is far from satisfactory due to its large volume change and low conductivity during the rapid charging/discharging process. 11,12 To overcome these challenges, great efforts have been devoted to ingeniously designing various nanostructured ZCO materials 13,14 and ZCO-based composites with conductive carbonaceous substrates.…”

Section: Introductionmentioning

confidence: 99%

Vertically aligned ZnCo₂O₄ nanoplates on Ti₃C₂ for high-efficiency hybrid supercapacitors

Wang

Guo

et al. 2022

New J. Chem.

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Enhancing bifunctional electrodes of oxygen vacancy abundant ZnCo2O4 nanosheets for supercapacitor and oxygen evolution

Cited by 96 publications

References 63 publications

Oxygen‐Deficient Metal Oxides for Supercapacitive Energy Storage: From Theoretical Calculation to Structural Regulation and Utilization

Oxygen‐Deficient Metal Oxides for Supercapacitive Energy Storage: From Theoretical Calculation to Structural Regulation and Utilization

Heterostructured ZnCo₂O₄–CoOOH nanosheets on Ni foam for a high performance bifunctional alkaline water splitting catalyst

Vertically aligned ZnCo₂O₄ nanoplates on Ti₃C₂ for high-efficiency hybrid supercapacitors

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Enhancing bifunctional electrodes of oxygen vacancy abundant ZnCo2O4 nanosheets for supercapacitor and oxygen evolution

Cited by 96 publications

References 63 publications

Oxygen‐Deficient Metal Oxides for Supercapacitive Energy Storage: From Theoretical Calculation to Structural Regulation and Utilization

Oxygen‐Deficient Metal Oxides for Supercapacitive Energy Storage: From Theoretical Calculation to Structural Regulation and Utilization

Heterostructured ZnCo2O4–CoOOH nanosheets on Ni foam for a high performance bifunctional alkaline water splitting catalyst

Vertically aligned ZnCo2O4 nanoplates on Ti3C2 for high-efficiency hybrid supercapacitors

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Heterostructured ZnCo₂O₄–CoOOH nanosheets on Ni foam for a high performance bifunctional alkaline water splitting catalyst

Vertically aligned ZnCo₂O₄ nanoplates on Ti₃C₂ for high-efficiency hybrid supercapacitors