Asymmetric aqueous Zn-air battery with high voltage of 2.16 V by metal organic framework derived Co-Nx based bi-functional electrocatalyst as cathode

Wang, Lusha; Jia, Minghui; Xu, Xinxin; Wang, Qiang

doi:10.1016/j.jpowsour.2019.226892

Cited by 17 publications

(5 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In N 1s spectrum, four peaks appear at 398.2, 399.2, 400.3 and 401.4 eV, which match well with MÀ N (M=Ni/Co), pyridinic-N, pyrrolic-N and graphitic-N (Figure 3b). [59] The appearance of MÀ N also proves some N atoms have taken the places of S 2À and doped in NiCo 2 S 4 successfully. The ratio between N and S is 0.068, which implies only a few S 2À are substituted by N.…”

Section: Structure and Morphology Of N-nico 2 S 4 /Cpmentioning

confidence: 76%

Structural Modulation on NiCo₂S₄Nanoarray by N Doping to Enhance 2e‐ORR Selectivity for Photothermal AOPs and Zn−O₂Batteries**

Yin

et al. 2021

Chemistry A European J

Self Cite

View full text Add to dashboard Cite

As a H2O2 generator, a 2e− oxygen reduction reaction active electrocatalyst plays an important role in the advanced oxidation process to degrade organic pollutants in sewage. To enhance the tendency of NiCo2S4 towards the 2e− reduction reaction, N atoms are doped in its structure and replace S2−. The result implies that this weakens the interaction between NiCo2S4 and OOH*, suppresses O−O bond breaking and enhances H2O2 selectivity. This electrocatalyst also shows photothermal effect. Under photothermal heating, H2O2 produced by the oxidation reduction reaction can decompose and releaseOH, which degrades organic pollutants through the advanced oxidation process. Photothermal effect induced by the advance oxidation process shows obvious advantages over the traditional Fenton reaction, such as wide pH adaptation scope and low secondary pollutant due to its Fe2+ free character. With Zn as anode and the electrocatalyst as cathode material, a Zn−O2 battery is assembled. It achieves electricity generation and photothermal effect induced by the advance oxidation process simultaneously.

show abstract

Section: Structure and Morphology Of N-nico 2 S 4 /Cpmentioning

confidence: 76%

Structural Modulation on NiCo₂S₄Nanoarray by N Doping to Enhance 2e‐ORR Selectivity for Photothermal AOPs and Zn−O₂Batteries**

Yin

et al. 2021

Chemistry A European J

Self Cite

View full text Add to dashboard Cite

show abstract

“…Recently, the voltage of liquid-state ZABs was successfully elevated to over 2 V by decoupling the liquid electrolyte into acid catholyte and alkaline anolyte, separated by a bipolar membrane for preventing neutralization [12,13]. This way, the Zn anode can retain stability in alkaline, and the air cathode in acid exhibits a higher potential [14,15]. The following reactions explained for the voltage promotion: Anode in alkaline anolyte: Zn + 4OH -= Zn(OH)4 2-+ 2e -E θ = -1.199 V vs SHE Cathode in alkaline catholyte: O2(g) + 2H2O + 4e -= 4OH -E θ = 0.401 V vs SHE Cathode in acid catholyte: O2(g) + 4H + + 4e -= 2H2O E θ = 1.229 V vs SHE For conventional flexible sandwich-structure ZABs (Figure 1a), the self-standing hydrogel electrolyte is employed to replace the liquid-state alkaline electrolyte to achieve battery flexibility [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

All-in-one and bipolar-membrane-free acid-alkaline hydrogel electrolytes for flexible high-voltage Zn-air batteries

Zhao

Liu

Dai

et al. 2022

Chemical Engineering Journal

View full text Add to dashboard Cite

“…For example, a Co-N x /Co-NMC bifunctional catalyst has been developed that can accelerate OER with a current density of 10 mA cm À 2 at 1.56 V and ORR with a half-wave potential of 0.82 V, showing a chargedischarge voltage from 1.8 to 2.8 V at a current density of 20 mA cm À 2 . [52] More recently, Wang and co-workers reported ORR/OER bifunctional electrocatalysts of N-doped carboncoated Co nanoparticles embedded in highly porous nanocubes (NC@Co-PNC) by calcination of polydopamine modified-Co/Zn zeolitic imidazolate frameworks (Figure 8g). [53] The introduction of Zn can not only promote the homo-dispersion of Co particles but also increase the porosity of the materials.…”

Section: Zn-air Batteriesmentioning

confidence: 99%

Aqueous OH⁻/H⁺ Dual‐Ion Zn‐Based Batteries

Cai

Chen

et al. 2022

ChemSusChem

View full text Add to dashboard Cite

Aqueous Zn‐based batteries hold multiple advantages of eco‐friendliness, easy accessibility, high safety, easy fabrication, and fast kinetics, while their widespread applications have been greatly limited by the relatively narrow thermodynamically stable potential windows (i. e., 1.23 V) of water and the mismatched pH conditions between cathode and anode, which presents challenges regarding how to maximize the output voltage and the energy density. Recently, aqueous OH−/H+ dual‐ion Zn‐based batteries (OH−/H+‐DIZBs), where the Zn anode reacts with hydroxide ions (OH−) in alkaline electrolyte while hydrogen ions (H+) are involved in the cathode reaction in the acidic electrolyte, have been reported to be capable of broadening the working voltage and improving the energy density, which offers practical feasibility toward overcoming the above limitations. This Review thus takes this chance to investigate the recent progress on aqueous OH−/H+‐DIZBs. First, the concept and the history of such OH−/H+‐DIZBs are introduced, and then special emphasis is put on the working mechanisms, the progress of the development of new batteries, and how the electrolytes improve their performance. Finally, the challenges and opportunities in this field are discussed.

show abstract

Asymmetric aqueous Zn-air battery with high voltage of 2.16 V by metal organic framework derived Co-Nx based bi-functional electrocatalyst as cathode

Cited by 17 publications

References 52 publications

Structural Modulation on NiCo₂S₄Nanoarray by N Doping to Enhance 2e‐ORR Selectivity for Photothermal AOPs and Zn−O₂Batteries**

Structural Modulation on NiCo₂S₄Nanoarray by N Doping to Enhance 2e‐ORR Selectivity for Photothermal AOPs and Zn−O₂Batteries**

All-in-one and bipolar-membrane-free acid-alkaline hydrogel electrolytes for flexible high-voltage Zn-air batteries

Aqueous OH⁻/H⁺ Dual‐Ion Zn‐Based Batteries

Contact Info

Product

Resources

About

Asymmetric aqueous Zn-air battery with high voltage of 2.16 V by metal organic framework derived Co-Nx based bi-functional electrocatalyst as cathode

Cited by 17 publications

References 52 publications

Structural Modulation on NiCo2S4Nanoarray by N Doping to Enhance 2e‐ORR Selectivity for Photothermal AOPs and Zn−O2Batteries**

Structural Modulation on NiCo2S4Nanoarray by N Doping to Enhance 2e‐ORR Selectivity for Photothermal AOPs and Zn−O2Batteries**

All-in-one and bipolar-membrane-free acid-alkaline hydrogel electrolytes for flexible high-voltage Zn-air batteries

Aqueous OH−/H+ Dual‐Ion Zn‐Based Batteries

Contact Info

Product

Resources

About

Asymmetric aqueous Zn-air battery with high voltage of 2.16 V by metal organic framework derived Co-Nx based bi-functional electrocatalyst as cathode

Structural Modulation on NiCo₂S₄Nanoarray by N Doping to Enhance 2e‐ORR Selectivity for Photothermal AOPs and Zn−O₂Batteries**

Structural Modulation on NiCo₂S₄Nanoarray by N Doping to Enhance 2e‐ORR Selectivity for Photothermal AOPs and Zn−O₂Batteries**

Aqueous OH⁻/H⁺ Dual‐Ion Zn‐Based Batteries