NiCo-doped C-N nano-composites for cathodic catalysts of Zn-air batteries in neutral media

Deng, Zhongliang; Yi, Qingfeng; Li, Guang; Chen, Yao; Yang, Xiaokun; Nie, Huarong

doi:10.1016/j.electacta.2018.05.069

Cited by 80 publications

(47 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3a shows the weak and broad characteristic diffraction peak centered at ca. 26.5°is corresponding to the (002) plane of graphite carbon, which is consistent with HRTEM results, demonstrating the existence of several graphitic layers in the as-prepared catalysts [36]. When C-N is doped with Ni and Co, three distinctive peaks located at 44.32°, 51.62°and 76.10°c ould be seen for Ni 1 Co 1 @ht-CN, Ni 2 Co 3 @ht-CN and Ni 3 Co 2 @ht-CN catalysts.…”

Section: Preparation Of Ni X Co Y @Ht-cn Electrocatalystssupporting

confidence: 89%

An easy synthesis of Ni-Co doped hollow C-N tubular nanocomposites as excellent cathodic catalysts of alkaline and neutral zinc-air batteries

Yang

et al. 2019

Sci. China Mater.

Self Cite

View full text Add to dashboard Cite

Exploring high-activity electrocatalyst for oxygen reduction reaction (ORR) is of great significance for a variety of renewable energy conversion and storage technologies. Herein, we fabricated novel ORR electrocatalysts derived from Ni-Co nanoparticles encapsulated in hollow tubular C-N composites (ht-CN) through an easy and scalable pyrolysis route utilizing nickel acetate and cobalt acetate as metal precursors, 2-cyanoguanidine as the nitrogen source, and sucrose as the carbon source. Among the prepared nanocomposite catalysts with different molar ratios of Ni/Co, the catalyst Ni 2 Co 3 @ht-CN exhibits an outstanding ORR electroactivity comparable to Pt/C catalyst both in alkaline and neutral media. Home-made zinc-air battery with the Ni 2 Co 3 @ht-CN as cathode electrocatalyst presents excellent performance and superior durability either in neutral or alkaline medium. The Ni 2 Co 3 @ht-CN battery delivers an open circuit voltage of 1.08 V and a maximum power density of 47 mW cm −2 in 0.5 mol L −1 KNO 3 solution, while 1.51 V and 314 mW cm −2 in 6 mol L −1 KOH solution. In addition, whether in neutral or alkaline solution, the constant current discharge curves of the Ni 2 Co 3 @ht-CN battery at different current densities exhibit higher voltage plateau and stability than the Pt/C battery. Results demonstrate the potential application of the catalysts of the present investigation to Zn-air batteries both in alkaline and neutral media.

show abstract

Section: Preparation Of Ni X Co Y @Ht-cn Electrocatalystssupporting

confidence: 89%

An easy synthesis of Ni-Co doped hollow C-N tubular nanocomposites as excellent cathodic catalysts of alkaline and neutral zinc-air batteries

Yang

et al. 2019

Sci. China Mater.

Self Cite

View full text Add to dashboard Cite

show abstract

“…[10] In this work, the pyridinic-N (N1) and graphitic-N (N4) could be favourable for ORR activity on all the catalysts materials according to the literature (Table 2). [10,18,25,70] The transition metal coordinated to nitrogen (MeÀ N x ) sites are considered to be the most active centres for ORR electrocatalysis. [16,71] The catalytic mechanism of the ORR on MeÀ N x centres has been quite thoroughly studied in the acidic environment.…”

Section: Aemfc Testingmentioning

confidence: 99%

Electrospun Polyacrylonitrile‐Derived Co or Fe Containing Nanofibre Catalysts for Oxygen Reduction Reaction at the Alkaline Membrane Fuel Cell Cathode

et al. 2020

View full text Add to dashboard Cite

Electrospun polyacrylonitrile (PAN) based carbon nanofibres (CNF) are employed as cathode catalysts in anion-exchange membrane fuel cell (AEMFC) for the first time. The catalysts are prepared via pyrolysis of Co or Fe salt-containing PAN fibre with and without the ionic liquid (IL) additive. The catalyst material preparation is optimised by assessing the oxygen reduction reaction (ORR) activity of different transition metal and nitrogen-doped CNFs in 0.1 M KOH by rotating disc electrode method followed by testing in real AEMFC configuration. The best performance in the AEMFC is observed in case of Fe and IL containing PAN fibre that was pyrolysed at 1000°C and additionally treated in an acid solution (Fe/IL-PAN-A1000). In the AEMFC, the Fe/IL-PAN-A1000 catalyst showed the maximum power density (P max) of 289 mW cm À 2 , which is 82 % of the P max obtained with commercial Pt/C cathode catalyst (352 mW cm À 2).

show abstract

“…The discharge and power‐density curves of Fe/N‐HCNFs and Pt/C were depicted in Figure b. The open‐circuit voltage of Zn‐air cell with Fe/N‐HCNFs was 1.37 V. Notably, Fe/N‐HCNFs delivered a higher power density of 50 mW cm −2 at the current density of 75.5 mA cm −2 than that of Pt/C (47 mW cm −2 , 82 mA cm −2 ), which resulted from hierarchically porous structure offering fast electron/ion transport and adequate active sites . Furthermore, the battery with Fe/N‐HCNFs exhibited high durability up to 260 long‐term cycle testing at 20 mA cm −2 without significant decay(Figure6c).…”

Section: Resultsmentioning

confidence: 99%

Hierarchical Porous N‐doped Carbon Nanofibers Supported Fe₃C/Fe Nanoparticles as Efficient Oxygen Electrocatalysts for Zn−Air Batteries

Zhao

et al. 2019

ChemistrySelect

View full text Add to dashboard Cite

Non‐precious metal nanocomposite has attracted extensive attention as an effective catalyst for both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). Herein, hierarchically porous N‐doped carbon nanofibers supported Fe3C/Fe nanoparticles (denoted as Fe/N‐HCNFs) have been successfully fabricated. The synthesis involved the successive steps of electrospun polyacrylonitrile (PAN) and zeolitic imidazolate framework (ZIF‐8) nanofiber, surface functionalization of tannic acid (TA), coordination with ferric salt and carbonization. The obtained Fe/N‐HCNFs exhibited enhanced electrocatalytic performance for both ORR and OER. Furthermore, Fe/N‐HCNFs delivered a higher power density and an excellent long‐term stability when applied in a constructed Zn‐air battery, which illustrated its outstanding prospects for energy storage and conversion.

show abstract

NiCo-doped C-N nano-composites for cathodic catalysts of Zn-air batteries in neutral media

Cited by 80 publications

References 48 publications

An easy synthesis of Ni-Co doped hollow C-N tubular nanocomposites as excellent cathodic catalysts of alkaline and neutral zinc-air batteries

An easy synthesis of Ni-Co doped hollow C-N tubular nanocomposites as excellent cathodic catalysts of alkaline and neutral zinc-air batteries

Electrospun Polyacrylonitrile‐Derived Co or Fe Containing Nanofibre Catalysts for Oxygen Reduction Reaction at the Alkaline Membrane Fuel Cell Cathode

Hierarchical Porous N‐doped Carbon Nanofibers Supported Fe₃C/Fe Nanoparticles as Efficient Oxygen Electrocatalysts for Zn−Air Batteries

Contact Info

Product

Resources

About

NiCo-doped C-N nano-composites for cathodic catalysts of Zn-air batteries in neutral media

Cited by 80 publications

References 48 publications

An easy synthesis of Ni-Co doped hollow C-N tubular nanocomposites as excellent cathodic catalysts of alkaline and neutral zinc-air batteries

An easy synthesis of Ni-Co doped hollow C-N tubular nanocomposites as excellent cathodic catalysts of alkaline and neutral zinc-air batteries

Electrospun Polyacrylonitrile‐Derived Co or Fe Containing Nanofibre Catalysts for Oxygen Reduction Reaction at the Alkaline Membrane Fuel Cell Cathode

Hierarchical Porous N‐doped Carbon Nanofibers Supported Fe3C/Fe Nanoparticles as Efficient Oxygen Electrocatalysts for Zn−Air Batteries

Contact Info

Product

Resources

About

Hierarchical Porous N‐doped Carbon Nanofibers Supported Fe₃C/Fe Nanoparticles as Efficient Oxygen Electrocatalysts for Zn−Air Batteries