A post-synthesis surface reconstructed carbon aerogel as an enhanced oxygen reduction reaction catalyst for zinc–air batteries

Pang, Yanhua; Mo, Zunli; Wang, Hui; Linkov, Vladimir; Wang, Xuyun; Wang, Rongfang

doi:10.1039/d0cy01130d

Cited by 9 publications

(8 citation statements)

References 39 publications

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“…In a typical example, 1.5 g of peptone and 15 g of NaCl (NaCl is a molten salt that can act as a pore former. Our previous work has been reported …”

Section: Methodsmentioning

confidence: 94%

“…CG materials were prepared according to the procedure developed by us previously. 34 In a typical example, 1.5 g of peptone and 15 g of NaCl (NaCl is a molten salt that can act as a pore former. Our previous work has been reported.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

“…Our previous work has been reported. 34 ) were mixed and milled in a zirconia ball mill at 6000 rpm for 6 h. The mixture was placed in a ceramic crucible inside a tubular furnace, which was heated to 900 °C at a heating rate of 2.5 °C min −1 in a nitrogen atmosphere and kept there for 60 min. Subsequently, the furnace was cooled down to 30 °C at a cooling rate of 5 °C min −1 , and the product was washed with deionized water several times and dried in a vacuum oven at 80 °C for 12 h to obtain the CG material.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

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Manganese-Assisted Annealing Produces Abundant Macropores in a Carbon Aerogel to Enhance Its Oxygen Reduction Catalytic Activity in Zinc–Air Batteries

Pang

Wang

et al. 2021

ACS Sustainable Chem. Eng.

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Carbon aerogels have large specific surface areas suitable for the formation of large numbers of exposed catalytically active sites for oxygen reduction reaction (ORR). In this study, as-prepared carbon aerogels undergo a manganese-assisted annealing process, resulting in a 754 m 2 g −1 specific surface area, abundant macropores, and a fourfold increase in the surface nitrogen content. An optimized Mn−N codoped carbon aerogel, with a 1:10 mass ratio of MnCl 2 •4H 2 O to carbon, annealed at 800 °C, exhibited excellent ORR catalytic activity in a three-electrode system, reaching an onset potential of 0.988 V, slightly higher than 0.975 V of commercial Pt/C (20 wt %, Johnson Matthey). A primary zinc−air battery utilizing this non-noble metal-containing material as an ORR cathode catalyst, operating at a current density of 100 mA cm −2 , demonstrated an open-circuit voltage, output voltage, and power density of 1.467 V, 1.124 V, and 112.38 mW cm −2 , respectively, 11 mV, 97 mV, and 9.75 mW cm −2 higher than those values of a Pt/C-containing zinc−air battery. Excellent ORR performance of the Mn−N codoped carbon aerogel could be resulting from the synergistic effect of abundant macropores, highdensity nitrogen-based catalytically active sites, and a certain amount of MnO catalytically active sites.

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“…In a typical example, 1.5 g of peptone and 15 g of NaCl (NaCl is a molten salt that can act as a pore former. Our previous work has been reported …”

Section: Methodsmentioning

confidence: 94%

Section: ■ Experimental Sectionmentioning

confidence: 99%

Section: ■ Experimental Sectionmentioning

confidence: 99%

See 1 more Smart Citation

Manganese-Assisted Annealing Produces Abundant Macropores in a Carbon Aerogel to Enhance Its Oxygen Reduction Catalytic Activity in Zinc–Air Batteries

Pang

Wang

et al. 2021

ACS Sustainable Chem. Eng.

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“…For comparison, a Fe 3 O 4 /PNC material was also prepared by the method reported earlier, 42 where 100 mg of PNC and 50 mg of Fe(NO 3 ) 3 •9H 2 O were added into a round-bottomed flask containing 20 mL of deionized water and ultrasonicated for 60 min. The obtained solution was frozen by liquid nitrogen and freeze-dried.…”

Section: Experimental Methodsmentioning

confidence: 99%

Synergistic Effect between Monodisperse Fe₃O₄ Nanoparticles and Nitrogen-Doped Carbon Nanosheets to Promote Polysulfide Conversion in Lithium–Sulfur Batteries

et al. 2022

ACS Appl. Mater. Interfaces

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Effective fabrication of electrocatalysts active in anchoring and converting lithium polysulfides is critical for the manufacturing of high-performance lithium–sulfur batteries (LSBs). In this study, original Fe3O4 nanospheres with diameters close to 12 nm were finely dispersed over a porous nitrogen-doped carbon matrix by the freeze-drying method to produce a three-dimensional composite material (nano-Fe3O4/PNC) suitable for application as a sulfur host in LSBs. Nano-Fe3O4/PNC loaded with sulfur (S@nano-Fe3O4/PNC) was used as a cathode in a Li–S cell, whose initial discharge specific capacity reached 1256 mA h g–1 at a 0.1 C rate. After 100 charge–discharge cycles at a 0.2 C rate, the reversible capacity of S@nano-Fe3O4/PNC remained at 745 mA h g–1, demonstrating a capacity retention rate of 70%. Importantly, a high Coulombic efficiency of more than 99% was achieved, indicating effective inhibition of the polysulfides’ “shuttle effect” by nano-Fe3O4/PNC. The use of electrolytes containing lithium nitrate further reduces the “shuttle effect” of polysulfides. This study demonstrates the synergistic effect between metal oxide nanoparticles and N-doped carbon, which plays an important role in promoting the adsorption and conversion of polysulfides in LSBs.

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“…Meanwhile, it is widely accepted that carbon aerogel (CA) is one of the best support materials for the loading of active sites because of its interconnected porosity, high surface area, excellent mass transfer properties, and high electrical conductivity. [ 29,36,37 ] In this context, Fe–Ni ANCs supported by CA (Fe–Ni ANC@CA) may achieve stable OER activity while maintaining its ORR activity as a bifunctional electrocatalysts for both ORR and OER of ZABs.…”

Section: Introductionmentioning

confidence: 99%

Fe–Ni Alloy Nanoclusters Anchored on Carbon Aerogels as High‐Efficiency Oxygen Electrocatalysts in Rechargeable Zn–Air Batteries

Shu

Tong

et al. 2021

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In this work, Fe–Ni alloy nanoclusters (Fe–Ni ANCs) anchored on N, S co‐doped carbon aerogel (Fe–Ni ANC@NSCA catalysts) are successfully prepared by the optimal pyrolysis of polyaniline (PANI) aerogels derived from the freeze‐drying of PANI hydrogel obtained by the polymerization of aniline monomers in the co‐presence of tannic acid (TA), Fe3+, and Ni2+ ions. In addition, the optimal molar ratio of the TA, Fe3+, and Ni2+ ions for synthesis of Fe–Ni ANC@NSCA catalysts are 1:2:5, which can guarantee the formation of carbon aerogel composed of quasi‐2D porous carbon sheets and the formation of high‐density Fe–Ni ANCs with an ultrasmall size between 2 to 2.8 nm. These Fe–Ni ANCs consisting of N4–Fe–O–Ni–N4 moiety are proposed as a new type of active species for the first time, to the best of the authors’ knowledge. Thanks to their unique features, the Fe–Ni ANC@NSCA catalysts show excellent performance in oxygen reduction reaction with a half‐wave potential (E1/2) of 0.891 V and oxygen evolution reaction (260 mV @ 10 mA cm−2) in alkaline media as bifunctional catalysts, which are better than the state‐of‐the‐art commercial Pt/C catalysts and RuO2 catalysts. Moreover, Zn–air battery assembled with the Fe–Ni ANC@NSCA catalysts also shows a remarkable performance and exceptionally high stability over 500 h at 5 mA cm−2.

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A post-synthesis surface reconstructed carbon aerogel as an enhanced oxygen reduction reaction catalyst for zinc–air batteries

Abstract:
Being a most promising alternative to platinum-based catalysts for oxygen reduction reaction, nitrogen-doped carbon materials have been extensively investigated to improve their electro-catalytic activity. In this work, a facile process...

Cited by 9 publications

References 39 publications

Manganese-Assisted Annealing Produces Abundant Macropores in a Carbon Aerogel to Enhance Its Oxygen Reduction Catalytic Activity in Zinc–Air Batteries

Manganese-Assisted Annealing Produces Abundant Macropores in a Carbon Aerogel to Enhance Its Oxygen Reduction Catalytic Activity in Zinc–Air Batteries

Synergistic Effect between Monodisperse Fe₃O₄ Nanoparticles and Nitrogen-Doped Carbon Nanosheets to Promote Polysulfide Conversion in Lithium–Sulfur Batteries

Fe–Ni Alloy Nanoclusters Anchored on Carbon Aerogels as High‐Efficiency Oxygen Electrocatalysts in Rechargeable Zn–Air Batteries

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A post-synthesis surface reconstructed carbon aerogel as an enhanced oxygen reduction reaction catalyst for zinc–air batteries

Abstract: Being a most promising alternative to platinum-based catalysts for oxygen reduction reaction, nitrogen-doped carbon materials have been extensively investigated to improve their electro-catalytic activity. In this work, a facile process...

Cited by 9 publications

References 39 publications

Manganese-Assisted Annealing Produces Abundant Macropores in a Carbon Aerogel to Enhance Its Oxygen Reduction Catalytic Activity in Zinc–Air Batteries

Manganese-Assisted Annealing Produces Abundant Macropores in a Carbon Aerogel to Enhance Its Oxygen Reduction Catalytic Activity in Zinc–Air Batteries

Synergistic Effect between Monodisperse Fe3O4 Nanoparticles and Nitrogen-Doped Carbon Nanosheets to Promote Polysulfide Conversion in Lithium–Sulfur Batteries

Fe–Ni Alloy Nanoclusters Anchored on Carbon Aerogels as High‐Efficiency Oxygen Electrocatalysts in Rechargeable Zn–Air Batteries

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About

Abstract:
Being a most promising alternative to platinum-based catalysts for oxygen reduction reaction, nitrogen-doped carbon materials have been extensively investigated to improve their electro-catalytic activity. In this work, a facile process...

Synergistic Effect between Monodisperse Fe₃O₄ Nanoparticles and Nitrogen-Doped Carbon Nanosheets to Promote Polysulfide Conversion in Lithium–Sulfur Batteries