Amorphous C,N Codoping Cobalt Phosphates Simply Fabricated via a Mild Host–Guest Strategy as Bifunctional Electrocatalysts for Zinc–Air Batteries

Guo, Zheng-Han; Yue, Cuiyu; Ou, Kai-Qin; Wu, Li Chiu; Lv, Qiuyu; Lin, Jie-Ying; Chen, Pei-Ru; Liu, Jiehua; Huang, Sai; Li, Jin‐Kun; Song, Jun‐Ling

doi:10.1002/ente.202100940

Cited by 5 publications

(1 citation statement)

References 66 publications

(59 reference statements)

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“…It is suggested that MWNT/PBI/NiFeS-xh has crystal/amorphous hybrid structures, and the amorphous structures would play an important role in their high ORR activities. The importance of amorphous structures in the catalysts for the ORR, OER, HER, and water splitting performances has already been reported in many journals. − …”

Section: Resultsmentioning

confidence: 97%

Simple Method to Enhance the Oxidation–Reduction Reaction Activity of a Carbon Nanotube-Based Nickel–Iron Layered Double Hydroxide as a Bifunctional Electrocatalyst

Nishida,

Kobayashi,

Sugiyama

et al. 2023

J. Phys. Chem. C

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The development of an electrocatalyst with high bifunctional oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) performances using non-preciousmetal/metal oxides is highly important as a future energy material. NiFe-layered double hydroxides (LDH) are well-known catalysts that have high OER activity, while their ORR activity is low. We here present a method to enhance the ORR of NiFe-LDH. We first synthesized a polybenzimidazole (PBI)-coated multiwalled carbon nanotube (MWNT)-based NiFe-LDH catalyst (MWNT/PBI-NiFe-LDH), then by sulfurization of the LDH, sulfur-doped catalysts, MWNT/PBI/NiFeS-xh (x is sulfurization time) were synthesized, which were characterized by TEM, STEM, EDX, thermogravimetry, X-ray diffraction analysis, XPS, and near-edge X-ray absorption fine structure spectroscopy (NEXAFS). After sulfurization, the nanoplate structure of MWNT/PBI-NiFe-LDH changed to nanoparticles that were composed of Ni−Fe−S composites. The valency of Ni and Fe is suggested to be +2 and +3, respectively. MWNT/PBI/NiFeS-xh provided a higher ORR (E 1/2 = 0.80 V vs RHE) than that (E 1/2 = 0.70 V vs RHE) of MWNT/PBI-NiFe-LDH with no sulfurization, while the sulfurization did not change their OER activities. This study provides an efficient and simple method for enhancing ORR of LDH catalysts, and the method is useful for designing a non-precious-metal-based ORR/OER bifunctional catalyst with high performance.

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Section: Resultsmentioning

confidence: 97%

Simple Method to Enhance the Oxidation–Reduction Reaction Activity of a Carbon Nanotube-Based Nickel–Iron Layered Double Hydroxide as a Bifunctional Electrocatalyst

Nishida,

Kobayashi,

Sugiyama

et al. 2023

J. Phys. Chem. C

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Hydrogen‐Rich Pyrolysis from Ni‐Fe Heterometallic Schiff Base Centrosymmetric Cluster Facilitates NiFe Alloy for Efficient OER Electrocatalysts

Zhou

Gan

Yan

et al. 2023

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Binary metal nickel‐iron alloys have been proven to have great potential in oxygen evolution reaction (OER) electrocatalysis, but there are still certain challenges in how to construct more efficient nickel‐iron alloy electrocatalysts and maximize their own advantages. In this work, a heterometallic nickel‐iron cluster (L = C64H66Fe4N8Ni2O19) of Schiff base (LH3 = 2‐amino‐1,3‐propanediol salicylaldehyde) is designed as a precursor to explore its behavior in the pyrolysis process under inert atmosphere. The combination of TG‐MS, morphology, and X‐ray characterization techniques shows that the Schiff base ligands in the heterometallic clusters produces a strong reductive atmosphere during pyrolysis, which enable the two 3d metals Ni and Fe to form NiFe alloys. Moreover, Fe2O3/Fe0.64Ni0.36@Cs carbon nanomaterials are formed, in which Fe2O3/Fe0.64Ni0.36 is the potential active material for OER. It is also found that the centrosymmetric structure of the heterometallic Schiff base precursor is potentially related to the formation of the Fe2O3/Fe0.64Ni0.36 alloy@carbon structures. The Fe2O3/Fe0.64Ni0.36@C‐800 provides 274 mV overpotential in 1 m KOH solution at 10 mA cm−2 in OER. This work provides an effective basis for further research on Schiff base bimetallic doping‐derived carbon nanomaterials as excellent OER electrocatalysts.

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Amorphous Materials for Lithium‐Ion and Post‐Lithium‐Ion Batteries

Ding,

Ji,

Yue

et al. 2023

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Lithium‐ion and post‐lithium‐ion batteries are important components for building sustainable energy systems. They usually consist of a cathode, an anode, an electrolyte, and a separator. Recently, the use of solid‐state materials as electrolytes has received extensive attention. The solid‐state electrolyte materials (as well as the electrode materials) have traditionally been overwhelmingly crystalline materials, but amorphous (disordered) materials are gradually emerging as important alternatives because they can increase the number of ion storage sites and diffusion channels, enhance solid‐state ion diffusion, tolerate more severe volume changes, and improve reaction activity. To develop superior amorphous battery materials, researchers have conducted a variety of experiments and theoretical simulations. This review highlights the recent advances in using amorphous materials (AMs) for fabricating lithium‐ion and post‐lithium‐ion batteries, focusing on the correlation between material structure and properties (e.g., electrochemical, mechanical, chemical, and thermal ones). We review both the conventional and the emerging characterization methods for analyzing AMs and present the roles of disorder in influencing the performances of various batteries such as those based on lithium, sodium, potassium, and zinc. Finally, we describe the challenges and perspectives for commercializing rechargeable AMs‐based batteries.

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Amorphous C,N Codoping Cobalt Phosphates Simply Fabricated via a Mild Host–Guest Strategy as Bifunctional Electrocatalysts for Zinc–Air Batteries

Cited by 5 publications

References 66 publications

Simple Method to Enhance the Oxidation–Reduction Reaction Activity of a Carbon Nanotube-Based Nickel–Iron Layered Double Hydroxide as a Bifunctional Electrocatalyst

Simple Method to Enhance the Oxidation–Reduction Reaction Activity of a Carbon Nanotube-Based Nickel–Iron Layered Double Hydroxide as a Bifunctional Electrocatalyst

Hydrogen‐Rich Pyrolysis from Ni‐Fe Heterometallic Schiff Base Centrosymmetric Cluster Facilitates NiFe Alloy for Efficient OER Electrocatalysts

Amorphous Materials for Lithium‐Ion and Post‐Lithium‐Ion Batteries

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