The synergistically enhanced activity and stability of layered manganese oxide <i>via</i> the engineering of defects and K<sup>+</sup> ions for oxygen electrocatalysis

Zhou, Zihao; Zheng, Xiaoying; Huang, Hongyun; Wu, Yanli; Han, Shengbo; Cai, Wei-Xiong; Lan, Bang; Sun, Ming; Yu, Lin

doi:10.1039/d2ce00124a

Cited by 4 publications

(2 citation statements)

References 56 publications

(64 reference statements)

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“…While some Mn oxides were proposed to be sufficiently stable, [89,135,136] other Mn oxides, to which the layered oxides usually belong, suffer from insufficient stability. [50,[137][138][139] The lack in stability is often inferred from electrochemical data alone, this was found to be insufficient.…”

Section: Sample Parametermentioning

confidence: 99%

Stabilization of a Mn−Co Oxide During Oxygen Evolution in Alkaline Media

et al. 2022

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Improving the stability of electrocatalysts for the oxygen evolution reaction (OER) through materials design has received less attention than improving their catalytic activity. We explored the effects of Mn addition to a cobalt oxide for stabilizing the catalyst by comparing single phase CoO x and (Co 0.7 Mn 0.3 )O x films electrodeposited in alkaline solution. The obtained disordered films were classified as layered oxides using X-ray absorption spectroscopy (XAS). The CoO x films showed a constant decrease in the catalytic activity during cycling, confirmed by oxygen detection, while that of (Co 0.7 Mn 0.3 )O x remained constant within error as measured by electrochemical metrics. These trends were rationalized based on XAS analysis of the metal oxidation states, which were Co 2.7 + and Mn 3.7 + in the bulk and similar near the surface of (Co 0.7 Mn 0.3 )O x , before and after cycling. Thus, Mn in (Co 0.7 Mn 0.3 )O x successfully stabilized the bulk catalyst material and its surface activity during OER cycling. The development of stabilization approaches is essential to extend the durability of OER catalysts.

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Section: Sample Parametermentioning

confidence: 99%

Stabilization of a Mn−Co Oxide During Oxygen Evolution in Alkaline Media

et al. 2022

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“…Among these efforts, researchers have shown that surface coating remains as an effective and facile route. They have developed different inorganic and polymeric coatings via wet chemistry vapor-phase processes showing superior performance on NMC811 [30][31][32]. In the past decade, atomic layer deposition (ALD) has emerged as a unique vapor-phase technique enabling high-quality conformal and uniform films over either electrode powders or prefabricated electrodes [33,34].…”

Section: Introductionmentioning

confidence: 99%

Effects of cathode loadings and anode protection on the performance of lithium metal batteries

Carballo,

Wang,

Benamara

et al. 2023

Nanotechnology

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While lithium-ion batteries (LIBs) are approaching their energy limits, lithium metal batteries (LMBs) are undergoing intensive investigation for higher energy density. Coupling LiNi0.8Mn0.1Co0.1O2 (NMC811) cathode with lithium (Li) metal anode, the resultant Li||NMC811 LMBs are among the most promising technologies for future transportation electrification, which have the potential to realize an energy density two times higher than that of state-of-the-art LIBs. To maximize their energy density, the Li||NMC811 LMBs are preferred to have their cathode loading as high as possible while their Li anode as thin as possible. To this end, we investigated the effects of different cathode active material loadings (2 – 14 mg/cm2) on the performance of the Li||NMC811 LMBs. Our study revealed that the cathode loadings have remarkably affected the cell performance, in terms of capacity retention and sustainable capacity. Cells with high cathode loadings are more liable to fade in capacity, due to severer formation of the CEI and more sluggish ion transport. In this study, we also verified that the protection of the Li anode is significant for achieving better cell performance. In this regard, our newly developed Li-containing glycerol (LiGL) via molecular layer deposition (MLD) is promising to help boost the cell performance, which was controllably deposited on the Li anode.

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Heterostructure engineering of NiCo layered double hydroxide@NiCo2S4 for solid-state rechargeable zinc-air batteries

Lin

Zhou

Peng

et al. 2023

Electrochimica Acta

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The synergistically enhanced activity and stability of layered manganese oxide via the engineering of defects and K⁺ ions for oxygen electrocatalysis

Abstract: Structural defects and interlayered ions are two classic architectures that regulate the electrochemical activity of layered manganese oxides. However, the synergistic effect of defects and interlayered ions and how it...

Cited by 4 publications

References 56 publications

Stabilization of a Mn−Co Oxide During Oxygen Evolution in Alkaline Media

Stabilization of a Mn−Co Oxide During Oxygen Evolution in Alkaline Media

Effects of cathode loadings and anode protection on the performance of lithium metal batteries

Heterostructure engineering of NiCo layered double hydroxide@NiCo2S4 for solid-state rechargeable zinc-air batteries

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The synergistically enhanced activity and stability of layered manganese oxide via the engineering of defects and K+ ions for oxygen electrocatalysis

Abstract: Structural defects and interlayered ions are two classic architectures that regulate the electrochemical activity of layered manganese oxides. However, the synergistic effect of defects and interlayered ions and how it...

Cited by 4 publications

References 56 publications

Stabilization of a Mn−Co Oxide During Oxygen Evolution in Alkaline Media

Stabilization of a Mn−Co Oxide During Oxygen Evolution in Alkaline Media

Effects of cathode loadings and anode protection on the performance of lithium metal batteries

Heterostructure engineering of NiCo layered double hydroxide@NiCo2S4 for solid-state rechargeable zinc-air batteries

Contact Info

Product

Resources

About

The synergistically enhanced activity and stability of layered manganese oxide via the engineering of defects and K⁺ ions for oxygen electrocatalysis