Perovskite oxides La0.4Sr0.6CoxMn1-xO3 (x = 0, 0.2, 0.4) as an effective electrocatalyst for lithium—air batteries

Zhao, Yajun; Liu, Tao; Shi, Qiufan; Yang, Qingchun; Li, Chunxiao; Zhang, Dawei; Zhang, Chaofeng

doi:10.1016/j.gee.2017.12.001

Cited by 21 publications

(17 citation statements)

References 34 publications

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“…Thus, the results suggest that the air cathode should have a large number of pores and high surface area catalysts, which may enhance the oxygen and Li + ion diffusion property that facilitates the high-performance battery lifespan. Therefore, as compared to previous reports [23][24][25][26][27] demonstrating the perovskite oxide catalyst prepared by citric acid and urea as fuel or a chelating agent, the present synthesis method with glycine can increase the surface area due to the presence of a large volume of mesopores and the integration of conductive GNS as a support, which can further improve the electrocatalytic properties of the perovskite materials.…”

Section: Li-o 2 Battery Performancementioning

confidence: 69%

“…However, the bifunctional ORR and OER properties of LaMnO 3 can be tuned by the partial substitution of La and Mn sites with alkaline earth or rare-earth and transition-metal cations, respectively. Therefore, metal-ion-doped LaMnO 3 perovskites have received enormous attention in Li-air or Li-O 2 battery applications as cathode materials to replace the conventional Pt or Pt/C catalysts [23][24][25][26][27]. The discharge and recharge overpotentials of these LaMnO 3 -based cathodes are significantly reduced as compared to commercial carbon and Pt/C catalysts [28].…”

Section: Introductionmentioning

confidence: 99%

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Graphene Nanosheet-Wrapped Mesoporous La0.8Ce0.2Fe0.5Mn0.5O3 Perovskite Oxide Composite for Improved Oxygen Reaction Electro-Kinetics and Li-O2 Battery Application

et al. 2021

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A novel design and synthesis methodology is the most important consideration in the development of a superior electrocatalyst for improving the kinetics of oxygen electrode reactions, such as the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER) in Li-O2 battery application. Herein, we demonstrate a glycine-assisted hydrothermal and probe sonication method for the synthesis of a mesoporous spherical La0.8Ce0.2Fe0.5Mn0.5O3 perovskite particle and embedded graphene nanosheet (LCFM(8255)-gly/GNS) composite and evaluate its bifunctional ORR/OER kinetics in Li-O2 battery application. The physicochemical characterization confirms that the as-formed LCFM(8255)-gly perovskite catalyst has a highly crystalline structure and mesoporous morphology with a large specific surface area. The LCFM(8255)-gly/GNS composite hybrid structure exhibits an improved onset potential and high current density toward ORR/OER in both aqueous and non-aqueous electrolytes. The LCFM(8255)-gly/GNS composite cathode (ca. 8475 mAh g−1) delivers a higher discharge capacity than the La0.5Ce0.5Fe0.5Mn0.5O3-gly/GNS cathode (ca. 5796 mAh g−1) in a Li-O2 battery at a current density of 100 mA g−1. Our results revealed that the composite’s high electrochemical activity comes from the synergism of highly abundant oxygen vacancies and redox-active sites due to the Ce and Fe dopant in LaMnO3 and the excellent charge transfer characteristics of the graphene materials. The as-developed cathode catalyst performed appreciable cycle stability up to 55 cycles at a limited capacity of 1000 mAh g−1 based on conventional glass fiber separators.

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Section: Li-o 2 Battery Performancementioning

confidence: 69%

Section: Introductionmentioning

confidence: 99%

Graphene Nanosheet-Wrapped Mesoporous La0.8Ce0.2Fe0.5Mn0.5O3 Perovskite Oxide Composite for Improved Oxygen Reaction Electro-Kinetics and Li-O2 Battery Application

et al. 2021

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“…The XRD patterns of LaxSr1-xCoO3 are shown in Figure 18. According to the data in the article of Yajun Zhao et al (2018), compared the peaks in Figure 18 with the standard PDF card, they conform the cubic perovskite structure. Also, there is no other obvious phases and impurities detected in the patterns except the two peaks aside the highest peak.…”

Section: Xrd For Laxsr1-xcoo3mentioning

confidence: 93%

“…The average grain size of samples can be calculated through Scherrer equation ("XRD Crystallite Size Calculator (Scherrer Equation)," 2019) using the (110) peak (second peak from the left in Figure 18) data (Zhao et al, 2018). The processes of getting the data as follows:…”

Section: Xrd For Laxsr1-xcoo3mentioning

confidence: 99%

“…It can be seen from the area ration of Co 2+ and Co 3+ , La0.5Sr0.5CoO3 has the largest content of Co 2+ . Zhang et al have conducted the density functional theory calculations, which improved that Co 2+ defects have lower formation energy than Co 3+ defects (R. Zhang et al, 2018). That is to say, most of the cobalt vacancies are Co 2+ defects and Co 2+ contributes to forming oxygen vacancies.…”

Section: Xps For Laxsr1-xcoo3mentioning

confidence: 99%

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UQ eSpace

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Climate change, especially global warming, which caused by increased concentrations of greenhouse gases in the atmosphere, has become more severe nowadays. When we burn fossil fuels, like coal, oil and natural gas, to create power, we release carbon dioxide pollution into the atmosphere. Worse still, according to the International Energy Outlook report in 2018, the consumption of fossil fuels is expected to keep growing in the following decades with the increasing of the world population. To solve this problem, reducing the amount of electricity generated from fossil fuels and increasing the amount of power from renewable energy sources like wind and solar energy are becoming the trend. These renewables are intermittent and difficult to store in a large scale. Thus, techniques which can store renewables in a large-scale and produce less environmental pollution are required. Electrochemical water splitting has become one of the most promising technologies in recent years because it can produce hydrogen gas as pollution-free fuel from solar energy and other renewables. However, there is a hindrance for electrochemical water splitting system which is the sluggish oxygen evolution reaction. Researches have been carried out to synthesize catalysts for accelerating the reaction. In this project, lanthanum, strontium, cobalt and cerium based perovskite electrocatalysts were synthesized based on the previous study. To investigate and compare their catalytic performance, characterization tests and electrochemical tests were performed. In the end, we found that La0.5Sr0.5CoO3 has the best catalytic performance among six samples and further study is well worth doing to increase the ratio of cerium.

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A dual‐doping strategy of LaCoO ₃ for optimized oxygen evolution reaction toward zinc‐air batteries application

Hilal

Şanlı

Dekyvere

et al. 2022

Intl J of Energy Research

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Summary Perovskite‐based electrocatalysts are extensively investigated as a replacement for noble metals electrocatalysts for energy storage and conversion devices. Their interesting catalytic activity, low cost, and diversity are considered major advantages. In this work, a facile dual‐doping strategy has been conducted and yielded an astonishing upgrade of lanthanum cobaltite; fine‐tuning of both A and B sites with calcium and manganese has proven remarkably beneficial. The dual‐doping modulates the electronic configuration of both transition metals and raises the oxygen vacancies. Consequently, oxygen evolution reaction has been assessed and La0.8Ca0.2Mn0.2Co0.8O3 showed significantly improved overpotential and maximal current density in comparison with pristine LaCoO3. Furthermore, the ZAB exhibited a high open circuit potential and superior charge‐discharge cyclability, compared to Pt/C‐based electrodes. The current work explores the influence of simultaneous doping of the A and B sites in lanthanum perovskite oxides on electrocatalytic performance to encourage further exploration of such an approach in electrocatalysis. Novelty statement Simultaneous Ca and Mn dual‐doping of LaCoO3 in the A and B sites were successfully applied. The effects on the crystal structure, oxidation states, and electrocatalytic activity were studied. LCMC8228‐based ZAB has achieved a large discharge capacity of 88.1 mAh in comparison to the benchmark.

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Perovskite oxides La0.4Sr0.6CoxMn1-xO3 (x = 0, 0.2, 0.4) as an effective electrocatalyst for lithium—air batteries

Cited by 21 publications

References 34 publications

Graphene Nanosheet-Wrapped Mesoporous La0.8Ce0.2Fe0.5Mn0.5O3 Perovskite Oxide Composite for Improved Oxygen Reaction Electro-Kinetics and Li-O2 Battery Application

Graphene Nanosheet-Wrapped Mesoporous La0.8Ce0.2Fe0.5Mn0.5O3 Perovskite Oxide Composite for Improved Oxygen Reaction Electro-Kinetics and Li-O2 Battery Application

UQ eSpace

A dual‐doping strategy of LaCoO ₃ for optimized oxygen evolution reaction toward zinc‐air batteries application

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Perovskite oxides La0.4Sr0.6CoxMn1-xO3 (x = 0, 0.2, 0.4) as an effective electrocatalyst for lithium—air batteries

Cited by 21 publications

References 34 publications

Graphene Nanosheet-Wrapped Mesoporous La0.8Ce0.2Fe0.5Mn0.5O3 Perovskite Oxide Composite for Improved Oxygen Reaction Electro-Kinetics and Li-O2 Battery Application

Graphene Nanosheet-Wrapped Mesoporous La0.8Ce0.2Fe0.5Mn0.5O3 Perovskite Oxide Composite for Improved Oxygen Reaction Electro-Kinetics and Li-O2 Battery Application

UQ eSpace

A dual‐doping strategy of LaCoO 3 for optimized oxygen evolution reaction toward zinc‐air batteries application

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A dual‐doping strategy of LaCoO ₃ for optimized oxygen evolution reaction toward zinc‐air batteries application