Role of oxygen vacancies on the energy storage performance of battery-type NiO electrodes

Silva, Thayse R.; Silva, Vinícius D.; Ferreira, Luciena S.; Araújo, Allan J.M.; Morales, Marco A.; Simões, Thiago A.; Paskocimas, C. A.; Macedo, Daniel A.

doi:10.1016/j.ceramint.2019.12.176

Cited by 35 publications

(14 citation statements)

References 39 publications

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“…Except for the above EDLC-and PC-based electrode materials, the third type of electrode materials (battery-type) that are based on some transition metal oxides (TMOs) and phosphides have been drawing increasing attention for their higher energy and power densities, faster charging ability, and more stable cycling performance. 11,12 The electrode material is the most crucial component of a capacitor device, and a lot of studies have been directed to the high-performance TMO-based electrode materials including NiO, 13,14 Fe 3 O 4 , 15 and Co 3 O 4 . 16 Among them, Co 3 O 4 has been extensively explored in recent decades because of its high theoretical capacitance (3560 F/g), superior chemical stability, and outstanding cycling durability up to 10 5 cycles.…”

Section: Introductionmentioning

confidence: 99%

“…The electrode material is the most crucial component of a capacitor device, and a lot of studies have been directed to the high-performance TMO-based electrode materials including NiO, , Fe 3 O 4 , and Co 3 O 4 . Among them, Co 3 O 4 has been extensively explored in recent decades because of its high theoretical capacitance (3560 F/g), superior chemical stability, and outstanding cycling durability up to 10 5 cycles. , While its intrinsically poor electric conductivity (10 –3 to 10 –4 S cm –1 ) decreases rate capability and limits its further applications in energy storage .…”

Section: Introductionmentioning

confidence: 99%

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Simple Preparation of Porous FeCo₂O₄ Microspheres and Nanosheets for Advanced Asymmetric Supercapacitors

Sun

et al. 2020

ACS Appl. Energy Mater.

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Transition metal oxides (TMOs) can serve as advanced electrode materials and have attracted extensive attention in the past decade. Herein, porous FeCo 2 O 4 microspheres (FeCo 2 O 4 MSs) and FeCo 2 O 4 nanosheets (FeCo 2 O 4 NSs) have been successfully synthesized in different solvent systems, accompanied by a corresponding annealing treatment of precursors. The FeCo 2 O 4MSs and NSs possessed a mesoporous structure, and the BET surface areas reached 40.9 and 38.5 m 2 g −1 , respectively. The electrochemical studies were performed in a KOH aqueous electrolyte, and such FeCo 2 O 4 MSs delivered 231.5 C g −1 at 1 A g −1 and exhibited a good long-term cycling performance during 5000 cycles with 71.3% capacity retention. In contrast, the FeCo 2 O 4 NSs delivered a higher capacity of 339.0 C g −1 at 1 A g −1 and exhibited a better rate capability with 73% capacity retention at 13 A g −1 . Furthermore, the assembled FeCo 2 O 4 NSs//AC ASC could preserve 100.5% specific capacity after 5000 cycles and exhibited a high energy density of 37.1 W h kg −1 at 928.0 W kg −1 , while the FeCo 2 O 4 MSs//AC ASC possessed a relatively low energy density with 26.2 W h kg −1 at 965.5 W kg −1 . The outstanding electrochemical behavior of FeCo 2 O 4 NSs and MSs makes them promising electrode materials in electrochemical storage devices. Additionally, this current synthetic strategy possesses some advantages such as simple handling, low maintenance cost, and environmental friendliness; thus, it can be employed for synthesizing other TMOs with superior electrochemical properties.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Simple Preparation of Porous FeCo₂O₄ Microspheres and Nanosheets for Advanced Asymmetric Supercapacitors

Sun

et al. 2020

ACS Appl. Energy Mater.

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“…This is because the EPR test collects signal from the bulk structure, while XPS mainly characterizes the chemical states on the surface. 37 Combining the above XPS analysis, it is concluded that excessive NiO deposition decreases the oxygen adsorption capacity of In 2 O 3 /NiO materials.…”

Section: Resultsmentioning

confidence: 86%

“…15 The relative content of O S can be regulated by oxygen vacancies. 37,47 In 2 O 3 /NiO-20 showed an O S /O L ratio of 3.41, against 2.00 for In 2 O 3 , which showed a fact that growth regulation of low-concentration Ni led to a high oxygen vacancy ratio. 48 3.2.…”

Section: Resultsmentioning

confidence: 94%

“…It is noticed that In 2 O 3 /NiO-40 with highest concentration of oxygen vacancies in EPR spectra does not have the most relative amount of O S in XPS. This is because the EPR test collects signal from the bulk structure, while XPS mainly characterizes the chemical states on the surface . Combining the above XPS analysis, it is concluded that excessive NiO deposition decreases the oxygen adsorption capacity of In 2 O 3 /NiO materials.…”

Section: Resultsmentioning

confidence: 95%

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Chemical and Electronic Modulation via Atomic Layer Deposition of NiO on Porous In₂O₃ Films to Boost NO₂ Detection

Xie

Liu

Jing

et al. 2021

ACS Appl. Mater. Interfaces

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To achieve high sensitivity under low-temperature operation is currently a challenge for metal oxide semiconductor gas sensors. In this work, a unique NiO-functionalized macroporous In 2 O 3 thin film is designed by atomic layer deposition (ALD), which demonstrates great potential in electronic sensors for detecting NO 2 at low temperature. This strategy allows for efficient engineering of the oxygen vacancy concentration and the formation of p−n heterojunctions in the hybrid In 2 O 3 /NiO thin films, which has been found to greatly impact the surface chemical and electrical properties of the sensing films. The sensor based on the optimized In 2 O 3 /NiO films exhibits a very high response of 532.2 to 10 ppm NO 2 , which is 26 times higher than that of the In 2 O 3 , at a relatively low operating temperature of 145 °C. In addition, an ultralow detection limit of ca. 6.9 ppb has been obtained, which surpasses most reports based on metal oxide sensors. Mechanistic investigations disclose that the improved sensor properties are resultant from the paramount surface active sites and high carrier concentration enabled by the oxygen vacancies, while excessive NiO ALD leads to a decreased sensor response due to the formed p−n heterojunctions.

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Effect of synthesis routes on electrochemical properties as supercapacitor electrode for novel spinel (CuNiFeMnCo)₃O₄ high entropy oxide

Gupta,

Singh,

Kumari

et al. 2023

Energy Storage

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The aim of the present study is to investigate the effect of synthesis routes on phase evolution, microstructure, change in ionic state and their co‐relation with electrochemical charge storage, and magnetic properties of novel (CuNiFeMnCo)3O4 high entropy spinel oxide (HESO). We successfully synthesized novel (CuNiFeMnCo)3O4 HESO through two different synthesis methods, that is, sol‐gel and reverse coprecipitation methods abbreviated as SA‐1 and SA‐2, respectively. The XRD analysis for both samples reveals the formation of inverse spinel phase (space group Fd‐3m) with the lattice constant of 8.3602 and 8.2502 Å for SA‐1 and SA‐2, respectively. The sample synthesized through the sol‐gel method possessed porous morphology, whereas the sample synthesized through the reverse coprecipitation method had spherical particles. The x‐ray photoelectron spectroscopy confirmed the presence of +2 and +3 ionic states for Fe, Ni, and Co, while Cu has a + 2 state and Mn exist in +3 and +4 states for both the synthesized samples. The ionic states of all cations remain invariant irrespective of the synthesis methods. However, the concentration of oxygen vacancy is significantly different for samples synthesized through different routes. Both the HESO electrodes show the electrochemical double‐layer capacitive type behavior in 2 M KOH electrolytic solution. The value of maximum specific capacitance is 38.46 and 34.24 F/g at a scan rate of 5 mV/s for SA‐1 and SA‐2, respectively. Moreover, the electrodes have capacity retention of 90 and 99% for 1000 cycles at a scan rate of 50 mV/s for SA‐1 and SA‐2, respectively. The magnetic property of the synthesized HESO samples was also investigated, and the found values of magnetization and coercivity are 1.79 emu/g and 54.9 Oe and 8.5 emu/g and 67.69 Oe for SA‐1 and SA‐2, respectively.

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Role of oxygen vacancies on the energy storage performance of battery-type NiO electrodes

Cited by 35 publications

References 39 publications

Simple Preparation of Porous FeCo₂O₄ Microspheres and Nanosheets for Advanced Asymmetric Supercapacitors

Simple Preparation of Porous FeCo₂O₄ Microspheres and Nanosheets for Advanced Asymmetric Supercapacitors

Chemical and Electronic Modulation via Atomic Layer Deposition of NiO on Porous In₂O₃ Films to Boost NO₂ Detection

Effect of synthesis routes on electrochemical properties as supercapacitor electrode for novel spinel (CuNiFeMnCo)₃O₄ high entropy oxide

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Role of oxygen vacancies on the energy storage performance of battery-type NiO electrodes

Cited by 35 publications

References 39 publications

Simple Preparation of Porous FeCo2O4 Microspheres and Nanosheets for Advanced Asymmetric Supercapacitors

Simple Preparation of Porous FeCo2O4 Microspheres and Nanosheets for Advanced Asymmetric Supercapacitors

Chemical and Electronic Modulation via Atomic Layer Deposition of NiO on Porous In2O3 Films to Boost NO2 Detection

Effect of synthesis routes on electrochemical properties as supercapacitor electrode for novel spinel (CuNiFeMnCo)3O4 high entropy oxide

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Resources

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Simple Preparation of Porous FeCo₂O₄ Microspheres and Nanosheets for Advanced Asymmetric Supercapacitors

Simple Preparation of Porous FeCo₂O₄ Microspheres and Nanosheets for Advanced Asymmetric Supercapacitors

Chemical and Electronic Modulation via Atomic Layer Deposition of NiO on Porous In₂O₃ Films to Boost NO₂ Detection

Effect of synthesis routes on electrochemical properties as supercapacitor electrode for novel spinel (CuNiFeMnCo)₃O₄ high entropy oxide