A current collector covering nanostructured villous oxygen-deficient NiO fabricated by rapid laser-scan for Li-O2 batteries

Mu, Xiaowei; Wen, Qiuhao; Ou, Gang; Du, Yuemin; He, Ping; Zhong, Minlin; Zhu, Hong; Wu, Hui; Yang, Sixie; Liu, Yijie; Li, Bojie; Zhang, Xueping; Zhou, Haoshen

doi:10.1016/j.nanoen.2018.06.043

Cited by 54 publications

(27 citation statements)

References 45 publications

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“…According to previous literature, Hubbard U (DFT+U) corrections were performed for 3d transition metal. [65] And the Gibbs free energy (G) was calculated based on the equation: G = E + E ZPE − TS − neU, where E, E ZPE , S, n, and U represent the total energy, zero point energy, entropy, the number of electrons participating in reaction and electrode potential, respectively. The calculation formula of overpotential (η) is η = U C − U DC .…”

Section: Methodsmentioning

confidence: 99%

Interfacial Electron Redistribution of Hydrangea‐like NiO@Ni₂P Heterogeneous Microspheres with Dual‐Phase Synergy for High‐Performance Lithium–Oxygen Battery

Yan

Ran

Zeng

et al. 2022

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ultimately increasing the charge transfer resistance. [8] During the OER process, the insulated Li 2 O 2 can only be decomposed at high overpotential, which can trigger severe parasitic reactions. [9][10][11] Therefore, exploring efficient bifunctional electrocatalysts and understanding the formation and decomposition mechanism of Li 2 O 2 is of great significance for effectively reducing ORR and OER overpotential and improving the electrochemical performance of LOBs.Currently, two types of mechanisms (solution-mediated pathway and surface adsorption pathway) were commonly recommended to explain the deposition process of Li 2 O 2 on the electrode surface during ORR. Different mechanisms lead to various structure (crystallinity or defect) and morphology (toroid or thin film) of Li 2 O 2 , eventually determining the battery performance. [12] For the solution-mediated pathway, disproportionation reaction of dissolved intermediate LiO 2 usually forms a large-size toroid-like Li 2 O 2 , resulting in a large discharge capacity but a high charge overpotential which is due to the limited contact between large-size discharge products and electrode surface. [3,12] For the surface adsorption pathway, electrode surface shows strong adsorption toward intermediate LiO 2 , finally leading to the deposition of thin film-like amorphous Li 2 O 2 on the oxygen electrode. The thin film-like Li 2 O 2 is in close contact with electrode, which is beneficial to reduce the charging overpotential. However, film-like discharge product will deliver a small discharge capacity because of the quickly passivated electrode surface. [13] As a result, designing porous oxygen electrodes with tuned adsorption capacity towards O-containing intermediates is essential for LOBs with both large discharge capacity and small charge overpotential. Generally, regulating the heterogeneous interfaces in the catalytic materials to realize the electronic modulation through interfacial coupling has proved to be an effective strategy for optimizing the chemical adsorption of the O-containing intermediates and accelerating the kinetics of oxygen electrode reactions. [14][15][16] Specifically, to achieve the thermodynamic equilibrium state, two regions of opposing charge distribution and a built-in electric field will be created at the interface of the heterostructure, where the strong charge region can modulate the adsorption of reactant, while the built-in Lithium-oxygen batteries (LOBs) with ultra-high theoretical energy density (≈3500 Wh kg −1 ) are considered as the most promising energy storage systems. However, the sluggish kinetics during the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) can induce large voltage hysteresis, inferior roundtrip efficiency and unsatisfactory cyclic stability. Herein, hydrangea-like NiO@Ni 2 P heterogeneous microspheres are elaborately designed as high-efficiency oxygen electrodes for LOBs. Benefitting from the interfacial electron redistribution on NiO@Ni 2 P heterostructure, the electronic structure can b...

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Section: Methodsmentioning

confidence: 99%

Interfacial Electron Redistribution of Hydrangea‐like NiO@Ni₂P Heterogeneous Microspheres with Dual‐Phase Synergy for High‐Performance Lithium–Oxygen Battery

Yan

Ran

Zeng

et al. 2022

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“…electrochemical reduction (Equation ( 10)) of LiO 2 after the dissolved oxygen molecules form LiO 2 with Li + . The generated Li 2 O 2 is then further converted to Li 2 CO 3 (Equation ( 11)) [45][46][47][48] due to the better thermodynamically stability of Li 2 CO 3 than Li 2 O 2…”

Section: Discharge Mechanism Of O 2 -Involved Li-co 2 Batteriesmentioning

confidence: 99%

Metal–CO₂ Electrochemistry: From CO₂ Recycling to Energy Storage

Wang

Xia

et al. 2021

Advanced Energy Materials

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Nevertheless, these electrochemical systems usually show unsatisfactory energy conversion efficiency, on account of the thermodynamic stable CO bond in CO 2 molecule (≈806 kJ mol −1 ), endothermic reaction with a high barrier, and multielectron/proton transfer control on the catalyst surface. [13] In this regard, direct CO 2 electrochemical reduction is conducive to capture CO 2 , reduce CO 2 accumulation, boost reaction kinetics, and enhance energy conversion efficiency synchronously. Among all explored systems for CO 2 electrochemical reduction, metal-CO 2 batteries have become a new hotspot because of the independence of real-time electricity input to drive CO 2 conversion [14] and the high energy density of whole cell. Although the research state of these techniques is quite primary, the unique features of fixating CO 2 gas and reserving energy underpin these techniques to alleviate energy issues and climate crises simultaneously. The metal-CO 2 batteries are similar to the electrochemical CO 2 reduction technology in achieving the CO 2 cycle; however, they have the advantage of allowing intermittent electricity input. Furthermore, metal-CO 2 batteries show promising prospects in the future [15] by conversing excessive CO 2 into value-added chemicals, storing surplus electricity from other power supply systems (e.g., fossil fuels, nuclear, and renewable power), and balancing the energy storage and carbon cycle.The origin of metal-CO 2 batteries is based on the addition of CO 2 in Li/Na-O 2 batteries to promote the discharge capacity and energy density. The first article of the primary Li-CO 2 battery with pure CO 2 supply with a nonaqueous electrolyte at moderate temperatures was reported in 2013. [16] Since then, diverse rechargeable metal-CO 2 batteries used various metals anode was constructed and systematically analyzed in the past few years [17] As such, with the introduction of carbon-based materials and metal-based materials, such as graphite, carbon nanotubes (CNTs), and precious metals, as catalysts for the reaction, the performance of metal-CO 2 batteries have been significantly improved, showing great potential in the area of efficient energy storage and electricity supply. [18][19][20][21] After that, the first rechargeable aqueous Zn-CO 2 battery was reported, which can realize the reversible conversion between CO 2 and liquid HCOOH and verified with the application prospects of metal-CO 2 batteries in the production of highly selective carbon-containing compounds. [22] Metal-CO 2 batteries are among the most intriguing techniques for addressing the severe climate crisis and have matured significantly to simultaneously realize adequate fixation of CO 2 , energy storage, and conversion. Although significant efforts have been made, the practical application of metal-CO 2 battery techniques is still restricted by various tremendous challenges, namely high charge potential, poor rate capability, and reversibility. This review seeks to present a realistic assessment of the most advanced metal-CO 2 sy...

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“…Among them, NiO was synthesized by LH of Ni foil with a size of 10 cm Â 10 cm, and could be directly used as an electrocatalyst for HER and OER in 1 mol L À1 KOH. Similarly, the Ni foam was heated using a fast laser-scan and converted into nanostructured NiO with oxygen vacancies [129]. In Fig.…”

Section: Synthesis Of Metal-based Nanomaterials By Lhmentioning

confidence: 99%

Non-thermal radiation heating synthesis of nanomaterials

et al. 2021

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A current collector covering nanostructured villous oxygen-deficient NiO fabricated by rapid laser-scan for Li-O2 batteries

Cited by 54 publications

References 45 publications

Interfacial Electron Redistribution of Hydrangea‐like NiO@Ni₂P Heterogeneous Microspheres with Dual‐Phase Synergy for High‐Performance Lithium–Oxygen Battery

Interfacial Electron Redistribution of Hydrangea‐like NiO@Ni₂P Heterogeneous Microspheres with Dual‐Phase Synergy for High‐Performance Lithium–Oxygen Battery

Metal–CO₂ Electrochemistry: From CO₂ Recycling to Energy Storage

Non-thermal radiation heating synthesis of nanomaterials

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A current collector covering nanostructured villous oxygen-deficient NiO fabricated by rapid laser-scan for Li-O2 batteries

Cited by 54 publications

References 45 publications

Interfacial Electron Redistribution of Hydrangea‐like NiO@Ni2P Heterogeneous Microspheres with Dual‐Phase Synergy for High‐Performance Lithium–Oxygen Battery

Interfacial Electron Redistribution of Hydrangea‐like NiO@Ni2P Heterogeneous Microspheres with Dual‐Phase Synergy for High‐Performance Lithium–Oxygen Battery

Metal–CO2 Electrochemistry: From CO2 Recycling to Energy Storage

Non-thermal radiation heating synthesis of nanomaterials

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Resources

About

Interfacial Electron Redistribution of Hydrangea‐like NiO@Ni₂P Heterogeneous Microspheres with Dual‐Phase Synergy for High‐Performance Lithium–Oxygen Battery

Interfacial Electron Redistribution of Hydrangea‐like NiO@Ni₂P Heterogeneous Microspheres with Dual‐Phase Synergy for High‐Performance Lithium–Oxygen Battery

Metal–CO₂ Electrochemistry: From CO₂ Recycling to Energy Storage