Rich atomic interfaces between sub-1 nm RuOx clusters and porous Co3O4 nanosheets boost oxygen electrocatalysis bifunctionality for advanced Zn-air batteries

Lü, Qian; Guo, Yanan; Mao, Peng; Liao, Kaiming; Zou, Xiaohong; Dai, Jie; Tan, Peng; Ran, Ran; Zhou, Wei; Ni, Meng; Shao, Zongping

doi:10.1016/j.ensm.2020.06.015

Cited by 95 publications

(59 citation statements)

References 41 publications

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“…[2,51,52] The particle size of the catalysts is also highly relevant to their catalytic activities. [53][54][55][56] When the catalyst size is reduced from micrometer-scale to nanoscale, the physical and chemical properties of the catalysts change significantly due to quantum effects, and consequently affect the behavior and properties of catalysts such as electrochemically catalytic reactivity, surface area, electrical conductivity, and structures. Seo et al [57] synthesized carbon nanotube (CNT)-supported cobalt oxide nanoparticles (NPs) (CoO x /CNTs) with the size distribution of 3-10 nm, and investigated their size dependency for bifunctional oxygen catalysis.…”

Section: Defect Chemistry Of Bifunctional Electrocatalystmentioning

confidence: 99%

“…[ 2,51,52 ] The particle size of the catalysts is also highly relevant to their catalytic activities. [ 53–56 ] When the catalyst size is reduced from micrometer‐scale to nanoscale, the physical and chemical properties of the catalysts change significantly due to quantum effects, and consequently affect the behavior and properties of catalysts such as electrochemically catalytic reactivity, surface area, electrical conductivity, and structures. Seo et al.…”

Section: Defect Chemistry Of Bifunctional Electrocatalystmentioning

confidence: 99%

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Defect Electrocatalysts and Alkaline Electrolyte Membranes in Solid‐State Zinc–Air Batteries: Recent Advances, Challenges, and Future Perspectives

Zhang

et al. 2020

Small Methods

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Rechargeable zinc–air batteries (ZABs) have attracted much attention due to their promising capability for offering high energy density while maintaining a long operational lifetime. One of the biggest challenges in developing all‐solid‐state ZABs is to design suitable bifunctional air‐electrodes, which can efficiently catalyze the key oxygen reduction reaction (ORR)/oxygen evolution reaction (OER) electrochemical processes. The other one is to develop robust electrolyte membranes with high ionic conductivity and superb water retention capability. In this review, an in‐depth discussion of the challenges, mechanisms, and design strategies for the defect electrocatalyst and the electrolyte membrane in all‐solid‐state ZABs will be offered. In particular, the crucial defect engineering strategies to tune the ORR/OER catalysts are summarized, including direct controllable strategies: 1) atomically dispersed metal sites control, 2) vacancy defects control, and 3) lattice‐strain control, and the indirect strategies: 4) crystallographic structure control and 5) metal–carbon support interaction control. Moreover, the most recent progress in designing electrolyte membranes, including polyvinyl alcohol‐based membranes and gel polymer electrolyte membranes, is presented. Finally, the perspectives are proposed for rational design and fabrication of the desired air electrode and electrolyte membrane to improve the performance and prolong the lifetime of all‐solid‐state ZABs.

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Section: Defect Chemistry Of Bifunctional Electrocatalystmentioning

confidence: 99%

Section: Defect Chemistry Of Bifunctional Electrocatalystmentioning

confidence: 99%

Defect Electrocatalysts and Alkaline Electrolyte Membranes in Solid‐State Zinc–Air Batteries: Recent Advances, Challenges, and Future Perspectives

Zhang

et al. 2020

Small Methods

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“…[ 5–7 ] Zn–air batteries that use an aqueous alkaline solution as the electrolyte and abundant Zn as the anode have attracted considerable attention recently with a wide range of application potential, due mostly to their advantageous features of high energy density (1218 Wh kg −1 ), high safety (no organic electrolyte), and low cost (cheap Zn raw material). [ 8–10 ] However, the performance of Zn–air batteries is strongly dependent on the air electrode, and most of the available Zn–air batteries show poor rate capability and round‐trip efficiency due to the unsatisfactory cathode performance. Alkaline Zn–transition metal compound (Zn–MX) batteries (e.g., Zn–Co batteries, Zn–Ni batteries) are important categories of Zn‐based batteries.…”

Section: Introductionmentioning

confidence: 99%

A Function‐Separated Design of Electrode for Realizing High‐Performance Hybrid Zinc Battery

Zhong

Liu

et al. 2020

Advanced Energy Materials

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101

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A rechargeable hybrid zinc battery is developed for reaching high power density and high energy density simultaneously by introducing an alkaline Zn–transition metal compound (Zn–MX) battery function into a Zn–air battery. However, the conventional single‐layer electrode design cannot satisfy the requirements of both a hydrophilic interface for facilitating ionic transfer to maximize the Zn–MX battery function and a hydrophobic interface for promoting gas diffusion to maximize the Zn–air battery function. Here, a function‐separated design is proposed, which allocates the two battery functions to the two faces of the cathode. The electrode is composed of a hydrophobic MnS layer decorated with Ni–Co–S nanoclusters that allows for smooth gas diffusion and efficient oxygen electrocatalysis and a hydrophilic NixCo1−xS2 layer that favors fast ionic transfer and superior performance for energy storage. The battery with the function‐separated electrode shows a high short‐term discharge voltage of ≈1.7 V, an excellent high‐rate galvanostatic discharge–charge with a power density up to 153 mW cm−2 at 100 mA cm−2, a good round‐trip efficiency of 75% at 5 mA cm−2, and a robust cycling stability for 330 h with an excellent voltage gap of ≈0.7 V at 5 mA cm−2.

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“…Metal–air batteries consist of a pure metal (e.g., Li, Na, Zn, Al) anode and an external cathode of ambient air with an aqueous or aprotic electrolyte. To be suitable for rechargeable batteries, the oxygen electrocatalysts should exhibit effective catalytic activity, not only for the oxygen reduction reaction (ORR), but also for the oxygen evolution reaction (OER)—that is, they should exhibit bifunctionality [ 10 , 11 , 12 , 13 , 14 , 15 ]. However, due to the sluggish reaction kinetics of the ORR and OER (which respectively correspond to the discharge and charge processes), the development of highly efficient and cost-effective oxygen electrocatalysts is considered to be an essential challenge.…”

Section: Introductionmentioning

confidence: 99%

A Bifunctional Hybrid Electrocatalyst for Oxygen Reduction and Oxygen Evolution Reactions: Nano-Co3O4-Deposited La0.5Sr0.5MnO3 via Infiltration

Kim

Manthiram

2021

Molecules

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For rechargeable metal–air batteries, which are a promising energy storage device for renewable and sustainable energy technologies, the development of cost-effective electrocatalysts with effective bifunctional activity for both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) has been a challenging task. To realize highly effective ORR and OER electrocatalysts, we present a hybrid catalyst, Co3O4-infiltrated La0.5Sr0.5MnO3-δ (LSM@Co3O4), synthesized using an electrospray and infiltration technique. This study expands the scope of the infiltration technique by depositing ~18 nm nanoparticles on unprecedented ~70 nm nano-scaffolds. The hybrid LSM@Co3O4 catalyst exhibits high catalytic activities for both ORR and OER (~7 times, ~1.5 times, and ~1.6 times higher than LSM, Co3O4, and IrO2, respectively) in terms of onset potential and limiting current density. Moreover, with the LSM@Co3O4, the number of electrons transferred reaches four, indicating that the catalyst is effective in the reduction reaction of O2 via a direct four-electron pathway. The study demonstrates that hybrid catalysts are a promising approach for oxygen electrocatalysts for renewable and sustainable energy devices.

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Rich atomic interfaces between sub-1 nm RuOx clusters and porous Co3O4 nanosheets boost oxygen electrocatalysis bifunctionality for advanced Zn-air batteries

Cited by 95 publications

References 41 publications

Defect Electrocatalysts and Alkaline Electrolyte Membranes in Solid‐State Zinc–Air Batteries: Recent Advances, Challenges, and Future Perspectives

Defect Electrocatalysts and Alkaline Electrolyte Membranes in Solid‐State Zinc–Air Batteries: Recent Advances, Challenges, and Future Perspectives

A Function‐Separated Design of Electrode for Realizing High‐Performance Hybrid Zinc Battery

A Bifunctional Hybrid Electrocatalyst for Oxygen Reduction and Oxygen Evolution Reactions: Nano-Co3O4-Deposited La0.5Sr0.5MnO3 via Infiltration

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