Recent Progress in Defective Carbon‐Based Oxygen Electrode Materials for Rechargeable Zink‐Air Batteries

Wang, Sidi; Jiang, Hongliang; Li, Song

doi:10.1002/batt.201900001

Cited by 47 publications

(24 citation statements)

References 143 publications

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“…This is a great progress of understanding the mechanism of the carbon-based ORR catalyst. Based on the second law of thermodynamics [22,36], carbon materials always have defects or disorder structure in the edge or surface. The absence of carbon atoms and/or the reconstructed lattice structures can break the electron-hole symmetry undoubtedly and possess higher charge and spin densities in comparison with ordinary carbon atoms [26,29,33,[37][38][39][40][41][42][43][44].…”

Section: Introductionmentioning

confidence: 99%

Defect and Doping Co-Engineered Non-Metal Nanocarbon ORR Electrocatalyst

et al. 2021

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Exploring low-cost and earth-abundant oxygen reduction reaction (ORR) electrocatalyst is essential for fuel cells and metal–air batteries. Among them, non-metal nanocarbon with multiple advantages of low cost, abundance, high conductivity, good durability, and competitive activity has attracted intense interest in recent years. The enhanced ORR activities of the nanocarbons are normally thought to originate from heteroatom (e.g., N, B, P, or S) doping or various induced defects. However, in practice, carbon-based materials usually contain both dopants and defects. In this regard, in terms of the co-engineering of heteroatom doping and defect inducing, we present an overview of recent advances in developing non-metal carbon-based electrocatalysts for the ORR. The characteristics, ORR performance, and the related mechanism of these functionalized nanocarbons by heteroatom doping, defect inducing, and in particular their synergistic promotion effect are emphatically analyzed and discussed. Finally, the current issues and perspectives in developing carbon-based electrocatalysts from both of heteroatom doping and defect engineering are proposed. This review will be beneficial for the rational design and manufacturing of highly efficient carbon-based materials for electrocatalysis.

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Section: Introductionmentioning

confidence: 99%

Defect and Doping Co-Engineered Non-Metal Nanocarbon ORR Electrocatalyst

et al. 2021

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“…However, these catalysts used in ECR have some common disadvantages, such as low selectivity and poor durability, which hinder their wide application. Carbon-based catalysts have become one of the most promising materials to replace metal materials for ECR due to the advantages of wide source of raw materials, controllable structure, good chemical stability, and electrical conductivity, and has been widely concerned and studied in recent years [ 23 , 24 ]. Among them, defective CBN have generally better ECR activity after design, and have become a research hotspot for improving ECR performance.…”

Section: Evaluation Parameters and Mechanism Of Ecrmentioning

confidence: 99%

“…However, the high cost, poor long-term stability, and low natural reserves of noble metals hinder their commercialization. Carbon-based nanomaterials (CBN) have become one of the main effective materials to replace noble metal catalysts due to the advantages of wide source of raw materials, controllable structure, good chemical stability, and electrical conductivity [ 23 , 24 ]. Despite these advantages, there is still a large gap between the electrocatalytic performance of pure carbon nanomaterials and noble metals.…”

Section: Introductionmentioning

confidence: 99%

Defect Engineering on Carbon-Based Catalysts for Electrocatalytic CO2 Reduction

et al. 2020

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Electrocatalytic carbon dioxide (CO2) reduction (ECR) has become one of the main methods to close the broken carbon cycle and temporarily store renewable energy, but there are still some problems such as poor stability, low activity, and selectivity. While the most promising strategy to improve ECR activity is to develop electrocatalysts with low cost, high activity, and long-term stability. Recently, defective carbon-based nanomaterials have attracted extensive attention due to the unbalanced electron distribution and electronic structural distortion caused by the defects on the carbon materials. Here, the present review mainly summarizes the latest research progress of the construction of the diverse types of defects (intrinsic carbon defects, heteroatom doping defects, metal atomic sites, and edges detects) for carbon materials in ECR, and unveil the structure–activity relationship and its catalytic mechanism. The current challenges and opportunities faced by high-performance carbon materials in ECR are discussed, as well as possible future solutions. It can be believed that this review can provide some inspiration for the future of development of high-performance ECR catalysts.

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“…The air cathode plays a significant role in ZAB performance. [20] To evaluate the effectiveness of Asy-cathode, we also fabricated a conventional air cathode with the same NiFe-LDH electrocatalysts and identical mass loading (hereinafter referred to as Con-cathode; Figure S10, Supporting Information). Briefly, a hydrophilic carbon cloth (CC) and a hydrophobic CFP were composited using a hot press, and then the electrocatalysts were loaded on the CC side via a controlled drop-casting method.…”

Section: Doi: 101002/adma201908488mentioning

confidence: 99%

“…The air cathode plays a significant role in ZAB performance 20. To evaluate the effectiveness of Asy‐cathode, we also fabricated a conventional air cathode with the same NiFe‐LDH electrocatalysts and identical mass loading (hereinafter referred to as Con‐cathode; Figure S10, Supporting Information).…”

mentioning

confidence: 99%

Asymmetric Air Cathode Design for Enhanced Interfacial Electrocatalytic Reactions in High‐Performance Zinc–Air Batteries

Chang-xin

et al. 2020

Advanced Materials

130

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The rechargeable zinc–air battery (ZAB) is a promising energy storage technology owing to its high energy density and safe aqueous electrolyte, but there is a significant performance bottleneck. Generally, cathode reactions only occur at multiphase interfaces, where the electrocatalytic active sites can participate in redox reactions effectively. In the conventional air cathode, the 2D multiphase interface on the surface of the gas diffusion layer (GDL) inevitably results in an insufficient amount of active sites and poor interfacial contact, leading to sluggish reaction kinetics. To address this problem, a 3D multiphase interface strategy is proposed to extend the reactive interface into the interior of the GDL. Based on this concept, an asymmetric air cathode is designed to increase the accessible active sites, accelerate mass transfer, and generate a dynamically stabilized reactive interface. With a NiFe layered‐double‐hydroxide electrocatalyst, ZABs based on the asymmetric cathode deliver a small charge/discharge voltage gap (0.81 V at 5.0 mA cm−2), a high power density, and a stable cyclability (over 2000 cycles). This 3D reactive interface strategy provides a feasible method for enhancing the air cathode kinetics and further enlightens electrode designs for energy devices involving multiphase electrochemical reactions.

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Recent Progress in Defective Carbon‐Based Oxygen Electrode Materials for Rechargeable Zink‐Air Batteries

Cited by 47 publications

References 143 publications

Defect and Doping Co-Engineered Non-Metal Nanocarbon ORR Electrocatalyst

Defect and Doping Co-Engineered Non-Metal Nanocarbon ORR Electrocatalyst

Defect Engineering on Carbon-Based Catalysts for Electrocatalytic CO2 Reduction

Asymmetric Air Cathode Design for Enhanced Interfacial Electrocatalytic Reactions in High‐Performance Zinc–Air Batteries

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