Co–Ni Alloy Encapsulated by N-doped Graphene as a Cathode Catalyst for Rechargeable Hybrid Li–Air Batteries

Chang, Zheng; Yu, Feng; Liu, Zaichun; Peng, Shou; Guan, Min; Shen, Xiang; Zhao, Shulin; Liu, Nian; Wu, Yuping; Chen, Yuhui

doi:10.1021/acsami.9b12213

Cited by 38 publications

(35 citation statements)

References 37 publications

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“…The resultant LSV curves are displayed in Figure S4. The LSV curve of the benchmark catalyst (20 % Pt/C) shows lower onset potential of 0.75 V, which is usually reported in the literature . The LSV curve of the CCFOC shows a higher onset potential of 0.94 V. It is noteworthy that the present catalyst exhibits much higher onset potential compared to that of the benchmark (Pt/C) catalyst.…”

Section: Resultssupporting

confidence: 73%

“…To achieve maximum rate and prevent electrocatalyst corrosion, it is desired that the ORR should proceed via direct 4e − pathway, which is expected to result in better battery performances. To verify this, the obtained LSV curves were analyzed using Koutecky‐Levich (K‐L) equation . Figure (c) shows the obtained K‐L plots for the CCFOC electrocatalyst at different potentials.…”

Section: Resultsmentioning

confidence: 93%

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Porous Carbon Networks Decorated with Cobalt on CoFe₂O₄ as an Air‐Breathing Electrode for High‐Capacity Rechargeable Lithium‐Air Batteries: Role of Metallic Cobalt Nanoparticles

Athika

Elumalai

2020

ChemElectroChem

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The development of cost‐effective efficient bifunctional electrocatalysts for metal‐air batteries is an important aspect for its commercialization. We demonstrate the effect of Co nanoparticles and/or the porous carbon matrix in pristine CoFe2O4 (CFO) electrocatalysts towards the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER). The Co/CoFe2O4‐carbon network (CCFOC) with a high surface area and good conductivity offered more active sites for oxygen adsorption as well as accelerated electron transfer kinetics, leading to superior ORR and OER activities. A Li‐air battery split cell was fabricated using the CCFOC as an air‐breathing electrode, which exhibited a high discharge capacity of 4320 mAh g−1 at a high current density of 100 mA g−1 with an acceptable cycling stability and columbic efficiency. The fabricated coin cell or the split cell Li‐air battery could power a commercial 2.8 V green LED bulb continuously for more than 6 h.

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Section: Resultssupporting

confidence: 73%

Section: Resultsmentioning

confidence: 93%

Porous Carbon Networks Decorated with Cobalt on CoFe₂O₄ as an Air‐Breathing Electrode for High‐Capacity Rechargeable Lithium‐Air Batteries: Role of Metallic Cobalt Nanoparticles

Athika

Elumalai

2020

ChemElectroChem

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“…Chang et al fabricated a hybrid Li‐O 2 battery using a protected Li metal anode and a porous air cathode in an aqueous electrolyte (LiOH solution), which avoided the insoluble and insulating Li 2 O 2 product usually existed in nonaqueous Li‐O 2 battery (Figure 8b). [ 119 ] This aqueous Li‐O 2 battery finally achieved a high energy density of 3158 Wh kg −1 and a high power density of 134.2 W m −2 .…”

Section: Representative Aqueous Rechargeable Metal Batteriesmentioning

confidence: 99%

Stabilization Perspective on Metal Anodes for Aqueous Batteries

Wang

Tan

Yang

et al. 2020

Advanced Energy Materials

133

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Aqueous electrolyte‐based batteries have attracted increasing attention because of nonflammability, low cost, high power density, and environmental friendliness. However, the low energy density of aqueous lithium‐ion batteries caused by the narrow stable electrochemical window of water and electrode materials with low capacity severely limits their further development. In this regard, the development of metal anodes with high specific capacity shows excellent prospects. For example, metal zinc and aluminum anodes have high theoretical specific capacity, rich resources, and environmental friendliness, and can be used as promising anodes for high‐energy‐density aqueous rechargeable metal batteries. Unfortunately, metal anodes usually face balance issues with regard to stability and activity associated with dendrite growth and undesired side reactions in water‐based electrolytes, which is still a great challenge for aqueous metal batteries. In this review, various aqueous metal batteries including aqueous rechargeable metal batteries and aqueous metal–air batteries are summarized and highlighted. Recent advances in the design of high‐safety aqueous electrolytes and the strategies for metal anode protection are comprehensively reviewed. In addition, emerging challenges and some perspectives on the development of high‐energy‐density aqueous metal batteries are included.

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“…[ 81–83 ] Moreover, the cathode should possess high catalytic activity to facilitate the OER and ORR reactions of Li–air battery, and porous structure to store the discharge products. [ 84–88 ] Therefore, it is urgently required to develop flexible and high‐performance cathode materials with high mechanical stability for flexible Li–air batteries.…”

Section: Flexible Cathodesmentioning

confidence: 99%

Recent Progress of Flexible Lithium–Air/O₂ Battery

Liu

Yang

Zhang

2020

Adv Materials Technologies

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volume and improving its energy density. [39-47] Under the proposition of guaranteeing electrochemical performance, the components in the flexible metal-air battery, including active cathodes, metal anodes, separators, current collectors, and packaging materials, should be flexible to endure frequent mechanical strain. [48-54] Moreover, the safety of flexible battery is paramount during repeated deformation conditions. [55-60] Up to now, there are many flexible metal-air batteries have been proposed, such as flexible lithium (Li)-air battery, flexible Li-CO 2 battery, flexible zinc-air battery, flexible aluminum-air battery, silicon-oxygen battery, and so on. [61-71] Among various metalair batteries, Li-air batteries have raised much concern and got rapid development as a result of their theoretical energy density up to 5928 Wh kg −1 , eco-friendly, good reversibility, and high operating voltage of 2.96 V. [24,25,72-74] Here, we review the latest advances of flexible Li-air battery, focusing on the fabrication of flexible cathodes for improving the electrochemical performance, development of electrolyte for obtaining long durability, design of battery structure for achieving high flexibility. It should be noted that some reported studies on Li-air batteries were tested in the oxygen atmosphere rather than the ambient air, which is described as "Li-O 2 batteries." [27,75] 2. Flexible Cathodes The typical Li-air battery commonly made of Li metal anode, air cathode and aprotic electrolyte, which worked through the reaction of 2Li + O 2 → Li 2 O 2 (E OCV = 2.96 V). [76-80] As mentioned above, all components in flexible Li-air batteries should be flexible to accommodate stresses and strains in deformation. [10] However, the cathode and current collector are typically rigid carbon paper or porous metal, which hardly meet the needs of flexible Li-air battery, seriously restricting the development of the battery flexibility. [81-83] Moreover, the cathode should possess high catalytic activity to facilitate the OER and ORR reactions of Li-air battery, and porous structure to store the discharge products. [84-88] Therefore, it is urgently required to develop flexible and high-performance cathode materials with high mechanical stability for flexible Li-air batteries. Different from carbon paper with a rigid structure, carbon cloth is flexible that woven from multistrands of carbon fiber. Because of its mechanical flexibility and conductivity, carbon cloth was widely used as a flexible substrate material for the cathode in Li-air battery. [89-92] Liu et al. first proposed a flexible Li-O 2 battery with a flexible and recoverable cathode that constructed on the carbon cloth by depositing densely TiO 2 Along with the popularity of flexible electronic products, the requirements for flexible energy storage devices are also increasing, including high energy density, long-term stability, and high-grade safety. Among various flexible energy storage devices, flexible lithium-air batteries are expected to be one of the best candidate...

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Co–Ni Alloy Encapsulated by N-doped Graphene as a Cathode Catalyst for Rechargeable Hybrid Li–Air Batteries

Cited by 38 publications

References 37 publications

Porous Carbon Networks Decorated with Cobalt on CoFe₂O₄ as an Air‐Breathing Electrode for High‐Capacity Rechargeable Lithium‐Air Batteries: Role of Metallic Cobalt Nanoparticles

Porous Carbon Networks Decorated with Cobalt on CoFe₂O₄ as an Air‐Breathing Electrode for High‐Capacity Rechargeable Lithium‐Air Batteries: Role of Metallic Cobalt Nanoparticles

Stabilization Perspective on Metal Anodes for Aqueous Batteries

Recent Progress of Flexible Lithium–Air/O₂ Battery

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Co–Ni Alloy Encapsulated by N-doped Graphene as a Cathode Catalyst for Rechargeable Hybrid Li–Air Batteries

Cited by 38 publications

References 37 publications

Porous Carbon Networks Decorated with Cobalt on CoFe2O4 as an Air‐Breathing Electrode for High‐Capacity Rechargeable Lithium‐Air Batteries: Role of Metallic Cobalt Nanoparticles

Porous Carbon Networks Decorated with Cobalt on CoFe2O4 as an Air‐Breathing Electrode for High‐Capacity Rechargeable Lithium‐Air Batteries: Role of Metallic Cobalt Nanoparticles

Stabilization Perspective on Metal Anodes for Aqueous Batteries

Recent Progress of Flexible Lithium–Air/O2 Battery

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Product

Resources

About

Porous Carbon Networks Decorated with Cobalt on CoFe₂O₄ as an Air‐Breathing Electrode for High‐Capacity Rechargeable Lithium‐Air Batteries: Role of Metallic Cobalt Nanoparticles

Porous Carbon Networks Decorated with Cobalt on CoFe₂O₄ as an Air‐Breathing Electrode for High‐Capacity Rechargeable Lithium‐Air Batteries: Role of Metallic Cobalt Nanoparticles

Recent Progress of Flexible Lithium–Air/O₂ Battery