Implanting cation vacancies in Ni-Fe LDHs for efficient oxygen evolution reactions of lithium-oxygen batteries

Zhou, Yin; Yan, Dafeng; Gu, Qianfeng; Zhu, Shenghua; Wang, Li; Peng, Honggen; Zhao, Yong

doi:10.1016/j.apcatb.2020.119792

Cited by 74 publications

(43 citation statements)

References 52 publications

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“…The growing demand in electric vehicles and consumer electronics calls for high-energy-density batteries as an alternative to the prevailing Li-ion batteries (LIBs) [1][2][3][4]. Rechargeable aprotic Li-O 2 batteries (LOBs) are a promising option because of their ultra-high theoretical energy density [5]. Traditional LOBs achieve energy conversion based on the overall reaction of 2Li + + 2e − + O 2 ↔ Li 2 O 2 ; the corresponding reaction kinetics is sluggish, and the discharge product Li 2 O 2 is highly aggressive toward the electrolyte and the cathode, leading to high polarization and poor cycle stability [6,7].…”

Section: Introductionmentioning

confidence: 99%

Reversible LiOH chemistry in Li-O2 batteries with free-standing Ag/δ-MnO2 nanoflower cathode

et al. 2022

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The low energy efficiency and poor cycle stability arising from the high aggressivity of discharge products toward organic electrolytes limit the practical applications of Li-O 2 batteries (LOBs). Compared with the typical discharge product Li 2 O 2 , LiOH shows better chemical and electrochemical stability. In this study, a free-standing cathode composed of hydrangea-like δ-MnO 2 with Ag nanoparticles (NPs) embedded in carbon paper (CP) (Ag/δ-MnO 2 @CP) is fabricated and used as the catalyst for the reversible formation and decomposition of LiOH. The possible discharge mechanism is investigated by in situ Raman measurement and density functional theory calculation. Results confirm that δ-MnO 2 dominantly catalyzes the conversion reaction of discharge intermediate LiO 2* to LiOH and that Ag particles promote its catalytic ability. In the presence of Ag/δ-MnO 2 @ CP cathode, the LOB exhibits enhanced specific capacity and a high discharge voltage plateau under humid O 2 atmosphere. At a current density of 200 mA g −1 , the LOB with the Ag/δ-MnO 2 @CP cathode presents an overpotential of 0.5 V and an ultra-long cycle life of 867 cycles with a limited specific capacity of 500 mA h g −1 . This work provides a fresh view on the role of solid catalysts in LOBs and promotes the development of LOBs based on LiOH discharge product for practical applications.

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Section: Introductionmentioning

confidence: 99%

Reversible LiOH chemistry in Li-O2 batteries with free-standing Ag/δ-MnO2 nanoflower cathode

et al. 2022

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“…The cation vacancies work a vital role in optimizing the OER performance by facilitates the adsorption of OER intermediates, which is consistent with the results reported by others. 38 In addition, the OER performance of CoFe 1/3V -LDH is better than that of CoFe 1/6V -LDH, which reflected the importance for density regulation of vacancies. However, after Pt loading, the OER performance of Pt@CoFe V -LDH became slightly worse, as the active sites were provided by the cation vacancies (Fig.…”

Section: Resultsmentioning

confidence: 95%

Cation vacancy driven efficient CoFe-LDH-based electrocatalysts for water splitting and Zn–air batteries

et al. 2021

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“…Mostly, the research on aprotic lithium air battery was conducted using pure oxygen [69][70][71][72][73][74][75][76][77][78][79]. The use of pure oxygen in practical application had some serious issues like additional storage weight, refilling of cylinder and safety issues which are considered to be the hindrances in practical LAB.…”

Section: Problems Associated With Operation Of Aprotic Lithium Air Ba...mentioning

confidence: 99%

Aprotic lithium air batteries with oxygen-selective membranes

Uzair

Zahoor

Shaikh

et al. 2022

Mater Renew Sustain Energy

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Rechargeable batteries have gained a lot of interests due to rising trend of electric vehicles to control greenhouse gases emissions. Among all type of rechargeable batteries, lithium air battery (LAB) provides an optimal solution, owing to its high specific energy of 11,140 Wh/kg comparable to that of gasoline 12,700 Wh/kg. However, LABs are not widely commercialized yet due to the reactivity of the lithium anode with the components of ambient air such as moisture and carbon dioxide. To address this challenge, it is important to understand the effects of moisture on the electrochemical performance of LAB. In this review, the effects of ambient air on the electrochemical performance of LAB have been discussed. The literature on the deterioration in the battery capacity and cyclability due to operation in ambient environment and degradation of lithium anode due to exothermic reaction between lithium and water is reviewed and explained. The effects of using oxygen-selective membrane (OSM) to block moisture and $${\mathrm{CO}}_{2}$$ CO 2 contamination has also been discussed, along with suitable materials that can act as OSM. It is concluded that the utilization of OSM can not only make the safer operation of LAB in ambient air but could also enhance the electrochemical performance of LAB. Future direction of the research work required to address the associated challenges is also provided.

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Implanting cation vacancies in Ni-Fe LDHs for efficient oxygen evolution reactions of lithium-oxygen batteries

Cited by 74 publications

References 52 publications

Reversible LiOH chemistry in Li-O2 batteries with free-standing Ag/δ-MnO2 nanoflower cathode

Reversible LiOH chemistry in Li-O2 batteries with free-standing Ag/δ-MnO2 nanoflower cathode

Cation vacancy driven efficient CoFe-LDH-based electrocatalysts for water splitting and Zn–air batteries

Aprotic lithium air batteries with oxygen-selective membranes

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