Sustainable, economic, and simple preparation of an efficient catalyst for Li–O2 batteries

Amici, Julia; Márquez, Paulina; Mangini, Anna; Torchio, Claudia; Dessantis, Davide; Versaci, Daniele; Francia, Carlotta; Aguirre, Marı́a J.; Bodoardo, Silvia

doi:10.1016/j.jpowsour.2022.231942

Cited by 5 publications

(6 citation statements)

References 46 publications

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Section: Resultsmentioning

confidence: 99%

“…As for the ORR activity studies, LSV tests in O 2 saturated 0.1 m KOH solution were carried out using the rotating disk electrode (RDE). [ 45,46 ] The active materials were scraped from the nanoarray electrodes and loaded on a glass carbon electrode. Figure S8a–c (Supporting Information) shows the typical LSVs of Co 3 O 4 , MnO 2, and MnO 2 −Co 3 O 4 nanosheets at various rotating speeds in the voltage ranges for ORR, respectively.…”

Section: Resultsmentioning

confidence: 99%

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A Grafted Hybrid Nanosheet Array Architecture Enables Efficient Bifunctional Oxygen Catalytic Electrodes for Rechargeable Lithium−Oxygen Batteries

Li,

et al. 2023

Advanced Sustainable Systems

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To fully manifest the high energy densities of lithium−oxygen (Li−O2) batteries, bifunctional catalytic cathodes that efficiently facilitate both the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER) are mandatorily required. However, catalysts with intrinsic bifunctional catalytic activities are limited in practice. In addition, the practical utilization rate of oxygen catalytic cathodes is usually lower due to the deposition of insoluble discharge product Li2O2. To address these issues, this work proposes a grafted hybrid nanosheet array architecture to enable efficient bifunctional oxygen catalytic cathodes for Li−O2 batteries. As a demonstration, Co3O4 nanosheet arrays (MnO2−Co3O4@CC) grafted with MnO2 nanosheets are prepared on carbon cloth by facile electrodeposition followed by calcination in air. The mutually perpendicular Co3O4 and MnO2 nanosheets in the grafted architecture enable both the ORR catalytically active site of MnO2 and the OER catalytically active site of Co3O4 easily accessible during repeated cycling. Thus, the synergistic bifunctional catalysis of hybrid MnO2−Co3O4@CC is effectively realized to deliver a high specific capacity of 8115 mA h g−1 and a low overall overpotential of 0.64 V. This work provides a universal and effective approach for fabricating various efficient catalytic electrodes via the facile integration of different nanomaterials on nanoarray architectures.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

A Grafted Hybrid Nanosheet Array Architecture Enables Efficient Bifunctional Oxygen Catalytic Electrodes for Rechargeable Lithium−Oxygen Batteries

Li,

et al. 2023

Advanced Sustainable Systems

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“…Comparing the recharged cathode morphologies to the surface of a pristine GDL (Figure S3a), it is possible to observe that the cathode from the CHMA L MW cell recovers its initial appearance, showing no residual discharge products, while the cathode from the bare Li cell is covered by residual degradation products, thus confirming the higher reversibility of the cell containing a protected anode. Indeed, it was previously reported in the literature that the "film-like" discharge product morphology has the advantage of a higher contact area between the surface of the cathode and the discharge products, enhancing the transfer of electrons and therefore the reversibility of such products [54][55][56][57][58]. In order to assess the reversibility of such discharge products, the bare Li and the CHMA LMW protected Li cells were submitted to a full recharge process, meaning that after the previously described discharge, the cells were recharged at 0.1 mA cm −2 up to 4.5 V vs. Li + /Li.…”

Section: Lithium-oxygen Cells Performancementioning

confidence: 99%

“…the surface of the cathode and the discharge products, enhancing the transfer of electrons and therefore the reversibility of such products [54][55][56][57][58].…”

Section: Lithium-oxygen Cells Performancementioning

confidence: 99%

Efficient Biorenewable Membranes in Lithium-Oxygen Batteries

et al. 2023

Self Cite

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Lithium-oxygen batteries, with their very high energy density (3500 Wh kg−1), could represent a real breakthrough in the envisioned strategies towards more efficient energy storage solutions for a less and less carbonated energy mix. However, the problems associated with this technology are numerous. A first one is linked to the high reactivity of the lithium metal anode, while a second one is linked to the highly oxidative environment created by the cell’s O2 saturation. Keeping in mind the necessity for greener materials in future energy storage solutions, in this work an innovative lithium protective membrane is prepared based on chitosan, a polysaccharide obtained from the deacetylation reaction of chitin. Chitosan was methacrylated through a simple, one-step reaction in water and then cross-linked by UV-induced radical polymerization. The obtained membranes were successively activated in liquid electrolyte and used as a lithium protection layer. The cells prepared with protected lithium were able to reach a higher full discharge capacity, and the chitosan’s ability to slow down degradation processes was verified by post-mortem analyses. Moreover, in long cycling conditions, the protected lithium cell performed more than 40 cycles at 0.1 mA cm−2, at a fixed capacity of 0.5 mAh cm−2, retaining 100% coulombic efficiency, which is more than twice the lifespan of the bare lithium cell.

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“…Rechargeable aprotic lithium-oxygen (Li-O 2 ) batteries have been highlighted as a promising alternative technology for large-scale electric energy storage in recent years due to their highest theoretical specific energy density of 3450 Wh kg −1 [1][2][3][4][5][6][7]. However, the practical applications of this system are still constrained by substantial issues, such as high charge-discharge overpotentials, serious electrolyte decomposition, and short cell lifespan [8][9][10][11]. Moreover, a large number of experimental results have demonstrated that most of these problems are caused by the insulating nature of the discharge product Li 2 O 2 and the sluggish kinetics of the oxygen reduction/evolution reactions (ORR/OER) [5,12].…”

Section: Introductionmentioning

confidence: 99%

A High-Performance Li-O2/Air Battery System with Dual Redox Mediators in the Hydrophobic Ionic Liquid-Based Gel Polymer Electrolyte

Feng

Wang

et al. 2023

Batteries

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Lithium–oxygen (Li-O2) batteries have captured worldwide attention owing to their highest theoretical specific energy density. However, this promising system still suffers from huge discharge/charge overpotentials and poor cycling stability, which are related to the leakage/volatilization of organic liquid electrolytes and the inefficiency of solid catalysts. A mixing ionic liquid-based gel polymer electrolyte (IL-GPE)-based Li-O2 battery, consisting of a 20 mM 2,5-di-tert-butyl-1,4-benzoquinone (DBBQ) 40 mM N-methylphenothiazine (MPT)-containing IL-GPE and a single-walled carbon nanotube cathode, is designed for the first time here. This unique dual redox mediators-based GPE, which contains a polymer matrix immersed with mixed ionic liquid electrolyte, provides a proper ionic conductivity (0.48 mS cm−1) and effective protection for lithium anode. In addition, DBBQ, as the catalyst for an oxygen reduction reaction, can support the growth of discharge products through the solution–phase pathway. Simultaneously, MPT, as the catalyst for an oxygen evolution reaction, can decompose Li2O2 at low charge overpotentials. Hence, the DBBQ-MPT-IL-GPE-based Li-O2 battery can operate for 100 cycles with lower charge/discharge overpotentials. This investigation may offer a promising method to realize high-efficiency Li-O2/air batteries.

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Sustainable, economic, and simple preparation of an efficient catalyst for Li–O2 batteries

Cited by 5 publications

References 46 publications

A Grafted Hybrid Nanosheet Array Architecture Enables Efficient Bifunctional Oxygen Catalytic Electrodes for Rechargeable Lithium−Oxygen Batteries

A Grafted Hybrid Nanosheet Array Architecture Enables Efficient Bifunctional Oxygen Catalytic Electrodes for Rechargeable Lithium−Oxygen Batteries

Efficient Biorenewable Membranes in Lithium-Oxygen Batteries

A High-Performance Li-O2/Air Battery System with Dual Redox Mediators in the Hydrophobic Ionic Liquid-Based Gel Polymer Electrolyte

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