Construction of surface lattice oxygen in metallic N−CuCoS1.97 porous nanowire for wearable Zn−air battery

Yin, Jie; Wei, Baodian; Li, Yuxuan; Li, Yefei; Xi, Pinxian

doi:10.1016/j.jechem.2018.09.012

Cited by 16 publications

(5 citation statements)

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“…[ 5,20,22–24 ] Transition metal oxides with metal sites and tunable oxygen vacancies (V O ) have been studied as OER catalysts. [ 3,19,25 ] Additionally, controlling the morphology of oxides to further improve their catalytic performance is a promising way to synthesize excellent catalysts. 2D materials with high surface area and abundant inherent active edge sites have received much attention for various reactions.…”

Section: Figurementioning

confidence: 99%

NiCo₂O₄‐Based Nanosheets with Uniform 4 nm Mesopores for Excellent Zn–Air Battery Performance

et al. 2020

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evolution and oxygen reduction reaction (OER and ORR) performance of the air cathode limits the efficiency of Zn-air batteries owing to the sluggish kinetics and multistep proton-coupled electron transfer process on the catalyst surface. [4-6] Anode passivation typically reduces the performance of Zn-air batteries in hard alkaline electrolytes. Moreover, aqueous electrolytes limit the temperature range of the Zn-air battery applications. [7,8] Several strategies, such as the preparation of superior catalysts with remarkable OER and ORR activity and excellent stability, [9-12] the design of new Zn-air battery systems in facile media (such as natural conditions), [13-15] and tailoring the electrolyte properties to achieve a wide temperature range for Zn-air battery applications, [7,8,16-18] have been developed to address these problems and enhance the performance of Zn-air batteries. Although many efforts have been dedicated to increasing the use of Zn-air battery in different fields, the current performance of the Zn-air batteries is still unsatisfactory utilizations in many fields, particularly under low temperature condition. The performance of Zn-air batteries depends on the bifunctional catalytic activity of the air-cathode electrode. Typically, noble Herein, a strategy is reported for the fabrication of NiCo 2 O 4-based mesoporous nanosheets (PNSs) with tunable cobalt valence states and oxygen vacancies. The optimized NiCo 2.148 O 4 PNSs with an average Co valence state of 2.3 and uniform 4 nm nanopores present excellent catalytic performance with an ultralow overpotential of 190 mV at a current density of 10 mA cm −2 and long-term stability (700 h) for the oxygen evolution reaction (OER) in alkaline media. Furthermore, Zn-air batteries built using the NiCo 2.148 O 4 PNSs present a high power and energy density of 83 mW cm −2 and 910 Wh kg −1 , respectively. Moreover, a portable battery box with NiCo 2.148 O 4 PNSs as the air cathode presents long-term stability for 120 h under low temperatures in the range of 0 to −35 °C. Density functional theory calculations reveal that the prominent electron exchange and transfer activity of the electrocatalyst is attributed to the surface lower-coordinated Co-sites in the porous region presenting a merging 3d-e g-t 2g band, which overlaps with the Fermi level of the Zn-air battery system. This favors the adsorption of the *OH, and stabilized *O radicals are reached, toward competitively lower overpotential, demonstrating a generalized key for optimally boosting overall OER performance. Zn-air batteries, as a promising alternative to fossil fuel, have received much attention owing to their safety, cleanliness, and efficiency. [1-3] However, Zn-air batteries still present shortcomings for large-scale applications, as follows. The oxygen The ORCID identification number(s) for the author(s) of this article can be found under

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Section: Figurementioning

confidence: 99%

NiCo₂O₄‐Based Nanosheets with Uniform 4 nm Mesopores for Excellent Zn–Air Battery Performance

et al. 2020

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“…In addition to the heteroatom doping, bimetal or trimetal cobalt sulfides can enhance the ORR/OER catalytic activity [ 157 ] because different metals provide more donor–acceptor chemisorption sites allowing reversible adsorption/desorption of oxygen molecules. [ 158 ] Recently, a series of such bifunctional electrocatalysts have been reported, such as NiCoMnS 4 /N‐rGO, [ 159 ] N‐CuCoS 1.97 NWs, [ 160 ] S‐GNS/NiCo 2 S 4 , [ 161 ] NiCo 2 S 4 /Co 9 S 8 microcubes, [ 162 ] (Ni,Co)S 2 , [ 163 ] Zn−Co−S NS, [ 164 ] Co 0.5 Fe 0.5 S@N‐MC, [ 165 ] NiCo 2 S 4 /N‐CNT, [ 166 ] and Co−Ni−S@NSPC. [ 167 ] Among them, Liu designed an urchin‐like NiCo 2 S 4 microsphere integrated with S‐doped graphene nanosheets (S‐GNS/NiCo 2 S 4 ) ( Figure a−c), [ 161 ] exhibiting a high half‐wave potential of 0.88 V (vs RHE) for ORR and a low OER potential of 1.56 V at 10 mA cm −2 .…”

Section: Cobalt‐based Electrocatalystsmentioning

confidence: 99%

Cobalt‐Based Electrocatalysts as Air Cathodes in Rechargeable Zn–Air Batteries: Advances and Challenges

et al. 2021

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Rechargeable Zn–air batteries (ZABs) are efficient devices for renewable energy conversion and storage. One of the bottlenecks of current ZAB technology lies in the lack of robust and cost‐effective catalysts for effectively driving oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) reactions simultaneously at air electrodes. Owing to the high intrinsic catalytic activity, low cost, and abundant reserves, cobalt (Co)‐based nanomaterials have become one of the most promising bifunctional oxygen electrocatalysts. Recently, considerable efforts have been devoted to developing high‐performance ZABs by using Co‐based compounds as cathodes. Herein, the recent progress of Co‐based electrocatalysts in ZABs is covered in four categories, including cobalt chalcogenides, cobalt oxides, Co‐based layered double hydroxides (LDHs), and Co–N–C structures. In each category, synthesis approaches and modification strategies are illustrated, and the structure–performance relationships are discussed. To conclude, a brief summary of current achievements and challenges is provided, and a prospect for future explorations is proposed.

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“…This step will speed up the publication process by an average of 7 weeks. The first ABP article [8] has been published in Vol. 34, 2019, with the immediately assigned page numbers 1-9.…”

Section: Changesmentioning

confidence: 99%

Journal of Energy Chemistry in its 6th anniversary

Gao

Zhang

2019

Journal of Energy Chemistry

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Construction of surface lattice oxygen in metallic N−CuCoS1.97 porous nanowire for wearable Zn−air battery

Cited by 16 publications

References 63 publications

NiCo₂O₄‐Based Nanosheets with Uniform 4 nm Mesopores for Excellent Zn–Air Battery Performance

NiCo₂O₄‐Based Nanosheets with Uniform 4 nm Mesopores for Excellent Zn–Air Battery Performance

Cobalt‐Based Electrocatalysts as Air Cathodes in Rechargeable Zn–Air Batteries: Advances and Challenges

Journal of Energy Chemistry in its 6th anniversary

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Construction of surface lattice oxygen in metallic N−CuCoS1.97 porous nanowire for wearable Zn−air battery

Cited by 16 publications

References 63 publications

NiCo2O4‐Based Nanosheets with Uniform 4 nm Mesopores for Excellent Zn–Air Battery Performance

NiCo2O4‐Based Nanosheets with Uniform 4 nm Mesopores for Excellent Zn–Air Battery Performance

Cobalt‐Based Electrocatalysts as Air Cathodes in Rechargeable Zn–Air Batteries: Advances and Challenges

Journal of Energy Chemistry in its 6th anniversary

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NiCo₂O₄‐Based Nanosheets with Uniform 4 nm Mesopores for Excellent Zn–Air Battery Performance

NiCo₂O₄‐Based Nanosheets with Uniform 4 nm Mesopores for Excellent Zn–Air Battery Performance