Flexible Zinc–Air Batteries with Ampere‐Hour Capacities and Wide‐Temperature Adaptabilities

Advanced Materials, Год журнала: 2023, Номер 35(13)

Опубликована: Янв. 30, 2023

Flexible Zn-air batteries (FZABs) have significant potentials as efficient energy storage devices for wearable electronics because of their safeties and high energy-to-cost ratios. However, application is limited by short cycle lives, low discharge capacities per cycle, charge/discharge polarizations. Accordingly, herein, a poly(sodium acrylate)-polyvinyl alcohol (PANa-PVA)-ionic liquid (IL) hydrogel (PANa-PVA-IL) prepared using hygroscopic IL, 1-ethyl-3-methylimidazolium chloride, an additive twin-chain PANa-PVA. PANa-PVA-IL exhibits conductivity 306.9 mS cm-1 water uptake 2515 wt% at room temperature. Moreover, low-cost bifunctional catalyst, namely, Co9 S8 nanoparticles anchored on N- S-co-doped activated carbon black pearls 2000 (Co9 -NSABP), synthesized, which demonstrates O2 reversibility potential gap 0.629 V. FZABs based -NSABP demonstrate 1.67 mAh cm-2 long lives 330 h. Large-scale flexible rechargeable pouch cells exhibit total 1.03 Ah densities 246 Wh kgcell-1 . This study provides new information about hydrogels with ionic conductivities uptakes should facilitate the in electronics.

Язык: Английский

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In Situ Immobilizing Atomically Dispersed Ru on Oxygen-Defective Co₃O₄ for Efficient Oxygen Evolution

ACS Catalysis, Год журнала: 2023, Номер 13(4), С. 2462 - 2471

Опубликована: Фев. 2, 2023

The synergistic regulation of the electronic structures transition-metal oxide-based catalysts via oxygen vacancy defects and single-atom doping is efficient to boost their evolution reaction (OER) performance, which remains challenging due complex synthetic procedures. Herein, a facile defect-induced in situ deposition strategy developed anchor atomically dispersed Ru onto vacancy-rich cobalt oxides (Ru/Co3O4–x) based on spontaneous redox between Ru3+ ions nonstoichiometric Co3O4–x. Accordingly, as-prepared Ru/Co3O4–x electrocatalyst with coexistence vacancies atoms exhibits excellent performances toward OER low overpotential 280 mV at 10 mA cm–2, small Tafel slope value 86.9 dec–1, good long-term stability alkaline media. Furthermore, density functional theory calculations uncover that could synergistically tailor electron decentralization d-band center Co atoms, further optimizing adsorption oxygen-based intermediates (*OH, *O, *OOH) reducing barriers OER. This work proposes an available for constructing electrocatalysts abundant noble metal presents deep understanding engineering transition-metal-based evolution.

Язык: Английский

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Accurate Potentials of Hg/HgO Electrodes: Practical Parameters for Reporting Alkaline Water Electrolysis Overpotentials

ACS Catalysis, Год журнала: 2023, Номер 13(3), С. 1893 - 1898

Опубликована: Янв. 18, 2023

ADVERTISEMENT RETURN TO ISSUEPREVViewpointNEXTAccurate Potentials of Hg/HgO Electrodes: Practical Parameters for Reporting Alkaline Water Electrolysis OverpotentialsKenta KawashimaKenta KawashimaDepartment Chemistry, The University Texas at Austin, 78712, United StatesMore by Kenta Kawashimahttps://orcid.org/0000-0001-7318-6115, Raúl A. MárquezRaúl MárquezDepartment Márquezhttps://orcid.org/0000-0003-3885-5007, Yoon Jun SonYoon SonMcKetta Department Chemical Engineering, Sonhttps://orcid.org/0000-0003-1704-2314, Clarissa GuoClarissa GuoMcKetta Guo, Rinish Reddy VaidyulaRinish VaidyulaDepartment Vaidyula, Lettie SmithLettie SmithDepartment Smithhttps://orcid.org/0000-0003-0378-072X, Chikaodili E. ChukwunekeChikaodili ChukwunekeDepartment Chukwunekehttps://orcid.org/0000-0003-0478-8387, and C. Buddie Mullins*C. MullinsDepartment StatesMcKetta StatesTexas Materials Institute, StatesCenter Electrochemistry, StatesH2@UT, States*E-mail: [email protected]More Mullinshttps://orcid.org/0000-0003-1030-4801Cite this: ACS Catal. 2023, 13, 3, 1893–1898Publication Date (Web):January 18, 2023Publication History Received17 November 2022Published online18 January 2023Published inissue 3 February 2023https://pubs.acs.org/doi/10.1021/acscatal.2c05655https://doi.org/10.1021/acscatal.2c05655article-commentaryACS PublicationsCopyright © 2023 American Society. This publication is available under these Terms Use. Request reuse permissions free to access through this site. Learn MoreArticle Views23402Altmetric-Citations12LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum full text article downloads since 2008 (both PDF HTML) across all institutions individuals. These metrics regularly updated reflect usage leading up last few days.Citations number other articles citing article, calculated Crossref daily. Find more information about citation counts.The Altmetric Attention Score a quantitative measure attention that research has received online. Clicking on donut icon will load page altmetric.com with additional details score social media presence given article. how calculated. Share Add toView InAdd Full Text ReferenceAdd Description ExportRISCitationCitation abstractCitation referencesMore Options onFacebookTwitterWechatLinked InRedditEmail (2 MB) Get e-AlertscloseSupporting Info (1)»Supporting Information Supporting SUBJECTS:Electrodes,Electrolytes,Evolution reactions,Liquids,Solution chemistry e-Alerts

Язык: Английский

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Robust Electronic Correlation of Co‐CoN₄ Hybrid Active Sites for Durable Rechargeable Zn‐Air Batteries

Advanced Functional Materials, Год журнала: 2022, Номер 32(52)

Опубликована: Окт. 10, 2022

Abstract The rational design of bifunctional catalysts with excellent activity and stability toward the oxygen evolution reaction (OER) reduction (ORR) is essential for rechargeable Zn‐air batteries (ZABs). In this study, a facile coordination bridging strategy proposed to construct Co‐CoN 4 hybrid active sites embedded in porous N‐rich carbon nanolamellas (denoted as @NCNs) both ORR OER. Synchrotron X‐ray absorption spectroscopy density functional theory calculations reveal that increased intrinsic ORR/OER activities can be attributed efficient interfacial charge transfer between atomic CoN metallic Co due their robust electronic correlation. situ Raman confirms OER depends on CoOOH intermediates formed during reaction. @NCNs exhibits superior catalytic performance ( E 1/2 = 0.83 V) (η 310 mV at 10 mA cm −2 ) conducted alkaline media. assembled @NCNs‐based ZAB displays an open‐circuit voltage 1.47 V, peak power 118.8 mW , specific capacity 776.7 mAh g −1 outstanding cycling over 1500 cycles. regulation properties contribute electrocatalysts used metal‐air batteries.

Язык: Английский

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Opportunities for biocompatible and safe zinc-based batteries

Energy & Environmental Science, Год журнала: 2022, Номер 15(12), С. 4911 - 4927

Опубликована: Янв. 1, 2022

This review presents the recent progress and research potential of biocompatible ZBs for wearable implantable devices. Challenges solutions have been discussed future investigations, followed by roadmaps towards biocompatibility.

Язык: Английский

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Carbon-based electrocatalysts for rechargeable Zn–air batteries: design concepts, recent progress and future perspectives

Energy & Environmental Science, Год журнала: 2023, Номер 17(2), С. 386 - 424

Опубликована: Ноя. 22, 2023

This review provides an in-depth discussion of the carbon-based electrocatalysts for rechargeable Zn–air batteries from design strategies, research progress, and future perspectives.

Язык: Английский

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Electronic modulation induced by decorating single-atomic Fe-Co pairs with Fe-Co alloy clusters toward enhanced ORR/OER activity

Applied Catalysis B Environment and Energy, Год журнала: 2023, Номер 340, С. 123231 - 123231

Опубликована: Авг. 29, 2023

Язык: Английский

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Ultralong nitrogen/sulfur Co‐doped carbon nano‐hollow‐sphere chains with encapsulated cobalt nanoparticles for highly efficient oxygen electrocatalysis

Carbon Energy, Год журнала: 2023, Номер 5(8)

Опубликована: Янв. 11, 2023

Abstract The development of simple and effective strategies to prepare electrocatalysts, which possess unique stable structures comprised metal/nonmetallic atoms for oxygen reduction reaction (ORR) evolution (OER), is currently an urgent issue. Herein, efficient bifunctional electrocatalyst featured by ultralong N, S‐doped carbon nano‐hollow‐sphere chains about 1300 nm with encapsulated Co nanoparticles (Co‐CNHSCs) developed. multifunctional catalytic properties together the heteroatom‐induced charge redistribution (i.e., modulating electronic structure active site) result in superior activities toward OER ORR alkaline media. optimized catalyst Co‐CNHSC‐3 displays outstanding electrocatalytic ability OER, a high specific capacity 1023.6 mAh g Zn −1 , excellent reversibility after 80 h at 10 mA cm −2 Zn‐air battery system. This work presents new strategy design synthesis carbon‐based catalysts energy storage conversion devices.

Язык: Английский

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Multi‐Channel Hollow Carbon Nanofibers with Graphene‐Like Shell‐Structure and Ultrahigh Surface Area for High‐Performance Zn‐Ion Hybrid Capacitors

Small Methods, Год журнала: 2023, Номер 7(11)

Опубликована: Авг. 4, 2023

Porous carbon is the most promising cathode material for Zn-ion hybrid capacitors (ZIHCs), but limited by insufficient active adsorption sites and slow ion diffusion kinetics during charge storage. Herein, a pore construction-pore expansion strategy synthesizing multi-channel hollow nanofibers (MCHCNF) proposed, in which sacrificial template-induced structure eliminates barrier enhancing kinetics, generated ultrahigh surface area high-density defective structures effectively increase quantity of Additionally, graphene-like shell formed on nanofiber facilitates fast electron transport, highly matchable size MCHCNF with electrolyte-ions favors accommodation carriers. These advantages lead to optimized ZIHCs exhibit high capacity (191.4 mAh g

Язык: Английский

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Integrating V-doped CoP on Ti3C2Tx MXene-incorporated hollow carbon nanofibers as a freestanding positrode and MOF-derived carbon nanotube negatrode for flexible supercapacitors

Chemical Engineering Journal, Год журнала: 2023, Номер 475, С. 146351 - 146351

Опубликована: Сен. 30, 2023

Язык: Английский

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