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Molecular Crowding Electrolytes for Stable Proton Batteries.
Wu, Sicheng; Chen, Junbo; Su, Zhen; Guo, Haocheng; Zhao, Tingwen; Jia, Chen; Stansby, Jennifer; Tang, Jiaqi; Rawal, Aditya; Fang, Yu; Ho, Junming; Zhao, Chuan.
Afiliación
  • Wu S; School of Chemistry, Faculty of Science, University of New South Wales, Sydney, New South Wales, 2052, Australia.
  • Chen J; School of Chemistry, Faculty of Science, University of New South Wales, Sydney, New South Wales, 2052, Australia.
  • Su Z; School of Chemistry, Faculty of Science, University of New South Wales, Sydney, New South Wales, 2052, Australia.
  • Guo H; School of Chemistry, Faculty of Science, University of New South Wales, Sydney, New South Wales, 2052, Australia.
  • Zhao T; School of Chemistry, Faculty of Science, University of New South Wales, Sydney, New South Wales, 2052, Australia.
  • Jia C; School of Chemistry, Faculty of Science, University of New South Wales, Sydney, New South Wales, 2052, Australia.
  • Stansby J; School of Chemistry, Faculty of Science, University of New South Wales, Sydney, New South Wales, 2052, Australia.
  • Tang J; Key Laboratory of Applied Surface and Colloid Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710062, P. R. China.
  • Rawal A; Mark Wainwright Analytical Centre, University of New South Wales, Sydney, New South Wales, 2052, Australia.
  • Fang Y; Key Laboratory of Applied Surface and Colloid Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710062, P. R. China.
  • Ho J; School of Chemistry, Faculty of Science, University of New South Wales, Sydney, New South Wales, 2052, Australia.
  • Zhao C; School of Chemistry, Faculty of Science, University of New South Wales, Sydney, New South Wales, 2052, Australia.
Small ; 18(45): e2202992, 2022 11.
Article en En | MEDLINE | ID: mdl-36156409
Proton electrochemistry is promising for developing post-lithium energy storage devices with high capacity and rate capability. However, some electrode materials are vulnerable because of the co-intercalation of free water molecules in traditional acid electrolytes, resulting in rapid capacity fading. Here, the authors report a molecular crowding electrolyte with the usage of poly(ethylene glycol) (PEG) as a crowding agent, achieving fast and stable electrochemical proton storage and expanded working potential window (3.2 V). Spectroscopic characterisations reveal the formation of hydrogen bonds between water and PEG molecules, which is beneficial for confining the activity of water molecules. Molecular dynamics simulations confirm a significant decrease of free water fraction in the molecular crowding electrolyte. Dynamic structural evolution of the MoO3 anode is studied by in-situ synchrotron X-ray diffraction (XRD), revealing a reversible multi-step naked proton (de)intercalation mechanism. Surficial adsorption of PEG molecules on MoO3 anode works in synergy to alleviate the destructive effect of concurrent water desolvation, thereby achieving enhanced cycling stability. This strategy offers possibilities of practical applications of proton electrochemistry thanks to the low-cost and eco-friendly nature of PEG additives.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Suministros de Energía Eléctrica / Protones Idioma: En Revista: Small Asunto de la revista: ENGENHARIA BIOMEDICA Año: 2022 Tipo del documento: Article País de afiliación: Australia Pais de publicación: Alemania
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Suministros de Energía Eléctrica / Protones Idioma: En Revista: Small Asunto de la revista: ENGENHARIA BIOMEDICA Año: 2022 Tipo del documento: Article País de afiliación: Australia Pais de publicación: Alemania