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Cathode-Electrolyte Interface Modification by Binder Engineering for High-Performance Aqueous Zinc-Ion Batteries.
Dong, Haobo; Liu, Ruirui; Hu, Xueying; Zhao, Fangjia; Kang, Liqun; Liu, Longxiang; Li, Jianwei; Tan, Yeshu; Zhou, Yongquan; Brett, Dan J L; He, Guanjie; Parkin, Ivan P.
Afiliação
  • Dong H; Christopher Ingold Laboratory, Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK.
  • Liu R; Electrochemical Innovation Lab, Department of Chemical Engineering, University College London, 20 Gordon Street, London, WC1E 7JE, UK.
  • Hu X; Key Laboratory of Comprehensive and Highly Efficient Util, Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Chinese Academy of Sciences, Xining, Qinghai, 810008, China.
  • Zhao F; Christopher Ingold Laboratory, Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK.
  • Kang L; Christopher Ingold Laboratory, Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK.
  • Liu L; Materials and Catalysis Laboratory, Department of Chemical Engineering, University College London, London, WC1E 7JE, UK.
  • Li J; Christopher Ingold Laboratory, Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK.
  • Tan Y; Christopher Ingold Laboratory, Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK.
  • Zhou Y; Christopher Ingold Laboratory, Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK.
  • Brett DJL; Key Laboratory of Comprehensive and Highly Efficient Util, Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Chinese Academy of Sciences, Xining, Qinghai, 810008, China.
  • He G; Electrochemical Innovation Lab, Department of Chemical Engineering, University College London, 20 Gordon Street, London, WC1E 7JE, UK.
  • Parkin IP; Electrochemical Innovation Lab, Department of Chemical Engineering, University College London, 20 Gordon Street, London, WC1E 7JE, UK.
Adv Sci (Weinh) ; 10(5): e2205084, 2023 Feb.
Article em En | MEDLINE | ID: mdl-36526590
ABSTRACT
A stable cathode-electrolyte interface (CEI) is crucial for aqueous zinc-ion batteries (AZIBs), but it is less investigated. Commercial binder poly(vinylidene fluoride) (PVDF) is widely used without scrutinizing its suitability and cathode-electrolyte interface (CEI) in AZIBs. A water-soluble binder is developed that facilitated the in situ formation of a CEI protecting layer tuning the interfacial morphology. By combining a polysaccharide sodium alginate (SA) with a hydrophobic polytetrafluoroethylene (PTFE), the surface morphology, and charge storage kinetics can be confined from diffusion-dominated to capacitance-controlled processes. The underpinning mechanism investigates experimentally in both kinetic and thermodynamic perspectives demonstrate that the COO- from SA acts as an anionic polyelectrolyte facilitating the adsorption of Zn2+ ; meanwhile fluoride atoms on PTFE backbone provide hydrophobicity to break desolvation penalty. The hybrid binder is beneficial in providing a higher areal flux of Zn2+ at the CEI, where the Zn-Birnessite MnO2 battery with the hybrid binder exhibits an average specific capacity 45.6% higher than that with conventional PVDF binders; moreover, a reduced interface activation energy attained fosters a superior rate capability and a capacity retention of 99.1% in 1000 cycles. The hybrid binder also reduces the cost compared to the PVDF/NMP, which is a universal strategy to modify interface morphology.
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2023 Tipo de documento: Article
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2023 Tipo de documento: Article