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Air-Stable Na3.5C6O6 as a Sodium Compensation Additive in Cathode of Na-Ion Batteries.
Cao, Mengyan; Xu, Liang; Guo, Yujie; Li, Yixin; Fang, Qiu; Liu, Yuan; Bai, Rui; Zhu, Jiacheng; Gao, Yurui; Cheng, Tao; Li, Jifang; Wang, Xuefeng; Guo, Yuguo; Wang, Zhaoxiang; Chen, Liquan.
  • Cao M; Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China.
  • Xu L; College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing, 100190, China.
  • Guo Y; Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, China.
  • Li Y; CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
  • Fang Q; Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China.
  • Liu Y; School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, 100190, China.
  • Bai R; Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China.
  • Zhu J; College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing, 100190, China.
  • Gao Y; Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China.
  • Cheng T; College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing, 100190, China.
  • Li J; Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China.
  • Wang X; School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, 100190, China.
  • Guo Y; Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China.
  • Wang Z; College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing, 100190, China.
  • Chen L; Laboratory of Theoretical and Computational Nanoscience, National Center for Nanoscience and Technology, Chinese Academy of Sciences, Beijing, 100190, China.
Small ; : e2400498, 2024 Jun 11.
Article en En | MEDLINE | ID: mdl-38863125
ABSTRACT
Sodium-ion battery (SIB) is a candidate for the stationary energy storage systems because of the low cost and high abundance of sodium. However, the energy density and lifespan of SIBs suffer severely from the irreversible consumption of the Na-ions for the formation of the solid electrolyte interphase (SEI) layer and other side reactions on the electrodes. Here, Na3.5C6O6 is proposed as an air-stable high-efficiency sacrificial additive in the cathode to compensate for the lost sodium. It is characteristic of low desodiation (oxidation) potential (3.4-3.6 V vs. Na+/Na) and high irreversible desodiation capacity (theoretically 378 mAh g-1). The feasibility of using Na3.5C6O6 as a sodium compensation additive is verified with the improved electrochemical performances of a Na2/3Ni1/3Mn1/3Ti1/3O2ǀǀhard carbon cells and cells using other cathode materials. In addition, the structure of Na3.5C6O6 and its desodiation path are also clarified on the basis of comprehensive physical characterizations and the density functional theory (DFT) calculations. This additive decomposes completely to supply abundant Na ions during the initial charge without leaving any electrochemically inert species in the cathode. Its decomposition product C6O6 enters the carbonate electrolyte without bringing any detectable negative effects. These findings open a new avenue for elevating the energy density and/or prolonging the lifetime of the high-energy-density secondary batteries.
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Texto completo: 1 Banco de datos: MEDLINE Idioma: En Año: 2024 Tipo del documento: Article

Texto completo: 1 Banco de datos: MEDLINE Idioma: En Año: 2024 Tipo del documento: Article