Effect of Na₃BO₃ Addition into Na₃V₂(PO₄)₃ Single-Phase All-Solid-State Batteries

• NISHIO Akira

  Interdisciplinary Graduate School of Engineering Sciences, Kyushu University

• SHIRAI Nobuaki

  Interdisciplinary Graduate School of Engineering Sciences, Kyushu University

• MINAMI Hironari

  Suzuki Motor Corporation, Automobile Electrical Design Department

• IZUMI Hiroaki

  Suzuki Motor Corporation, Automobile Electrical Design Department

• INOISHI Atsushi

  Institute for Materials Chemistry and Engineering, Kyushu University

• OKADA Shigeto

  Institute for Materials Chemistry and Engineering, Kyushu University

抄録

To reduce the interfacial resistance between the electrodes and electrolyte in all solid-state battery, we have recently suggested the idea of a single-phase all-solid-state battery that is made from a single material with the three roles of electrolyte, positive electrode and negative electrode. In this research, the effects of Na₃BO₃ addition into Na₃V₂(PO₄)₃ were investigated with respect to the electrochemical properties. Na₃BO₃ addition improved the relative density of Na₃V₂(PO₄)₃ by acting as a flux to fill the voids of the sintered body, as confirmed by scanning electron microscopy (SEM) observations. The electrical conductivity is increased by the addition of Na₃BO₃, although the activation energy is also increased. Charge/discharge measurement revealed that Na₃V₂(PO₄)₃+Na₃BO₃ pellets exhibit improved cyclability and optical observation indicated a different mechanism for the in-situ formation of the electrode from a Na₃V₂(PO₄)₃ pellet.

収録刊行物

• Electrochemistry

  Electrochemistry 89 (3), 244-249, 2021-05-05

  公益社団法人　電気化学会

キーワード

• Single-phase
• All-solid-state Batteries
• Na-ion Batteries
• NASICON

詳細情報

• CRID: 1390569390874801152
• NII論文ID: 130008034694
• DOI: 10.5796/electrochemistry.21-00023
• ISSN: 21862451
• ISSN: 13443542
• Web Site: https://www.jstage.jst.go.jp/article/electrochemistry/89/3/89_21-00023/_pdf
• 本文言語コード: en
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