Scholarlink

<p>In this study, in-situ X-ray absorption fine structure (XAFS) measurements were conducted on amorphous Li<sub>3</sub>PO<sub>4</sub>-doped V<sub>2</sub>O<sub>5</sub> (VO-LPO) cathode in an all-solid-state thin-film lithium-ion battery to observe the behavior of Li ions during charge/discharge. The thin-film lithium-ion battery was fabricated by sputtering deposition and consisted of an amorphous multilayer structure with VO-LPO, LiPON, and Si as cathode, electrolyte, and anode, respectively. In X-ray absorption near edge structure (XANES) measurements, the energy shift of the Vanadium K-edge indicated that the valence of V changed from 4.64 to 5.11 in the cathode during charge/discharge processes. This result indicates that Li ions were removed and inserted into the amorphous VO-LPO cathode layer. The pre-edge peak intensity also increased during charging and decreased during discharging. Additionally, extended X-ray absorption fine structure (EXAFS) measurements indicated that the V-O bond distance shifted during charge/discharge process. From these measurements, we clearly observed that the coordination symmetry and structure around V in the amorphous VO-LPO cathode changed with the charge/discharge reaction.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

In-situ XAFS measurements of amorphous Li3PO4-doped V2O5 cathode for all-solid-state thin-film Li-ion batteries

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年4月25日

查看全文
  • Keisuke Omosako,
  • Takeshi Watanabe,
  • Satoshi Ogawa,
  • Isaku Kanno

摘要

In this study, in-situ X-ray absorption fine structure (XAFS) measurements were conducted on amorphous Li3PO4-doped V2O5 (VO-LPO) cathode in an all-solid-state thin-film lithium-ion battery to observe the behavior of Li ions during charge/discharge. The thin-film lithium-ion battery was fabricated by sputtering deposition and consisted of an amorphous multilayer structure with VO-LPO, LiPON, and Si as cathode, electrolyte, and anode, respectively. In X-ray absorption near edge structure (XANES) measurements, the energy shift of the Vanadium K-edge indicated that the valence of V changed from 4.64 to 5.11 in the cathode during charge/discharge processes. This result indicates that Li ions were removed and inserted into the amorphous VO-LPO cathode layer. The pre-edge peak intensity also increased during charging and decreased during discharging. Additionally, extended X-ray absorption fine structure (EXAFS) measurements indicated that the V-O bond distance shifted during charge/discharge process. From these measurements, we clearly observed that the coordination symmetry and structure around V in the amorphous VO-LPO cathode changed with the charge/discharge reaction.