【公開日：2025.06.10】【最終更新日：2025.04.07】
課題データ / Project Data
課題番号 / Project Issue Number
24NM5354
利用課題名 / Title
Research on battery materials
利用した実施機関 / Support Institute
物質・材料研究機構 / NIMS
機関外・機関内の利用 / External or Internal Use
内部利用（ARIM事業参画者以外）/Internal Use (by non ARIM members)
技術領域 / Technology Area
【横断技術領域 / Cross-Technology Area】（主 / Main）計測・分析/Advanced Characterization（副 / Sub）-
【重要技術領域 / Important Technology Area】（主 / Main）革新的なエネルギー変換を可能とするマテリアル/Materials enabling innovative energy conversion（副 / Sub）-
キーワード / Keywords
誘導結合プラズマ発光分光/ Inductively coupled plasma emission spectroscopy,電極材料/ Electrode material,エネルギー貯蔵/ Energy storage,二次電池/ Secondary battery
利用者と利用形態 / User and Support Type
利用者名（課題申請者）/ User Name (Project Applicant)
ユ デニス ヤウワイ
所属名 / Affiliation
物質・材料研究機構
共同利用者氏名 / Names of Collaborators in Other Institutes Than Hub and Spoke Institutes
岩撫 暁生
ARIM実施機関支援担当者 / Names of Collaborators in The Hub and Spoke Institutes
利用形態 / Support Type
（主 / Main）技術代行/Technology Substitution（副 / Sub）-
利用した主な設備 / Equipment Used in This Project
報告書データ / Report
概要（目的・用途・実施内容）/ Abstract (Aim, Use Applications and Contents)
To study the degradation mechanism of cathode materials for lithium-ion batteries
実験 / Experimental
Battery electrodes are charged and discharged with different number of cycles in different electrolytes with Li counter electrodes. The Li anode and the separator are then extracted from the batteries and dissolved in acid. The amount of transition metal in the solution is measured by inductively-coupled plasma spectroscopy
結果と考察 / Results and Discussion
Transition metal dissolution is one of the degradation mechanisms of metal oxides cathode materials in lithium-ion batteries. The amount of transition metal dissolution depends on the type of electrolyte, the charge-discharge conditions and also cycle number. In this study, we found that higher transition metal is dissolved from the electrode increases with the number cycles, and also depends on the amount of cyclic carbonate in the electrolyte, suggesting side reactions between the cyclic carbonate and the material. The amount of transition metal dissolution is also higher when the cut off voltage is higher, which correlates with more parasitic reactions of the electrolyte.
図・表・数式 / Figures, Tables and Equations
その他・特記事項（参考文献・謝辞等） / Remarks(References and Acknowledgements)
N/A
成果発表・成果利用 / Publication and Patents
論文・プロシーディング（DOIのあるもの） / DOI (Publication and Proceedings)
口頭発表、ポスター発表および、その他の論文 / Oral Presentations etc.
特許 / Patents
特許出願件数 / Number of Patent Applications：0件
特許登録件数 / Number of Registered Patents：0件