【公開日：2024.07.25】【最終更新日：2024.05.24】
課題データ / Project Data
課題番号 / Project Issue Number
23NM5537
利用課題名 / Title
元素戦略電池の実現に資する革新材料の研究開発
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）物質・材料合成プロセス/Molecule & Material Synthesis
【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
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)
万代 俊彦
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
Omar Falyouna
ARIM実施機関支援担当者 / Names of Collaborators in The Hub and Spoke Institutes
岩撫暁生
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)
Transition metal chalcogenides are potential candidate materials for magnesium battery positive electrodes. However, the Mg2+ storage performance of one representative compound MoS2 was evaluated basically by in-direct methods in the preceding works, so its capability remains unclear. In this study, we conducted ICP-OES measurements on MoS2 samples before and after battery cycling to ensure the species/elements contributed to the observed capacities.
実験 / Experimental
MoS2 electrodes were prepared by standard slurry coating methods. The battery cell was fabricated using MoS2 and Mg electrodes, and the charge-discharge measurements were performed for the prepared cells. After measurements, the processed MoS2 electrodes were retrieved from the cell, washed, dried under vacuum, then subjected to ICP-OES measurements.
結果と考察 / Results and Discussion
The Mg element in addition to based Mo and S elements was detected. The amount of Mg elements is however somewhat lower/higher than that expected from the delivered capacities, suggesting that undesired side-reactions are associated with Mg2+ storage during discharge/charge reactions, respectively. Incorporation of Li in electrolyte was found to be effective to enhance the Mg2+ storage performance.
The manuscript containing the ICP-OES results is now under reviewing.
図・表・数式 / Figures, Tables and Equations
Table 1. Molar content of Mg and Li in MgxLiyMoS2 after discharging.
その他・特記事項（参考文献・謝辞等） / Remarks(References and Acknowledgements)
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