Download file (4.93MB)
Download as zip (4.47MB)

コレクション

引用

説明:

Cation-disordered rocksalt oxides offer broad compositional flexibility and high theoretical capacities, but their electrochemical performance is often limited by uncontrolled competition between transition-metal and oxygen redox processes. In particular, controlling the balance between Mn and O redox activity remains a key challenge in Mn-based disordered oxides.
Here, a previously unexplored compositional space in the Li–Mn–Mo–O system is investigated, revealing that Mo incorporation systematically alters the electronic structure and redox behavior of Mn-based disordered rocksalt oxides. Mo doping lowers the average Mn oxidation state, thereby stabilizing a Mn-dominated charge compensation mechanism. Combined spectroscopic characterization and first-principles calculations reveal a shift in charge compensation from oxygen-centered to Mn-centered redox processes with Mo doping. As a result, Li1.25Mn0.5Mo0.25O2 delivers a reversible capacity exceeding 300 mAh g−¹ with enhanced electrochemical stability.
These findings demonstrate that targeted compositional and electronic-structure modulation enables effective control of redox pathways in cation-disordered oxides and offers design principles for stable, high-capacity Mn-based cathode materials.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: Manganese-Based Disordered Rocksalt Cathodes, Li-rich cathode materials, Cathode materials for Solid-state batteries

刊行年月日: 2026-06-09

出版者: American Chemical Society (ACS)

掲載誌:

• Chemistry of Materials (ISSN: 08974756) vol. 38 issue. 11 p. 5579-5587

研究助成金:

• Ministry of Education, Culture, Sports, Science and Technology JPMXP0219207397
• Japan Society for the Promotion of Science JP21K14729
• Japan Science and Technology Agency JPMJGX23S2

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1021/acs.chemmater.6c00304

関連資料:

その他の識別子:

連絡先:

更新時刻: 2026-07-10 10:06:40 +0900

MDRでの公開時刻: 2026-07-10 12:26:36 +0900