DataVXACS Applied Energy MaterialsPaper
journal article·2020-05-26

Capacity Improvement by Nitrogen Doping to Lithium-Rich Cathode Materials with Stabilization Effect of Oxide Ions Redox

Aruto Watanabe, Kentaro Yamamoto, Tomoki Uchiyama, Toshiyuki Matsunaga, Akitoshi Hayashi, Kazuhiko Maeda, Hiroshi Kageyama, Yoshiharu Uchimoto

ACS Applied Energy Materials· Volume 3· Issue 5
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Source abstract

Abstract

Lithium-rich cathode materials show higher theoretical capacity than conventional cathode materials because the redox activity of oxide ions in addition to the transition metal valence change contributes charge compensation during charge/discharge reactions. In this study, we prepared nitrogen-doped lithium-rich cathode materials, Li1.2Ti0.4Mn0.4O2, by using mechanical milling with Li3N. The optimized nitrogen-doped Li1.2Ti0.4Mn0.4O1.85N0.10 showed higher first charge capacity of 350 mAh g–1 than that of the non-nitrogen-doped Li1.2Ti0.4Mn0.4O2 of 300 mAh g–1. Soft X-ray absorption spectroscopy indicated that the extra capacity was contributed to by both Mn valence change and oxide ions redox.
Source: openalex_inverted_index · Quality: baseline

Research context

Energy storage

OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Supercapacitor Materials and Fabrication

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Graduate School of Human and Environmental Studies, Kyoto University, Yoshida-nihommatsu-cho, Sakyo-ku, Kyoto 606-8501, Japan

Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuencho, Naka-ku, Sakai, Osaka 599-8531, Japan

Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-NE-2, Ookayama, Meguro-ku, Tokyo 152-8551, Japan

The Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Kyoto-daigaku-katsura, Nishigyo-ku, Kyoto 615-8510, Japan

Funding

Japan Society for the Promotion of Science

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