The use of zeolite-templated carbon as a positive electrode material for lithium ion secondary battery
| Project/Area Number |
15H01999
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Nanomaterials chemistry
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| Research Institution | Tohoku University |
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Principal Investigator |
Kyotani Takashi 東北大学, 多元物質科学研究所, 教授 (90153238)
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| Co-Investigator(Kenkyū-buntansha) |
西原 洋知 東北大学, 多元物質科学研究所, 准教授 (80400430)
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| Project Period (FY) |
2015-04-01 – 2019-03-31
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| Project Status |
Completed (Fiscal Year 2018)
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| Budget Amount *help |
¥41,340,000 (Direct Cost: ¥31,800,000、Indirect Cost: ¥9,540,000)
Fiscal Year 2018: ¥7,150,000 (Direct Cost: ¥5,500,000、Indirect Cost: ¥1,650,000)
Fiscal Year 2017: ¥10,920,000 (Direct Cost: ¥8,400,000、Indirect Cost: ¥2,520,000)
Fiscal Year 2016: ¥11,440,000 (Direct Cost: ¥8,800,000、Indirect Cost: ¥2,640,000)
Fiscal Year 2015: ¥11,830,000 (Direct Cost: ¥9,100,000、Indirect Cost: ¥2,730,000)
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| Keywords | ゼオライト鋳型炭素 / リチウムイオン二次電池 / 正極材料 / カーボンエッジサイト / 電気化学的安定性 / 単層グラフェン / リチウムイオンキャパシタ / 電気化学キャパシタ / リチウムイオン電池 / 正極 / 多孔質炭素 / 電気化学 / 含酸素官能基 |
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| Outline of Final Research Achievements |
Zeolite-templated carbon (ZTC) is characterized by the presence of a large number of edge sites. In this study, electrochemical redox sites such quinone groups are introduced into these edge sites and the resulting chemical modified ZTC is applied to the active material for a positive electrode with large capacity and high current density in lithium ion secondary battery. As a result, the effective introduction of quinone groups is achieved, but we have found that such groups do not work as a redox-active site. Instead, we demonstrate that furan-type ethers in ZTC function as such an electrochemically active site in a relatively high electric potential range. Moreover, our study reveals how carbon surface chemistry influences the electrochemical stability of carbon materials and we have succeeded in the synthesis of a large-surface area porous carbon having almost no edge sites using the template method.
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| Academic Significance and Societal Importance of the Research Achievements |
リチウムイオン二次電池は電気自動車の電池としてはエネルギー密度がまだまだ小さく、とくに正極容量の向上が強く求められている。今まで正極材料としてはコバルトやニッケル等が使用されてきたが、本研究では我々が開発したゼオライト鋳型炭素を正極材料として応用した。その結果、炭素材料であっても、その構造を分子レベルで制御すれば高容量の正極材料になる可能性があることを示した。とくに、炭素材料の場合は水素含有量を減らすとともに電気化学的に安定な酸化還元サイトを導入することが重要であることを具体的に明らかにしており、今後の高容量正極材料開発の指針となり得る。
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Report
(5 results)
Research Products
(25 results)
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[Journal Article] Oxidation-Resistant and Elastic Mesoporous Carbon with Single-Layer Graphene Walls2016
Author(s)
Hirotomo Nishihara, Tomoya Simura, Shunsuke Kobayashi, Keita Nomura, Raul Berenguer, Masashi Ito, Masanobu Uchimura, Hiroshi Iden, Kazuki Arihara, Atsushi Ohma, Yuichiro Hayasaka, Takashi Kyotani
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Journal Title
Adv. Funct. Mater.
Volume: 26
Issue: 35
Pages: 6418-6427
DOI
Related Report
Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
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[Journal Article] Pseudocapacitance of Zeolite-Templated Carbon in Organic Electrolytes2015
Author(s)
Khanin Nueangnoraj, Hirotomo Nishihara, Takafumi Ishii, Norihisa Yamamoto, Hiroyuki Itoi, Raúl Berenguer, Ramiro Ruiz-Rosas, Diego Cazorla-Amorós, Emilia Morallón, Masashi Ito, Takashi Kyotani
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Journal Title
Energy Storage Materials
Volume: 1
Pages: 35-41
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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