TiC3は,ナトリウムイオン電池のための高特異容量単層である
Tong Yu1, Ziyuan Zhao1, Lulu Liu1
1Centre for Advanced Optoelectronic Functional Materials Research and Key Laboratory for UV Light-Emitting Materials and Technology of Ministry of Education , Northeast Normal University , Changchun 130024 , China.
Journal of the American Chemical Society
|April 26, 2018
まとめ
研究者らは,ナトリウムイオン電池 (SIB) の有望な陽極として金属のTiC3単層を発見した. この材料は高い記憶容量と優れた伝導性を備えており,SIBの開発における主要な制約を克服しています.
科学分野:
- 材料科学
- 電気化学
- コンピュータ化学
背景:
- ナトリウムイオン電池 (SIB) は,リチウムイオン電池よりも安全性と豊富な利点を提供しています.
- SIBの開発の重要なボトルネックは,高性能アノド材料の不足です.
研究 の 目的:
- ナトリウムイオン電池のための新しいアノド材料を特定し,計算的に調査する.
- SIB のアノドとして二次元材料の可能性を評価する.
主な方法:
- 構造を予測するスワームインテリジェンスを使った最初の原理の計算.
- 電子構造,エネルギーバリア,安定性を分析するための密度関数理論 (DFT).
- ナトリウム吸収と貯蔵能力の評価
主要な成果:
- 金属のTiC3単層は,理論的には1278 mA hg-1という高い容量を持つ理想的なアノド材料として特定された.
- TiC3はナトリウム吸収/脱吸収エネルギーバリアが低く,ナトリウム吸収後に金属伝導性を維持する.
- 材料は高熱と動的安定性を示し,強力な凝固エネルギーは合成の実現可能性を示しています.
結論:
- TiC3単層は,高性能SIBアノードの有望な候補である.
- 独特の電子構造と結合特性により,優れた電気化学的特性があります.
- 酸素などの機能化は,低エネルギーバリアを維持しながら,さらに容量を増やすことができます.
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