2017年5月
Enhanced Li-Ion Accessibility in MXene Titanium Carbide by Steric Chloride Termination
ADVANCED ENERGY MATERIALS
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- 巻
- 7
- 号
- 9
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1002/aenm.201601873
- 出版者・発行元
- WILEY-V C H VERLAG GMBH
Pseudocapacitance is a key charge storage mechanism to advanced electrochemical energy storage devices distinguished by the simultaneous achievement of high capacitance and a high charge/discharge rate by using surface redox chemistries. MXene, a family of layered compounds, is a pseudocapacitor-like electrode material which exhibits charge storage through exceptionally fast ion accessibility to redox sites. Here, the authors demonstrate steric chloride termination in MXene Ti2CTx (T-x: surface termination groups) to open the interlayer space between the individual 2D Ti2CTx units. The open interlayer space significantly enhances Li-ion accessibility, leading to high gravimetric and volumetric capacitances (300 F g(-1) and 130 F cm(-3)) with less diffusion limitation. A Li-ion hybrid capacitor consisting of the Ti2CTx negative electrode and the LiNi1/3Co1/3Mn1/3O2 positive electrode displays an unprecedented specific energy density of 160 W h kg(-1) at 220 W kg(-1) based on the total weight of positive and negative active materials.
- リンク情報
- ID情報
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- DOI : 10.1002/aenm.201601873
- ISSN : 1614-6832
- eISSN : 1614-6840
- ORCIDのPut Code : 34137017
- Web of Science ID : WOS:000401719900004