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题名: Synthesis and Electrochemical Properties of Two-Dimensional Hafnium Carbide
作者: Zhou, Jie1, 2;  Zha, Xianhu1;  Zhou, Xiaobing1;  Chen, Fanyan1;  Gao, Guoliang3;  Wang, Shuwei3;  Shen, Cai3;  Chen, Tao1;  Zhi, Chunyi4;  Eklund, Per5;  Du, Shiyu1;  Xue, Jianming6, 7;  Shi, Weiqun8, 9;  Chai, Zhifang8, 9;  Huang, Qing1
关键词: MXenes ;  selective etching ;  2D materials ;  DFT calculations ;  electrochemical properties
刊名: ACS NANO
发表日期: 2017-04-01
DOI: 10.1021/acsnano.7b00030
卷: 11, 期:4, 页:3841-3850
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Multidisciplinary ;  Chemistry, Physical ;  Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science
英文摘要: We demonstrate fabrication of a two-dimensional Hf-containing MXene, Hf3C2Tz, by selective etching of a layered parent Hf-3[Al(Si)](4)C-6 compound. A substitutional solution of Si on Al sites effectively weakened the interfacial adhesion between Hf-C and Al(Si)-C sublayers within the unit cell of the parent compound, facilitating the subsequent selective etching. The underlying mechanism of the Si-alloying-facilitated etching process is thoroughly studied by first-principles density functional calculations. The result showed that more valence electrons of Si than Al weaken the adhesive energy of the etching interface. The MXenes were determined to be flexible and conductive. Moreover, this 2D Hf-containing MXene material showed reversible volumetric capacities of 1567 and 504 mAh cm(-3) for lithium and sodium ions batteries, respectively, at a current density of 200 mAg(-1) after 200 cycles. Thus, Hf3C2Tz MXenes with a 2D structure are candidate anode materials for metal-ion intercalation, especially for applications where size matters.
关键词[WOS]: TRANSITION-METAL CARBIDES ;  HIGH VOLUMETRIC CAPACITANCE ;  2D TITANIUM CARBIDE ;  LI-ION BATTERIES ;  ENERGY-STORAGE ;  MECHANICAL-PROPERTIES ;  MOLYBDENUM CARBIDE ;  SURFACE-STRUCTURE ;  LAYERED CARBIDES ;  MAX PHASE
语种: 英语
WOS记录号: WOS:000400233200042
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/151955
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Ningbo Inst Mat Engn & Technol, Engn Lab Specialty Fibers & Nucl Energy Mat, Ningbo 315201, Zhejiang, Peoples R China
2.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Ningbo Inst Mat Engn & Technol, Energy Storage Div, Ningbo 315201, Zhejiang, Peoples R China
4.City Univ Hong Kong, Dept Phys & Mat Sci, Kowloon, Hong Kong, Peoples R China
5.Linkoping Univ, IFM, Thin Film Phys Div, S-58183 Linkoping, Sweden
6.Peking Univ, CAPT, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China
7.Peking Univ, IFSA Collaborat Innovat Ctr, MoE, Beijing 100871, Peoples R China
8.Chinese Acad Sci, Inst High Energy Phys, Lab Nucl Energy Chem, Beijing 100049, Peoples R China
9.Chinese Acad Sci, Inst High Energy Phys, Key Lab Biomed Effects Nanomat & Nanosafety, Beijing 100049, Peoples R China

Recommended Citation:
Zhou, Jie,Zha, Xianhu,Zhou, Xiaobing,et al. Synthesis and Electrochemical Properties of Two-Dimensional Hafnium Carbide[J]. ACS NANO,2017,11(4):3841-3850.
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