MOF-74 derived porous hybrid metal oxide hollow nanowires for high-performance electrochemical energy storage

被引：106

作者：

Yu, Cuiping ^{[1
]}

Wang, Yan ^{[1
,2
]}

Cui, Jiewu ^{[1
,2
,4
]}

Yu, Dongbo ^{[1
,2
]}

Zhang, Xinyi ^{[3
]}

Shu, Xia ^{[1
,2
]}

Zhang, Jianfang ^{[1
]}

Zhang, Yong ^{[1
,2
]}

Vajtai, Robert ^{[4
]}

Ajayan, Pulickel M. ^{[4
]}

Wu, Yucheng ^{[1
,2
]}

机构：

[1] Hefei Univ Technol, Sch Mat Sci & Engn, Hefei 230009, Anhui, Peoples R China

[2] Key Lab Adv Funct Mat & Devices Anhui Prov, Hefei 230009, Anhui, Peoples R China

[3] Monash Univ, Sch Chem, Clayton, Vic 3800, Australia

[4] Rice Univ, Dept Mat Sci & Nanoengn, Houston, TX 77005 USA

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2018年 / 6卷 / 18期

基金：

中国国家自然科学基金;

关键词：

ORGANIC FRAMEWORK; FUNCTIONAL-GROUPS; NANOSHEETS; ARRAYS; SUPERCAPACITORS; NANOCAGES; FACILE; ZIF-8;

D O I：

10.1039/c8ta01426d

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Metal-organic framework-derived materials have attracted much attention due to their great potential for applications in energy storage and conversion. Herein, we report a rational design and organic solvent-free synthesis of MOF-74 and derived hybrid metal oxide nanowires with hollow structure. The evolution process and mechanism of MOF-74 have been investigated by adjusting solvent compositions and Ni/Co ratios. Different phases of metal oxide nanowires can be tailored after calcinations, enabling the systematic investigation of the effect of different metal species counts on the electrochemical properties of hybrid metal oxide nanomaterials. Results indicate that the hybrid metal oxides exhibit obvious advantages compared with monometallic oxides of Co3O4 and NiO, and NiO/NiCo2O4 (1 : 1) with two mixed phases of NiCo2O4 and NiO exhibits a superior specific capacity of 732.0C g(-1) at a current density of 1 A g(-1) among three different hybrid metal oxides. Furthermore, an assembled asymmetric supercapacitor device achieves a high specific energy density of 46.9 W h kg(-1) at a specific power density of 425.3 W kg(-1) with excellent cycling performance. The as-prepared materials will be competitive and promising candidates for electrochemical energy storage and other applications.

引用

页码：8396 / 8404

页数：9

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