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Double-layered yolk-shell microspheres with NiCo2S4-Ni9S8-C hetero-interfaces as advanced battery-type electrode for hybrid supercapacitors
Yan, Yu1; Li, Anran2; Lu, Chengxing1; Zhai, Tengfei1; Lu, Shanfu3; Li, Weiman4; Zhou, Wei1
2020-09-15
Source PublicationCHEMICAL ENGINEERING JOURNAL
ISSN1385-8947
Volume396Pages:11
AbstractIt requires excellent conductivity, rapid diffusion of electrolyte and high active specific area of active materials to achieve efficient supercapacitor. Herein, the novel NiCo2S4-Ni9S8-C double-layered yolk-shell microspheres (NiCo2S4Ni9S8-C DYMs) were synthesized by using bimetallic metal-organic framework (MOF) as self-template. The microspheres are composed of numerous tiny heterogeneous NiCo2S4-Ni9S8 nanoparticles (similar to 10 nm in size) decorated in amorphous carbon. As expected, the sample exhibits high specific capacity of 293.6 mAh g(-1) at 1 A g(-1), excellent rate capacity (81.1% from 1 A g(-1) to 20 A g(-1)) and good cycling stability (capacity retention of 87.3% over 5000 cycles). The hybrid supercapacitor assembled by NiCo2S4-Ni9S8-C DYMs and grapheme hydrogel, shows an energy density of 51 Wh kg(-1) at a power density of 1399.4 W kg(-1) and even can retain 32.5 Wh kg(-1) at 8004.4 W kg(-1). The density functional theory (DFT) calculation show the hetero-interfaces of NiCo2S4-Ni9S8 can optimize the electronic distribution, coupled with the excellent electroconductivity of dispersed carbon within microspheres, which boost the electrochemical performance. This work provides an approach to fabricate heterogeneous microspheres by MOF route for developing advanced battery-type electrode materials.
KeywordMetal-organic framework Double-layered yolk-shell microspheres NiCo2S4-Ni9S8-C hetero-interfaces Battery-type electrode Hybrid supercapacitor
DOI10.1016/j.cej.2020.125316
Language英语
WOS KeywordULTRATHIN NANOSHEETS ; TEMPLATE SYNTHESIS ; HOLLOW SPHERES ; PERFORMANCE ; CARBON ; STORAGE ; ENERGY ; ARRAYS
Funding ProjectNational Natural Science Foundation of China[51622204] ; National Natural Science Foundation of China[51972011] ; National Natural Science Foundation of China[51902012]
WOS Research AreaEngineering
WOS SubjectEngineering, Environmental ; Engineering, Chemical
Funding OrganizationNational Natural Science Foundation of China
WOS IDWOS:000551969200120
PublisherELSEVIER SCIENCE SA
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/41477
Corresponding AuthorZhou, Wei
Affiliation1.Beihang Univ, Beijing Adv Innovat Ctr Biomed Engn, Sch Chem, Beijing 100191, Peoples R China
2.Beihang Univ, Beijing Adv Innovat Ctr Big Data Based Precis Med, Beijing 100191, Peoples R China
3.Beihang Univ, Sch Space & Environm, Beijing 100191, Peoples R China
4.Chinese Acad Sci, Inst Proc Engn, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Yan, Yu,Li, Anran,Lu, Chengxing,et al. Double-layered yolk-shell microspheres with NiCo2S4-Ni9S8-C hetero-interfaces as advanced battery-type electrode for hybrid supercapacitors[J]. CHEMICAL ENGINEERING JOURNAL,2020,396:11.
APA Yan, Yu.,Li, Anran.,Lu, Chengxing.,Zhai, Tengfei.,Lu, Shanfu.,...&Zhou, Wei.(2020).Double-layered yolk-shell microspheres with NiCo2S4-Ni9S8-C hetero-interfaces as advanced battery-type electrode for hybrid supercapacitors.CHEMICAL ENGINEERING JOURNAL,396,11.
MLA Yan, Yu,et al."Double-layered yolk-shell microspheres with NiCo2S4-Ni9S8-C hetero-interfaces as advanced battery-type electrode for hybrid supercapacitors".CHEMICAL ENGINEERING JOURNAL 396(2020):11.
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