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Multi-functional NiS2/FeS2/N-doped carbon nanorods derived from metal-organic frameworks with fast reaction kinetics for high performance overall water splitting and lithium-ion batteries
Shanghai Univ, Peoples R China.
Shanghai Univ, Peoples R China.
Shanghai Univ, Peoples R China.
Shanghai Univ, Peoples R China.
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2019 (English)In: Journal of Power Sources, ISSN 0378-7753, E-ISSN 1873-2755, Vol. 436, article id 226857Article in journal (Refereed) Published
Abstract [en]

The development of cost-effective, highly efficient and robust multi-functional electrode materials can dramatically reduce the overall cost of electrochemical devices. We here report the controlled synthesis of NiS2/FeS2 nanoparticles encapsulated in N-doped carbon nanorods (NiS2/FeS2/NC) through carbonization and sulfurization of Fe/Ni-based bimetallic metal-organic frameworks. Benefiting from both structural and compositional characteristics, the resulting NiS2/FeS2/NC nanorods possess abundant active sites, high electrical conductivity and rapid mass transfer, thereby delivering 10 and 20 mA cm(-2) at overpotential of 172 mV and 231 mV towards the hydrogen evolution reaction and oxygen evolution reaction with robust stability in 1.0 M KOH solution, respectively. When employed as a bifunctional electrocatalyst for overall water splitting, it requires only 1.58 V to deliver a current density of 10 mA cm(-2) in 1.0 M KOH, outperforming that of the commercial Pt/C parallel to RuO2. Additionally, lithium-ion batteries tests also show high reversible capacity (718 mA h g(-1) at 100 mA g(-1)) and excellent cycling stability and rate performance. The work in this paper not only provides a promising strategy for designing efficient multi-functional electrode materials with similar morphology and structure, but also can be extended to the synthesis of other mixed metal sulfides for energy conversion and storage.

Place, publisher, year, edition, pages
ELSEVIER , 2019. Vol. 436, article id 226857
Keywords [en]
Metal-organic frameworks; Sulfide; Water splitting; Lithium-ion batteries; Energy storage
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:liu:diva-160387DOI: 10.1016/j.jpowsour.2019.226857ISI: 000483408400047OAI: oai:DiVA.org:liu-160387DiVA, id: diva2:1353582
Note

Funding Agencies|National Natural Science Foundation of China [21601120, 21805181, 21771124]; Science and Technology Commission of Shanghai Municipality [17ZR1410500, 17ZR1441200, 18QA1402400, 18230743400, 19ZR1418100]; China Postdoctoral Science Foundation [2017M611529]

Available from: 2019-09-23 Created: 2019-09-23 Last updated: 2019-09-23

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Molecular Surface Physics and Nano ScienceFaculty of Science & Engineering
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