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http://hdl.handle.net/10397/64531
Title: | Ni@NiO core/shell dendrites for ultra-long cycle life electrochemical energy storage | Authors: | Liu, Y Fu, NQ Zhang, GG Lu, W Zhou, LM Huang, HT |
Issue Date: | 2016 | Source: | Journal of materials chemistry A, 2016, v. 4, no. 39, p. 15049-15056 | Abstract: | A dendritic Ni@NiO core/shell electrode (DNE) is successfully fabricated by electrodeposition in a Ni-free electrolyte, with a Ni anode providing Ni ions through dissolution and diffusion. The unique structure is ideal for electrochemical energy storage since the dendrites provide a large surface area for easy electrolyte infiltration; the metal core improves the electrode conductivity with a shortened ion diffusion path, and the metal oxide shell is active for faradaic charge storage. As a result, the synthesized DNE demonstrates a high specific capacitance of 1930 F g(-1) and a high areal capacitance of 1.35 F cm(-2), with super-long cycle stability. The gravimetric capacitance of the DNE hardly shows any decay after 70 000 cycles at a scan rate of 100 mV s(-1). It was also demonstrated that our electrodeposition method in a source-free electrolyte is universal to deposit dendritic Ni-compounds on many other types of substrates, versatile for different applications. | Publisher: | Royal Society of Chemistry | Journal: | Journal of materials chemistry A | ISSN: | 2050-7488 | EISSN: | 2050-7496 | DOI: | 10.1039/c6ta05508g | Rights: | The article is licensed under a Creative Commons Attribution 3.0 Unported (CC BY 3.0) <https://creativecommons.org/licenses/by-nc/3.0/> |
Appears in Collections: | Journal/Magazine Article |
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c6ta05508g.pdf | 1.48 MB | Adobe PDF | View/Open |
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