Growth of Ni3Se2 nanosheets on Ni foam for asymmetric supercapacitors

Growth of Ni3Se2 nanosheets on Ni foam for asymmetric supercapacitors We present a facile one-step hydrothermal method to in situ grow nickel selenide (Ni3Se2) nanosheets on nickel (Ni) foam (Ni3Se2/Ni) by using SeO2 as selenide source, Ni foam as nickel source and NaBH4 as reducing agent. The mole ratio of NaBH4/SeO2 is optimized as 4:1. An asymmetric supercapacitor (ASC) is fabricated by using as synthesized Ni3Se2/Ni as positive electrode and activated carbon (AC) as negative electrode. The synthesized materials and assembled devices are measured and characterized by a field emission scanning electron microscopy, powder X-ray diffraction, cyclic voltammetry, galvanostatic charge–discharge, and electrochemical impedance spectroscopy. The results shows that the as-synthesized Ni3Se2/Ni electrode possesses a high specific capacitance of 854 F g−1 at 1 A g−1. The ASC can steadily operate with a high voltage of 1.6 V in 3 M KOH electrolytes, and possesses a superior energy density of 23.3 W h kg−1 at a power density of 398.1 W kg−1. In addition, the Ni3Se2//AC ASC shows excellent charge/discharge stability, after 5000 cycles the capacitance retention reaches 91.11%. The excellent performance of Ni3Se2/Ni electrode is mainly due to the pseudo-capacitive by Ni3Se2 and the 3D structure of Ni foam. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Materials Science: Materials in Electronics Springer Journals

Growth of Ni3Se2 nanosheets on Ni foam for asymmetric supercapacitors

Loading next page...
 
/lp/springer_journal/growth-of-ni3se2-nanosheets-on-ni-foam-for-asymmetric-supercapacitors-fJ3RcmRsHD
Publisher
Springer Journals
Copyright
Copyright © 2017 by Springer Science+Business Media, LLC, part of Springer Nature
Subject
Materials Science; Optical and Electronic Materials; Characterization and Evaluation of Materials
ISSN
0957-4522
eISSN
1573-482X
D.O.I.
10.1007/s10854-017-8416-y
Publisher site
See Article on Publisher Site

Abstract

We present a facile one-step hydrothermal method to in situ grow nickel selenide (Ni3Se2) nanosheets on nickel (Ni) foam (Ni3Se2/Ni) by using SeO2 as selenide source, Ni foam as nickel source and NaBH4 as reducing agent. The mole ratio of NaBH4/SeO2 is optimized as 4:1. An asymmetric supercapacitor (ASC) is fabricated by using as synthesized Ni3Se2/Ni as positive electrode and activated carbon (AC) as negative electrode. The synthesized materials and assembled devices are measured and characterized by a field emission scanning electron microscopy, powder X-ray diffraction, cyclic voltammetry, galvanostatic charge–discharge, and electrochemical impedance spectroscopy. The results shows that the as-synthesized Ni3Se2/Ni electrode possesses a high specific capacitance of 854 F g−1 at 1 A g−1. The ASC can steadily operate with a high voltage of 1.6 V in 3 M KOH electrolytes, and possesses a superior energy density of 23.3 W h kg−1 at a power density of 398.1 W kg−1. In addition, the Ni3Se2//AC ASC shows excellent charge/discharge stability, after 5000 cycles the capacitance retention reaches 91.11%. The excellent performance of Ni3Se2/Ni electrode is mainly due to the pseudo-capacitive by Ni3Se2 and the 3D structure of Ni foam.

Journal

Journal of Materials Science: Materials in ElectronicsSpringer Journals

Published: Dec 19, 2017

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create lists to
organize your research

Export lists, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off