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Growth of LiNi0.5Mn1.5O4 crystals on reduced graphene oxide sheets for high energy and power density charge storage

Spinel-type lithium manganates are actively considered to develop cost-effective energy/charge storage devices. In this article, we show the growth of LiNi0.5Mn1.5O4 nanocrystals on reduced graphene oxide (rGO) sheets, which offer impressive improvements in their charge storage capability than that...

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Main Authors: Gajraj, V., Rajan, Jose, Mariappan, Chinnasamy Ramaraj
Format: Article
Language:English
Published: Elsevier 2020
Subjects:
TP Chemical technology
Online Access:http://umpir.ump.edu.my/id/eprint/27775/1/Growth%20of%20LiNi0.5Mn1.5O4%20crystals%20on%20reduced%20graphene%20oxide.pdf
http://umpir.ump.edu.my/id/eprint/27775/
https://doi.org/10.1016/j.materresbull.2019.110742
https://doi.org/10.1016/j.materresbull.2019.110742
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spelling my.ump.umpir.277752021-01-15T08:18:59Z http://umpir.ump.edu.my/id/eprint/27775/ Growth of LiNi0.5Mn1.5O4 crystals on reduced graphene oxide sheets for high energy and power density charge storage Gajraj, V. Rajan, Jose Mariappan, Chinnasamy Ramaraj TP Chemical technology Spinel-type lithium manganates are actively considered to develop cost-effective energy/charge storage devices. In this article, we show the growth of LiNi0.5Mn1.5O4 nanocrystals on reduced graphene oxide (rGO) sheets, which offer impressive improvements in their charge storage capability than that can be achieved using bare LiNi0.5Mn1.5O4 nanocrystals. X-ray diffraction, Raman spectroscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy and electron microscopy techniques are employed to demonstrate the embedment of LiNi0.5Mn1.5O4 particles on rGO sheets. As a single electrode, LiNi0.5Mn1.5O4-rGO composite electrode deliver ∼3-fold enhanced charge storability (∼572 F g−1 /∼175 mA h g-1 at 3.75 A g-1) in 5 M LiNO3 electrolyte than the bare LiNi0.5Mn1.5O4 electrode. The electrochemical charge storage processes are investigated via the Dunn’s approach. The major charge storage mechanism of the samples is diffusion controlled at slow scan rate. A practical hybrid battery – supercapacitor device is fabricated in the LiNi0.5Mn1.5O4-rGO//activated carbon configuration, which deliver energy density in the 60 – 23 Wh kg-1 range at a power density in the 1.2−13 kW kg-1 range with an output voltage of 0–2.0 V, excellent cycling stability, and rate capability. Elsevier 2020-04 Article PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/27775/1/Growth%20of%20LiNi0.5Mn1.5O4%20crystals%20on%20reduced%20graphene%20oxide.pdf Gajraj, V. and Rajan, Jose and Mariappan, Chinnasamy Ramaraj (2020) Growth of LiNi0.5Mn1.5O4 crystals on reduced graphene oxide sheets for high energy and power density charge storage. Materials Research Bulletin, 128 (110742). p. 1. ISSN 0025-5408 https://doi.org/10.1016/j.materresbull.2019.110742 https://doi.org/10.1016/j.materresbull.2019.110742
institution Universiti Malaysia Pahang
building UMP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Pahang
content_source UMP Institutional Repository
url_provider http://umpir.ump.edu.my/
language English
topic TP Chemical technology
spellingShingle TP Chemical technology
Gajraj, V.
Rajan, Jose
Mariappan, Chinnasamy Ramaraj
Growth of LiNi0.5Mn1.5O4 crystals on reduced graphene oxide sheets for high energy and power density charge storage
description Spinel-type lithium manganates are actively considered to develop cost-effective energy/charge storage devices. In this article, we show the growth of LiNi0.5Mn1.5O4 nanocrystals on reduced graphene oxide (rGO) sheets, which offer impressive improvements in their charge storage capability than that can be achieved using bare LiNi0.5Mn1.5O4 nanocrystals. X-ray diffraction, Raman spectroscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy and electron microscopy techniques are employed to demonstrate the embedment of LiNi0.5Mn1.5O4 particles on rGO sheets. As a single electrode, LiNi0.5Mn1.5O4-rGO composite electrode deliver ∼3-fold enhanced charge storability (∼572 F g−1 /∼175 mA h g-1 at 3.75 A g-1) in 5 M LiNO3 electrolyte than the bare LiNi0.5Mn1.5O4 electrode. The electrochemical charge storage processes are investigated via the Dunn’s approach. The major charge storage mechanism of the samples is diffusion controlled at slow scan rate. A practical hybrid battery – supercapacitor device is fabricated in the LiNi0.5Mn1.5O4-rGO//activated carbon configuration, which deliver energy density in the 60 – 23 Wh kg-1 range at a power density in the 1.2−13 kW kg-1 range with an output voltage of 0–2.0 V, excellent cycling stability, and rate capability.
format Article
author Gajraj, V.
Rajan, Jose
Mariappan, Chinnasamy Ramaraj
author_facet Gajraj, V.
Rajan, Jose
Mariappan, Chinnasamy Ramaraj
author_sort Gajraj, V.
title Growth of LiNi0.5Mn1.5O4 crystals on reduced graphene oxide sheets for high energy and power density charge storage
title_short Growth of LiNi0.5Mn1.5O4 crystals on reduced graphene oxide sheets for high energy and power density charge storage
title_full Growth of LiNi0.5Mn1.5O4 crystals on reduced graphene oxide sheets for high energy and power density charge storage
title_fullStr Growth of LiNi0.5Mn1.5O4 crystals on reduced graphene oxide sheets for high energy and power density charge storage
title_full_unstemmed Growth of LiNi0.5Mn1.5O4 crystals on reduced graphene oxide sheets for high energy and power density charge storage
title_sort growth of lini0.5mn1.5o4 crystals on reduced graphene oxide sheets for high energy and power density charge storage
publisher Elsevier
publishDate 2020
url http://umpir.ump.edu.my/id/eprint/27775/1/Growth%20of%20LiNi0.5Mn1.5O4%20crystals%20on%20reduced%20graphene%20oxide.pdf
http://umpir.ump.edu.my/id/eprint/27775/
https://doi.org/10.1016/j.materresbull.2019.110742
https://doi.org/10.1016/j.materresbull.2019.110742
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score 13.211869

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