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dc.contributor.author Kunjuzwa, Niki
dc.contributor.author Kebede, Mesfin A
dc.contributor.author Mathe, Mkhulu K
dc.contributor.author Modibedi, Remegia M
dc.date.accessioned 2019-08-28T09:34:01Z
dc.date.available 2019-08-28T09:34:01Z
dc.date.issued 2019-05
dc.identifier.citation Kunjuzwa, N., Kebede, M.A., Mathe, M.K. & Modibedi, R.M. 2019. The effect of nickel precursors on the electrochemical properties of spinel LiMn2-xNixO4 cathode: A comparative study ofNi(NO3)2·6H2O and NiSO4·6H2O as nickel sources. Materials Research Express, vol 6, pp. 1-10 en_US
dc.identifier.issn 2053-1591
dc.identifier.uri https://doi.org/10.1088/2053-1591/ab1e16
dc.identifier.uri https://iopscience.iop.org/article/10.1088/2053-1591/ab1e16
dc.identifier.uri http://hdl.handle.net/10204/11113
dc.description Copyright: 2019 IOP Publishing. Due to copyright restrictions, the attached PDF file contains the abstract version of the full-text item. For access to the full-text item, please consult the publisher's website. The definitive version of the work is published in Materials Research Express, vol 6, pp. 1-10. https://iopscience.iop.org/article/10.1088/2053-1591/ab1e16 en_US
dc.description.abstract A comparative study was carried out with the effect of nickel precursors on the electrochemical performance of spinel LiMn2−x Ni x O4 (x = 0, 0.1 and 0.2) cathode materials. The spinel materials were prepared by employing a low temperature aqueous reduction synthesis route using locally sourced low-cost manganese precursor electrolytic manganese dioxide (EMD), and Ni(NO3)2centerdot6H2O as a nickel source. The EDS result has confirmed that the use of nickel nitrate provides more nickel content in the synthesized samples as compared to using nickel sulphate as a nickel source. Importantly, LiMn1.9Ni0.1O4 prepared with the nitrate salt showed the low impedance value (~294.7 Ω) than that of the nickel sulphate used spinel (~431.8 Ω), inferring that the nitrate salt generates low resistance in the spinel. The improved conductivity was observed with the small amount of nickel in both precursor used spinel, nickel salt used spinel showed high electrical conductivity (225.4 Ω) than the sulphate salt (330.7 Ω). A small amount of nickel addition showed the significant enhancement in capacity retention of LiMn1.9Ni0.1O4 and LiMn1.8Ni0.2O4 by retaining 88% and 145% of its initial capacity for nickel salt used spinel and the sulphate salt used spinel showed 83% and 92% of its initial capacity, respectively whereas the pristine LiMn2O4 showed only 56% of its initial capacity. The investigation clearly indicates that the substitution of small amounts of nickel into the spinel, irrespective of the precursor used effectively reduces the Jahn-Teller effects in the LiMn2O4. en_US
dc.language.iso en en_US
dc.publisher IOP Publishing en_US
dc.relation.ispartofseries Workflow;22494
dc.subject Capacity retention en_US
dc.subject LiMn2-xNixO4 en_US
dc.subject Lithium ion battery en_US
dc.subject Nickel nitrate en_US
dc.subject Nickel sulphate en_US
dc.title The effect of nickel precursors on the electrochemical properties of spinel LiMn2-xNixO4 cathode: a comparative study ofNi(NO3)2·6H2O and NiSO4·6H2O as nickel sources en_US
dc.type Article en_US


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