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A Facile Chemical Precipitation Method for the Synthesis of Nd(OH)(3) and La(OH)(3) Nanopowders and their Supercapacitor Performances

2019/1/9 9:48:27

author:Arunachalam, S., et al.

journal:Chemistryselect

volume:3

Issue:45

A facile chemical precipitation method is used to prepare both lanthanum hydroxide [La(OH)(3)] and neodymium hydroxide [Nd(OH)(3)] nanopowders in an ambient temperature without the addition of any surfactants. Both rare-earth hydroxides nanopowders are characterized by X-ray diffraction and FE-SEM analysis. The supercapacitor performances of La(OH)(3) and Nd(OH)(3) electrodes are studied by cyclic voltammetry, electrochemical AC-impedance and galvanostatic charge-discharge studies. It revealed that Nd(OH)(3) electrode possesses a high specific capacitance (C-sp) than La(OH)(3) electrode. Hence, an asymmetric supercapacitor device is fabricated and denoted as Nd(OH)(3)parallel to AC in 6 M KOH as the electrolyte soaked in the electrospun poly(vinylidene fluoride) membrane as the separator, which exhibited an energy density of 18.8 Wh kg(-1) at a power density of 796 W kg(-1).

ISSN :2365-6549

DOI :10.1002/slct.201803151

Year:2018

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