A Facile Molten‐Salt Route for Large‐Scale Synthesis of NiFe2O4 Nanoplates with Enhanced Lithium Storage Capability. Issue 40 (6th August 2015)

• Record Type: Journal Article
• Authors: Huang, Gang; Du, Xinchuan; Zhang, Feifei; Yin, Dongming; Wang, Limin
• Is Part Of: Chemistry. Volume 21:Issue 40(2015)
• Page Start: 14140
• Page End: 14145
• Publication Date: 2015-08-06
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201500910
• Languages: English
• ISSNs: 0947-6539

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>Binary metal oxides have been deemed as a promising class of electrode materials for high‐performance lithium ion batteries owing to their higher conductivity and electrochemical activity than corresponding monometal oxides. Here, NiFe<sub>2</sub>O<sub>4</sub> nanoplates consisting of nanosized building blocks have been successfully fabricated by a facile, large‐scale NaCl and KCl molten‐salt route, and the changes in the morphology of NiFe<sub>2</sub>O<sub>4</sub> as a function of the molten‐salt amount have been systemically investigated. The results indicate that the molten‐salt amount mainly influences the diameter and thickness of the NiFe<sub>2</sub>O<sub>4</sub> nanoplates as well as the morphology of the nanosized building blocks. Cyclic voltammetry (CV) and galvanostatic charge–discharge measurements have been conducted to evaluate the lithium storage properties of the NiFe<sub>2</sub>O<sub>4</sub> nanoplates prepared with a Ni(NO<sub>3</sub>)<sub>2</sub>/Fe(NO<sub>3</sub>)<sub>3</sub>/KCl/NaCl molar ratio of 1:2:20:60. A high reversible capacity of 888 mAh g<sup>−1</sup> is delivered over 100 cycles at a current density of 100 mA g<sup>−1</sup>. Even at a current density of 5000 mA g<sup>−1</sup>, the discharge capacity could still reach 173 mAh g<sup>−1</sup>. Such excellent electrochemical performances of the NiFe<sub>2</sub>O<sub>4</sub> nanoplates are contributed to the short Li<sup>+</sup> diffusion distance of the nanosized building blocks and the synergetic effect of the Ni<sup>2+</sup> and Fe<sup>3+</sup> ions.</p> </abstract>