Enhanced electrochemical properties of LaFeO<sub>3</sub> with Ni modification for MH-Ni batteries

Zhen-tao Dong; Yuan Li; Kai-liang Ren; Shu-qin Yang; Yu-meng Zhao; Yong-jie Yuan; Lu Zhang; Shu-min Han

doi:10.1007/s12613-018-1672-x

Volume 25 Issue 10

Oct. 2018

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International Journal of Minerals, Metallurgy and Materials > 2018 > 25(10): 1201-1207. > DOI: 10.1007/s12613-018-1672-x

Zhen-tao Dong, Yuan Li, Kai-liang Ren, Shu-qin Yang, Yu-meng Zhao, Yong-jie Yuan, Lu Zhang, and Shu-min Han, Enhanced electrochemical properties of LaFeO₃ with Ni modification for MH-Ni batteries, Int. J. Miner. Metall. Mater., 25(2018), No. 10, pp.1201-1207. https://dx.doi.org/10.1007/s12613-018-1672-x

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Research Article

Enhanced electrochemical properties of LaFeO₃ with Ni modification for MH-Ni batteries

Zhen-tao Dong^1,2),
Yuan Li²⁾,
Kai-liang Ren²⁾,
Shu-qin Yang²⁾,
Yu-meng Zhao²⁾,
Yong-jie Yuan²⁾,
Lu Zhang¹⁾ and
Shu-min Han^1,2), ,

Author Affilications

State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China
College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China

Funds:

This work was financially supported by the National Natural Science Foundation of China (Nos. 51771164, 51571173, and 51701175), the National Postdoctoral Program for Innovative Talents of China (No. BX201700204), and the Innovation Fund for the Graduate Students of Hebei Province (No. CXZZBS2017057).

Received: 04 January 2018; Revised: 07 June 2018; Accepted: 10 June 2018;

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Abstract

Abstract

In this work, we synthesized LaFeO₃-xwt%Ni (x=0, 5, 10, 15) composites via a solid-state reaction method by adding Ni to the reactants, La₂O₃ and Fe₂O₃. Field-emission scanning electron microscopy (FE-SEM) and energy-dispersive X-ray spectroscopy (EDS) results revealed that Ni powders evenly dispersed among the LaFeO₃ particles and apparently reduced their aggregation, which imparted the composites with a loose structure. Moreover, the Ni formed a conductive network, thus improving the conductivity of the composites. The maximum discharge capacity of the LaFeO₃ electrodes remarkably increased from 266.8 mAh·g^-1 (x=0) to 339.7 mAh·g^-1 (x=10). In particular, the high-rate dischargeability of the LaFeO₃-10wt%Ni electrode at a discharge current density of 1500 mA·g^-1 reached 54.6%, which was approximately 1.5 times higher than that of the pure LaFeO₃. Such a Ni-modified loose structure not only increased the charge transfer rate on the surface of the LaFeO₃ particles but also enhanced the hydrogen diffusion rate in the bulk LaFeO₃.
- LaFeO₃,
- nickel modification,
- electrochemical performances,
- MH-Ni batteries

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References (21)

References

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