Enhanced electrochemical performances of LiNi0.5Mn1.5O4 by surface modification with Cu nanoparticles

Zhao G.; Lin Y.; Zhu W.; Yang W.; Huang Z.

doi:10.2298/JMMB150906021Z

Journal of Mining and Metallurgy. Section B: Metallurgy (Jan 2017)

Enhanced electrochemical performances of LiNi0.5Mn1.5O4 by surface modification with Cu nanoparticles

Zhao G.,
Lin Y.,
Zhu W.,
Yang W.,
Huang Z.

Affiliations

Zhao G.: Fujian Normal University, College of Physics and Energy, Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials, Fuzhou, China + Fujian Provincial Collaborative Innovation Center for Optoelectronic
Lin Y.: Fujian Normal University, College of Physics and Energy, Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials, Fuzhou, China + Fujian Provincial Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient D
Zhu W.: Fujian Normal University, College of Physics and Energy, Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials, Fuzhou, China + Fujian Provincial Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient D
Yang W.: Fujian Normal University, College of Physics and Energy, Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials, Fuzhou, China + Fujian Provincial Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient D
Huang Z.: Fujian Normal University, College of Physics and Energy, Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials, Fuzhou, China + Fujian Provincial Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient D

DOI: https://doi.org/10.2298/JMMB150906021Z
Journal volume & issue: Vol. 53, no. 1
pp. 61 – 66

Abstract

Read online

5V spinel LiNi0.5Mn1.5O4 cathode is prepared by traditional solid-state method and nano-Cu particles were derived from a chemical reduction process. The effect of Cu-coating on the electrochemical performances of LiNi0.5Mn1.5O4 cells, in a wide operation temperature range (-10°C, 25°C, 60°C), is investigated systematically by the charge/discharge testing, cyclic voltammograms and impedance spectroscopy, respectively. The results demonstrate that the modified material exhibits remarkably enhanced electrochemical reversibility and stability. Cu-coated material has much lower surface and charge transfer resistances and shows a higher lithium diffusion rate. The Cu coating layer as a highly efficient lithium ion conductor, acted as a highly efficient protector to restrain the contact loss.

Published in Journal of Mining and Metallurgy. Section B: Metallurgy

ISSN: 1450-5339 (Print); 2217-7175 (Online)
Publisher: Technical Faculty, Bor
Country of publisher: Serbia
LCC subjects: Technology: Mining engineering. Metallurgy
Website: http://www.doiserbia.nb.rs/journal.aspx?issn=1450-5339

About the journal

Abstract

Keywords