Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/98831
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Type: Journal article
Title: Electrochemical mechanism for FeS₂/C composite in lithium ion batteries with enhanced reversible capacity
Other Titles: Electrochemical mechanism for FeS(2)/C composite in lithium ion batteries with enhanced reversible capacity
Author: Wang, S.
Yu, J.
Citation: Energies, 2016; 9(4):225-1-225-9
Publisher: MDPI
Issue Date: 2016
ISSN: 1996-1073
1996-1073
Statement of
Responsibility: 
Shengping Wang and Jingxian Yu
Abstract: Nanoscale FeS2 was synthesized via a simple hydrothermal method and was decorated by hydrothermal carbonization (FeS2@C). The structural properties of the synthesized materials detected by X-ray diffraction (XRD), together with the morphologies characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) indicated that the hydrothermal carbonization only had an impact on the morphology of pyrite. Additionally, the electrochemical performance of the coated pyrite in Li/FeS2 batteries was evaluated by galvanostatic discharge-charge tests and electrochemical impedance spectroscopy (EIS). The results showed that the initial capacity of FeS2@C was 799.2 mAh·g−1 (90% of theoretical capacity of FeS2) and that of uncoated FeS2 was only 574.6 mAh·g−1. XRD and ultraviolet (UV) visible spectroscopy results at different depths of discharge-charge for FeS2 were discussed to clarify the electrochemical mechanism, which play an important part in Li/FeS2 batteries.
Keywords: composites; electrochemical measurements; electrochemical properties
Description: Published: 23 March 2016
Rights: © 2016 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons by Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/)
RMID: 0030046830
DOI: 10.3390/en9040225
Appears in Collections:Chemistry and Physics publications

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