腐殖酸基石墨化材料的制备及其电化学性能

doi:10.11896/j.issn.1005-023X.2018.03.004

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Abstract

The lithium-ion battery anode material have been prepared from humic acid through high-temperature heat treatment. The morphology, microcrystalline structure and electrochemical properties of as-prepared activated material were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and electrochemical testing system. The results indicated that the humic acid-based graphitized materials showed a more regular graphite lamellar structure, and the degree of graphitization of the materials was also getting higher and higher with the increase of graphitization temperature. The humic acid-based graphitized mate-rials all presented good electrochemical performance. The graphitized material with the temperature of 2 800 ℃ had a first discharge specific capacity of 356.7 mAh/g and a charge capacity of 277.6 mAh/g, and the initial coulombic efficiencies was 77.81%. The capacity retention rate after 50 cycles at 1C and 2C rates was as high as 99.4% and 95.9%, respectively. The above results suggest that the humic acid-based graphitized material is an ideal lithium ion battery anode material.

Key words： humic acid graphitized material lithium-ion batteries anode material electrochemical performance

Published: 10 February 2018

CLC number:

TQ424.1

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	Articles by authors
	Dongyong SI
	Guangxu HUANG
	Chuanxiang ZHANG
	Baolin XING
	Zehua CHEN
	Liwei CHEN
	Haoran ZHANG

Cite this article:

Dongyong SI,Guangxu HUANG,Chuanxiang ZHANG, et al. Preparation and Electrochemical Performance of Humic Acid-based Graphitized Materials[J]. Materials Reports, 2018, 32(3): 368-372.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.03.004 OR http://www.mater-rep.com/EN/Y2018/V32/I3/368

SEM patterns of Shanxi humic acid graphitized materials(2 000×)

XRD patterns of Shanxi humic acid graphitized materials

The charge/discharge curves of the Shanxi humic acid graphitized electrode materials in the first cycles with the current of 0.1C rate

Discharge specific capacity and capacity retention at different current rates of Shanxi humic acid graphitizing electrode materials

The cycle performance and rate of the Shanxi humic acid graphitized electrode materials

The cyclic voltammetry curve of Shanxi humic acid graphitized electrode material

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