花瓣状纳米硫和球状纳米硫的制备及性能

doi:10.11896/cldb. 21080095

材料导报

2023, Vol. 37

Issue (5): 21080095-11 https://doi.org/10.11896/cldb. 21080095

无机非金属及其复合材料

花瓣状纳米硫和球状纳米硫的制备及性能

崔春娟^1,2,*, 赵亚男¹, 刘跃¹, 武重洋¹, 张凯¹, 王妍¹, 魏剑¹

1 西安建筑科技大学冶金工程学院,西安 710055
2 陕西省冶金工程技术研究中心,西安 710055

Preparation and Properties of Petal-shaped Nano-sulfur and Spherical Nano-sulfur

CUI Chunjuan^1,2,*, ZHAO Yanan¹, LIU Yue¹, WU Chongyang¹, ZHANG Kai¹, WANG Yan¹, WEI Jian¹

1 School of Metallurgical Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
2 Shaanxi Metallurgical Engineering Technology Research Center, Xi'an 710055, China

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摘要锂硫电池因能量密度高、环境友好,被认为是最有希望的新一代能源储存装置。但是,多硫化物穿梭效应和体积膨胀等问题是锂硫电池目前所面临的巨大挑战。通过化学合成法制备了不同形貌且具有稳定规则结构的纳米硫,为电池在充放电过程中提供更多的活性位点,有效减少正极活性物质的损失,使电池的电化学性能得到提升。结果表明,花瓣状纳米硫材料在0.1C的电流密度下有740.72 mAh/g的初始容量,100次循环后容量保持在362.07 mAh/g;球状纳米硫材料在0.1C的电流密度下初始容量为825.30 mAh/g,100次循环后容量保持在418.06 mAh/g,每圈的容量衰减率仅为0.493%。

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	崔春娟
	赵亚男
	刘跃
	武重洋
	张凯
	王妍
	魏剑

关键词: 锂硫电池正极材料花瓣状纳米硫球状纳米硫放电比容量

Abstract: Lithium-sulfur batteries are considered as the most promising new generation of energy storage devices because of high energy density and environmental friendliness. However, the problems of polysulfide shuttle effect and volume expansion are the current challenges for Li-S batteries. In this work, nano-sulfur with different morphology and stable regular structure were prepared by chemical synthesis method. The aim of this work is to provide more active sites for batteries in the process of charge and discharge, to reduce the loss of active substances in the positive electrode effectively, to improve the electrochemical performance of batteries. The results showed that the flower-S exhibited an initial capacity of 740.72 mAh/g after 100 cycles at 0.1C and capacity remained at 362.07 mAh/g. The sphere-S exhibited an initial capacity of 825.30 mAh/g after 100 cycles at 0.1C and capacity remained at 418.06 mAh/g, the capacity attenuation rate was only 0.493% per cycle.

Key words: lithium-sulfur battery cathode material flower-S sphere-S discharge specific capacity

出版日期: 2023-03-10 发布日期: 2023-03-14

ZTFLH:

TM912

基金资助: 国家自然科学基金(51201121);陕西省国际科技合作与交流计划项目(2016KW-055);陕西省重点研发计划重点产业创新链(群)资助项目(2019ZDLGY04-04);山西省科技重大专项项目(20191102006)

通讯作者: ^*崔春娟,西安建筑科技大学冶金工程学院教授、博士研究生导师。2002—2008年在西北工业大学材料加工工程专业取得硕士和博士学位,2013—2014年在美国肯塔基大学的化学与材料做访问学者。发表期刊论文50余篇,其中30余篇被SCI收录。合作出版著作《金属凝固理论及应用技术》一部,研究方向为复合材料的组织与性能。cuichunjuan@xauat.edu.cn

引用本文:

崔春娟, 赵亚男, 刘跃, 武重洋, 张凯, 王妍, 魏剑. 花瓣状纳米硫和球状纳米硫的制备及性能[J]. 材料导报, 2023, 37(5): 21080095-11.
CUI Chunjuan, ZHAO Yanan, LIU Yue, WU Chongyang, ZHANG Kai, WANG Yan, WEI Jian. Preparation and Properties of Petal-shaped Nano-sulfur and Spherical Nano-sulfur. Materials Reports, 2023, 37(5): 21080095-11.

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http://www.mater-rep.com/CN/10.11896/cldb. 21080095 或 http://www.mater-rep.com/CN/Y2023/V37/I5/21080095

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