Self-sacrificial template-directed ZnSe@C as high performance anode for potassium-ion batteries

时间:2020-07-07作者:浏览量:81


Self-sacrificial template-directed ZnSe@C as high performance anode for potassium-ion batteries

作者:Xu, XJ (Xu, Xijun)[ 1 ] ; Mai, B (Mai, Bo)[ 1 ] ; Liu, ZB (Liu, Zhengbo)[ 1 ] ; Ji, SM (Ji, Shaomin)[ 2 ] ; Hu, RZ (Hu, Renzong)[ 1 ] ; Ouyang, LZ (Ouyang, Liuzhang)[ 1 ] ; Liu, J (Liu, Jun)[ 1,3 ] ; Zhu, M (Zhu, Min)[ 1 ]


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CHEMICAL ENGINEERING JOURNAL


卷: 387

文献号: 124061


DOI: 10.1016/j.cej.2020.124061


出版年: MAY 1 2020


文献类型:Article


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摘要

Potassium-ion batteries (KIBs) have now stimulated considerable attention due to the widely distributed potassium salt and low cost, which become the competitive candidate for Na-/Li-ion batteries and suitable application for large-scale energy systems. Here, we have reasonably designed N-doped carbon encapsulated yolk-shell ZnSe@C anode with carbon-coated Zn2GeO4@C nanorods as the self-sacrificial template. Uniform ZnSe@C nanorods were facilely prepared by the selenidation of carbon-coated Zn2GeO4@C nanorods, which were synthesized via a simple annealing of ploydopamine-coated Zn2GeO4 nanorods. Such N-doped carbon encapsulated ZnSe@C core-shell nanorods could substantially enhance the electronic conductivity, moderate the volume expansion and provide more pathways for K+ diffusion. In detail, these ZnSe@C nanorods achieve stable galvanostatic discharge/charge performance (deliver 360 mA h g(-1) at 0.2 A g(-1) after 60 cycles and 204 mA h g(-1) at 2.0 A g(-1) over 100 repeated cycles) and superior rate capability (achieve a capacities of 389.4, 379.8, 352.2, 285.6, 226.1, and 167.5 mA h g(-1) at 0.1, 0.2, 0.5, 1.0, 2.0, and 4.0 A g(-1), respectively). The charge-discharge mechanism of ZnSe@C was further investigated by in-situ, ex-situ X-ray diffraction XRD and transmission electron microscopy (TEM) measurements.


关键词

作者关键词:K-ion batteries; ZnSe; Nanorods; Anode; Carbon-encapsulation; Core-shell structure


KeyWords Plus:HIGH-CAPACITY ANODE; N-DOPED CARBON; CATHODE MATERIAL; LITHIUM; GRAPHENE; LI; ELECTRODES; NANOBELTS; FABRICATION; PARTICLES


作者信息

通讯作者地址: Ji, SM (通讯作者)


显示更多Guangdong Univ Technol, Sch Chem Engn & Light Ind, Guangzhou 510006, Peoples R China.

地址:


显示更多[ 1 ]‎ South China Univ Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510641, Guangdong, Peoples R China

显示更多[ 2 ]‎ Guangdong Univ Technol, Sch Chem Engn & Light Ind, Guangzhou 510006, Peoples R China

显示更多[ 3 ]‎ South China Univ Technol, State Key Lab Pulp & Paper Engn, Guangzhou 510640, Peoples R China

电子邮件地址:smji@gdut.edu.cn; msjliu@scut.edu.cn


基金资助致谢

基金资助机构显示详情授权号

National Natural Science Foundation of China


51771076

National Natural Science Foundation of China


NSFC51621001

Guangdong Pearl River Talents Plan

2017GC010218

Guangzhou Science and Technology Plan Projects

201804010104

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出版商

ELSEVIER SCIENCE SA, PO BOX 564, 1001 LAUSANNE, SWITZERLAND


期刊信息

Impact Factor (影响因子): Journal Citation Reports

类别 / 分类

研究方向:Engineering


Web of Science 类别:Engineering, Environmental; Engineering, Chemical