Double-shell and yolk-shell structured ZnSe-carbon nanospheres as anode materials for high-performance potassium-ion batteries
- Authors
- Lee, Areum; Park, Gi Dae; Kang, Yun Chan
- Issue Date
- 3월-2022
- Publisher
- WILEY
- Keywords
- hollow carbon; potassium-ion batteries; transition-metal chalcogenide; zinc selenide
- Citation
- INTERNATIONAL JOURNAL OF ENERGY RESEARCH, v.46, no.3, pp.3539 - 3553
- Indexed
- SCIE
SCOPUS
- Journal Title
- INTERNATIONAL JOURNAL OF ENERGY RESEARCH
- Volume
- 46
- Number
- 3
- Start Page
- 3539
- End Page
- 3553
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/143244
- DOI
- 10.1002/er.7404
- ISSN
- 0363-907X
- Abstract
- Transition-metal chalcogenides are prospective anode materials for potassium-ion batteries. Herein, crystalline ZnSe nanocrystal-loaded hollow carbon nanospheres (ZnSe-HC) are synthesized by infiltration of zinc nitrate and selenium dioxide into hollow carbon nanospheres and subsequent selenization. The electrochemical reaction mechanism of ZnSe with K-ion is systematically examined by ex-situ X-ray photoelectron spectroscopy and transmission electron microscopy. Two samples with distinctive nanostructures, which are double-shelled hollow structure and yolk-shelled structure, can be fabricated by controlling the selenization temperature, and their K-ion storage performances are compared. The double-shelled ZnSe-HC, which is prepared at a lower temperature, exhibits superior cycling and rate performances to those of the yolk-shelled ZnSe-HC. For double-shelled ZnSe-HC, small ZnSe nanocrystals embedded in the carbon shell and dispersed over the inner carbon shell contribute to the structural stability and fast kinetics during repeated cycles. As a result, the double-shelled ZnSe-HC exhibits a stable cycling performance (400 mA h g(-1) at 0.1 A g(-1) after 100 cycles) and excellent rate capability (240 mA h g(-1) at 3.0 A g(-1)).
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.