Uniquely structured composite microspheres of metal sulfides and carbon with cubic nanorooms for highly efficient anode materials for sodium-ion batteries
- Authors
- Kim, Jin Koo; Park, Seung-Keun; Park, Jin-Sung; Kang, Yun Chan
- Issue Date
- 14-2월-2019
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- JOURNAL OF MATERIALS CHEMISTRY A, v.7, no.6, pp.2636 - 2645
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF MATERIALS CHEMISTRY A
- Volume
- 7
- Number
- 6
- Start Page
- 2636
- End Page
- 2645
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/67637
- DOI
- 10.1039/c8ta11481a
- ISSN
- 2050-7488
- Abstract
- Metal sulfides are promising anode materials for high-performance sodium-ion batteries. However, their drastic volume variation and poor electrical conductivity during cycling result in poor performance, which is a major challenge. In this study, we report the facile and generalized aerosol-assisted synthesis of metal sulfide/C composite microspheres with cubic nanorooms (MeSx/C-NR) by employing NaCl as a washable template. We investigated the optimization method for synthesizing this novel nanostructure by controlling the synthesis conditions. In the case of MoS2/C-NR, which was selected as the main target material, few-layered MoS2 nanosheets were successfully formed, and their restacking during cycling was prevented via incorporation with a dextrin-derived carbon matrix. Meso-/macropores generated by NaCl increased the affinity of MoS2/C-NR to the electrolyte, increasing the active surface area for electrochemical reaction and reducing the diffusion length of Na+ without compromising the structural robustness. As a result, the MoS2/C-NR delivered a stable reversible capacity of 385 mA h g(-1) for 350 cycles at a current density of 0.5 A g(-1) and a high rate performance of 287 mA h g(-1) at a current density of 7 A g(-1). This synthesis strategy can be utilized to prepare other porous metal sulfide/carbon composites, including FeS2/C-NR and SnS/C-NR, without much difficulty, which may be valuable for many other applications, including energy storage.
- 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
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholar.korea.ac.kr/handle/2021.sw.korea/67637)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.