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Monodispersed SnS nanoparticles anchored on carbon nanotubes for high-retention sodium-ion batteries

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Title
Monodispersed SnS nanoparticles anchored on carbon nanotubes for high-retention sodium-ion batteries
Author(s)
Thi Hoai Thuong Luu; Dinh Loc Duong; Tae Hoon Lee; Duy Tho Pham; Ramkrishna Sahoo; Gyeongtak Han; Young-Min Kim; Young Hee Lee
Subject
REDUCED GRAPHENE OXIDE, ; ANODE MATERIALS, ; ENERGY-STORAGE, ; DOPED GRAPHENE, ; SUPERIOR RATE, ; HIGH-CAPACITY, ; LI-ION, ; LITHIUM, ; PERFORMANCE, ; PHASE
Publication Date
2020-04
Journal
JOURNAL OF MATERIALS CHEMISTRY A, v.8, no.16, pp.7861 - 7869
Publisher
ROYAL SOC CHEMISTRY
Abstract
Driven by the desire to find efficient alternatives to lithium-ion batteries for large-scale energy storage systems, sodium-ion batteries (SIBs) have been extensively researched with the aim of realizing similar electrochemical properties to those of lithium. While Sn-based anodes for SIBs offer reasonable theoretical capacity (847 mA h g(-1) for Na15Sn4), their sluggish kinetics, low conductivity, and large volume expansion represent unresolved drawbacks. To address these issues, we propose an effective approach to alleviate the volume pulverization and enhance the capacity of SIB anodes by anchoring SnS nanoparticles densely on a porous carbon nanotube (CNT) film (SnS@CNT). As a result of the formation of inherent chemical bonds between SnS and the surface of the CNTs, the well-dispersed SnS nanoparticles anchored on the CNT network help to significantly enlarge the contact surface area between the active material and sodium ions. This free-standing film yields a high capacity of up to 762 mA h g(-1), owing to its improved conductivity and enlarged surface area, which are attributed to the increase in capacity of 146%, compared to the capacity of SnS nanoparticles in the absence of CNT (521 mA h g(-1)), at a current density of 100 mA g(-1). The SnS@CNT anode exhibits excellent cyclability at a current density of 1 A g(-1), with capacities of 666 and 615 mA h g(-1) after 100 (100% retention) and 500 cycles (92% retention), respectively, in addition to excellent kinetics. The hybrid SnS@CNT film used as the SIB anode is binder-free, allowing for a greater concentration of active materials that contribute to battery performance
URI
https://pr.ibs.re.kr/handle/8788114/8664
DOI
10.1039/c9ta13136a
ISSN
2050-7488
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > 1. Journal Papers (저널논문)
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