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Structure-designed synthesis of FeS2@C yolk-shell nanoboxes as a high-performance anode for sodium-ion batteries

Title
Structure-designed synthesis of FeS2@C yolk-shell nanoboxes as a high-performance anode for sodium-ion batteries
Author
백운규
Keywords
PYRITE FES2 NANOCRYSTALS; ELECTROCHEMICAL PROPERTIES; LITHIUM STORAGE; ROOM-TEMPERATURE; MICROSPHERES; CAPABILITY; ELECTRODES; CONVERSION; COMPOSITE; MECHANISM
Issue Date
2017-05
Publisher
ROYAL SOC CHEMISTRY
Citation
ENERGY & ENVIRONMENTAL SCIENCE, v. 10, no. 7, page. 1576-1580
Abstract
Pyrite (FeS2) is an attractive anode material for sodium-ion batteries (SIBs) with a high theoretical capacity of 894 mAh g(-1). However, its practical application is greatly hindered by the rapid capacity fading caused by the large volume expansion upon sodiation. Tuning the morphology and structure at nanoscale and applying a higher cut-off voltage are essential to address this issue. Here, a facile etching method coupled with a novel sulfidation-in-nanobox strategy is developed to synthesize unique FeS2@C yolk-shell nanoboxes. The as-obtained FeS2@C nanoboxes reveal excellent sodium storage performance. The remarkable electrochemical properties are attributed to the elaborate yolk-shell nanoarchitecture. In particular, it delivers a high specific capacity of 511 mAh g(-1) at 100 mA g(-1) after 100 cycles. Furthermore, a high specific capacity of 403 mAh g(-1) even at 5 A g(-1) is delivered. Most impressively, a stable capacity of 330 mAh g(-1) can still be retained at 2 A g(-1) even after 800 cycles.
URI
http://repository.hanyang.ac.kr/handle/20.500.11754/113886https://pubs.rsc.org/en/content/articlelanding/2017/EE/C7EE01100H#!divAbstract
ISSN
1754-5692; 1754-5706
DOI
10.1039/c7ee01100h
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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