Structure-designed synthesis of FeS2@C yolk–shell nanoboxes as a high-performance anode for sodium-ion batteries
- Authors
- Liu, Zhiming; Lu, Tianchi; Song, Taeseup; Yu, Xin-Yao; Lou, Xiong Wen (David); Paik, Ungyu
- Issue Date
- Jul-2017
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- ENERGY & ENVIRONMENTAL SCIENCE, v.10, no.7, pp.1576 - 1580
- Indexed
- SCIE
SCOPUS
- Journal Title
- ENERGY & ENVIRONMENTAL SCIENCE
- Volume
- 10
- Number
- 7
- Start Page
- 1576
- End Page
- 1580
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/4776
- DOI
- 10.1039/c7ee01100h
- ISSN
- 1754-5692
- 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.
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