Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 7, Issue 6, Pages 5921-5930Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.8b05904
Keywords
Pyrrhotite Fe1-xS; Alabandite MnS; Composite anode; Sodium-ion battery; Energy storage
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Funding
- National Research Foundation of Korea (NRF) - Korea Government [2017R1C1B2012700]
- Basic Science Research Program of NRF - Ministry of Science, ICT, and Future Planning [2016R1A4A1012224]
- National Research Foundation of Korea [2017R1C1B2012700] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Conversion-based transition metal sulfide compounds have been considered as a promising anode material for sodium-ion batteries (SIBs). The major obstacle of these conversion-type anode materials is a large volume change in the course of sodium-ion conversion, which deteriorates their structural stability. Herein, we report a rational combination of pyrrhotite Fe1-xS with alabandite MnS as an anode material with the subsided structural degradation and improved storage ability for SIB. Impressively, the Fe1-xS/MnS composite electrode initially delivered a discharge capacity of 602 mAh g(-1) at 100 mA g(-1) with good cycling stability and excellent rate capability, which reveals its enhanced sodium-ion storage capacity as compared to its pristine electrodes (Fe1-xS, MnS). Electrochemical impedance spectroscopy and cyclic voltammetry analyses demonstrate the enhanced rate performance and improved cycling stability of the Fe1-xS/MnS composite electrode as well as better pseudocapacitive contribution. The cooperative effect of the Fe1-xS/MnS composite anode makes it as a promising anode material for SIBs.
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