Na2Fe(SO4)2: an Anhydrous 3.6 V, Low Cost and Good Safety Cathode for Rechargeable Sodium-Ion Battery

Pan, Wenli, Guan, Wenhao, Liu, Shuangyu, Xu, Bin, Chu, Liang, Pan, Hongge, Yan, Mi and Jiang, Yinzhu (2019) Na2Fe(SO4)2: an Anhydrous 3.6 V, Low Cost and Good Safety Cathode for Rechargeable Sodium-Ion Battery. Journal of Materials Chemistry A. ISSN 2050-7488

[img] Text (Full text)
Pan et al - Na2Fe(SO4)2 AAM.pdf - Accepted Version
Restricted to Repository staff only until 29 April 2020.

Download (1MB)
Official URL: http://dx.doi.org/10.1039/C9TA02188D

Abstract

Iron-based sulfate cathode materials are promising for rechargeable batteries due to their elevated operating voltages and earth-abundant elemental composition. However, the inherent unstable SO42- units in those sulfate materials result in their low-temperature decomposition (<450 °C) and lead to SO2 gas evolution, which would hinder sulfate electrodes from outputting high voltage in safety. Herein, a new alluaudite-type sulfate cathode Na2Fe(SO4)2 for sodium ion battery is reported, which displays a high operating voltage at ~3.6 V based on Fe2+/Fe3+ redox couple as well as superior thermal stability (~580 °C). In both air and inert ambient, its SO42-units demonstrates high thermal stability, assuring good safety for battery application. Furthermore, the Na2Fe(SO4)2 cathode material shows superior stability toward moisture for ease handling. The cathode exhibits a reversible capacity of 82 mAh g-1 at 0.1 C under nonoptimal carbon coating and maintains over 60% capacity retention at 2 C. The excellent sodium storage ability tested at 0 °C and 55 °C further demonstrates the advantages of Na2Fe(SO4)2 for future energy storage applications in a wide temperature range. The present exploration on Na2Fe(SO4)2 for sodium ion battery can pave the way for developing low cost sulfate cathodes combining high voltage and good safety.

Item Type: Article
Subjects: H600 Electronic and Electrical Engineering
H800 Chemical, Process and Energy Engineering
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Paul Burns
Date Deposited: 29 Apr 2019 15:26
Last Modified: 11 Oct 2019 08:36
URI: http://nrl.northumbria.ac.uk/id/eprint/39100

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year

View more statistics


Policies: NRL Policies | NRL University Deposit Policy | NRL Deposit Licence