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Title: Prussian Blue MgLi Hybrid Batteries

Abstract

The major advantage of Mg batteries relies on their promise of employing an Mg metal negative electrode, which offers much higher energy density compared to graphitic carbon. However, the strong coulombic interaction of Mg 2+ ions with anions leads to their sluggish diffusion in the solid state, which along with a high desolvation energy, hinders the development of positive electrode materials. To circumvent this limitation, Mg metal negative electrodes can be used in hybrid systems by coupling an Li + insertion cathode through a dual salt electrolyte. Two “high voltage” Prussian blue analogues (average 2.3 V vs Mg/Mg 2+ ; 3.0 V vs Li/Li + ) are investigated as cathode materials and the influence of structural water is shown. Their electrochemical profiles, presenting two voltage plateaus, are explained based on the two unique Fe bonding environments. Structural water has a beneficial impact on the cell voltage. Capacities of 125 mAh g −1 are obtained at a current density of 10 mA g −1 (≈C/10), while stable performance up to 300 cycles is demonstrated at 200 mA g −1 (≈2C). The hybrid cell design is a step toward building a safe and high density energy storage system.

Authors:
 [1];  [1];  [1]
  1. Department of Chemistry University of Waterloo 200 University Ave W Waterloo Ontario N2L 3G1 Canada
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1290301
Alternate Identifier(s):
OSTI ID: 1341091
Resource Type:
Journal Article: Published Article
Journal Name:
Advanced Science
Additional Journal Information:
Journal Name: Advanced Science Journal Volume: 3 Journal Issue: 8; Journal ID: ISSN 2198-3844
Publisher:
Wiley Blackwell (John Wiley & Sons)
Country of Publication:
Germany
Language:
English

Citation Formats

Sun, Xiaoqi, Duffort, Victor, and Nazar, Linda F. Prussian Blue MgLi Hybrid Batteries. Germany: N. p., 2016. Web. doi:10.1002/advs.201600044.
Sun, Xiaoqi, Duffort, Victor, & Nazar, Linda F. Prussian Blue MgLi Hybrid Batteries. Germany. https://doi.org/10.1002/advs.201600044
Sun, Xiaoqi, Duffort, Victor, and Nazar, Linda F. 2016. "Prussian Blue MgLi Hybrid Batteries". Germany. https://doi.org/10.1002/advs.201600044.
@article{osti_1290301,
title = {Prussian Blue MgLi Hybrid Batteries},
author = {Sun, Xiaoqi and Duffort, Victor and Nazar, Linda F.},
abstractNote = {The major advantage of Mg batteries relies on their promise of employing an Mg metal negative electrode, which offers much higher energy density compared to graphitic carbon. However, the strong coulombic interaction of Mg 2+ ions with anions leads to their sluggish diffusion in the solid state, which along with a high desolvation energy, hinders the development of positive electrode materials. To circumvent this limitation, Mg metal negative electrodes can be used in hybrid systems by coupling an Li + insertion cathode through a dual salt electrolyte. Two “high voltage” Prussian blue analogues (average 2.3 V vs Mg/Mg 2+ ; 3.0 V vs Li/Li + ) are investigated as cathode materials and the influence of structural water is shown. Their electrochemical profiles, presenting two voltage plateaus, are explained based on the two unique Fe bonding environments. Structural water has a beneficial impact on the cell voltage. Capacities of 125 mAh g −1 are obtained at a current density of 10 mA g −1 (≈C/10), while stable performance up to 300 cycles is demonstrated at 200 mA g −1 (≈2C). The hybrid cell design is a step toward building a safe and high density energy storage system.},
doi = {10.1002/advs.201600044},
url = {https://www.osti.gov/biblio/1290301}, journal = {Advanced Science},
issn = {2198-3844},
number = 8,
volume = 3,
place = {Germany},
year = {Fri Apr 15 00:00:00 EDT 2016},
month = {Fri Apr 15 00:00:00 EDT 2016}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at https://doi.org/10.1002/advs.201600044

Citation Metrics:
Cited by: 77 works
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