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Prussian Blue Mg-Li Hybrid Batteries.
Adv Sci (Weinh) 2016; 3(8):1600044AS

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 Mg2+ 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/Mg2+; 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+Show Affiliations

Department of Chemistry University of Waterloo 200 University Ave W Waterloo Ontario N2L 3G1 Canada.Department of Chemistry University of Waterloo 200 University Ave W Waterloo Ontario N2L 3G1 Canada.Department of Chemistry University of Waterloo 200 University Ave W Waterloo Ontario N2L 3G1 Canada.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

27818909

Citation

Sun, Xiaoqi, et al. "Prussian Blue Mg-Li Hybrid Batteries." Advanced Science (Weinheim, Baden-Wurttemberg, Germany), vol. 3, no. 8, 2016, p. 1600044.
Sun X, Duffort V, Nazar LF. Prussian Blue Mg-Li Hybrid Batteries. Adv Sci (Weinh). 2016;3(8):1600044.
Sun, X., Duffort, V., & Nazar, L. F. (2016). Prussian Blue Mg-Li Hybrid Batteries. Advanced Science (Weinheim, Baden-Wurttemberg, Germany), 3(8), p. 1600044.
Sun X, Duffort V, Nazar LF. Prussian Blue Mg-Li Hybrid Batteries. Adv Sci (Weinh). 2016;3(8):1600044. PubMed PMID: 27818909.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Prussian Blue Mg-Li Hybrid Batteries. AU - Sun,Xiaoqi, AU - Duffort,Victor, AU - Nazar,Linda F, Y1 - 2016/04/15/ PY - 2016/02/04/received PY - 2016/11/8/entrez PY - 2016/11/8/pubmed PY - 2016/11/8/medline KW - Li ion intercalation KW - Mg negative electrode KW - Mg–Li hybrid battery KW - Prussian blue SP - 1600044 EP - 1600044 JF - Advanced science (Weinheim, Baden-Wurttemberg, Germany) JO - Adv Sci (Weinh) VL - 3 IS - 8 N2 - 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 Mg2+ 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/Mg2+; 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. SN - 2198-3844 UR - https://www.unboundmedicine.com/medline/citation/27818909/Prussian_Blue_Mg_Li_Hybrid_Batteries_ L2 - https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/27818909/ DB - PRIME DP - Unbound Medicine ER -