Tags

Type your tag names separated by a space and hit enter

Activation of a MnO2 cathode by water-stimulated Mg(2+) insertion for a magnesium ion battery.
Phys Chem Chem Phys. 2015 Feb 21; 17(7):5256-64.PC

Abstract

Magnesium batteries have been considered to be one of the promising beyond lithium ion technologies due to magnesium's abundance, safety, and high volumetric capacity. However, very few materials show reversible performance as a cathode in magnesium ion systems. We present herein the best reported cycling performances of MnO2 as a magnesium battery cathode material. We show that the previously reported poor Mg(2+) insertion/deinsertion capacities in MnO2 can be greatly improved by synthesizing self-standing nanowires and introducing a small amount of water molecules into the electrolyte. Electrochemical and elemental analysis results revealed that the magnitude of Mg(2+) insertion into MnO2 highly depends on the ratio between water molecules and Mg(2+) ions present in the electrolyte and the highest Mg(2+) insertion capacity was observed at a ratio of 6H2O/Mg(2+) in the electrolyte. We demonstrate for the first time, that MnO2 nanowire electrode can be "activated" for Mg(2+) insertion/deinsertion by cycling in water containing electrolyte resulting in enhanced reversible Mg(2+) insertion/deinsertion even with the absence of water molecules. The MnO2 nanowire electrode cycled in dry Mg electrolyte after activation in water-containing electrolyte showed an initial capacity of 120 mA h g(-1) at a rate of 0.4 C and maintained 72% of its initial capacity after 100 cycles.

Authors+Show Affiliations

University of Maryland, Department of Chemistry and Biochemistry, College Park, Maryland, USA. slee@umd.edu.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

25608277

Citation

Song, Jaehee, et al. "Activation of a MnO2 Cathode By Water-stimulated Mg(2+) Insertion for a Magnesium Ion Battery." Physical Chemistry Chemical Physics : PCCP, vol. 17, no. 7, 2015, pp. 5256-64.
Song J, Noked M, Gillette E, et al. Activation of a MnO2 cathode by water-stimulated Mg(2+) insertion for a magnesium ion battery. Phys Chem Chem Phys. 2015;17(7):5256-64.
Song, J., Noked, M., Gillette, E., Duay, J., Rubloff, G., & Lee, S. B. (2015). Activation of a MnO2 cathode by water-stimulated Mg(2+) insertion for a magnesium ion battery. Physical Chemistry Chemical Physics : PCCP, 17(7), 5256-64. https://doi.org/10.1039/c4cp05591h
Song J, et al. Activation of a MnO2 Cathode By Water-stimulated Mg(2+) Insertion for a Magnesium Ion Battery. Phys Chem Chem Phys. 2015 Feb 21;17(7):5256-64. PubMed PMID: 25608277.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Activation of a MnO2 cathode by water-stimulated Mg(2+) insertion for a magnesium ion battery. AU - Song,Jaehee, AU - Noked,Malakhi, AU - Gillette,Eleanor, AU - Duay,Jonathon, AU - Rubloff,Gary, AU - Lee,Sang Bok, PY - 2015/1/22/entrez PY - 2015/1/22/pubmed PY - 2015/1/22/medline SP - 5256 EP - 64 JF - Physical chemistry chemical physics : PCCP JO - Phys Chem Chem Phys VL - 17 IS - 7 N2 - Magnesium batteries have been considered to be one of the promising beyond lithium ion technologies due to magnesium's abundance, safety, and high volumetric capacity. However, very few materials show reversible performance as a cathode in magnesium ion systems. We present herein the best reported cycling performances of MnO2 as a magnesium battery cathode material. We show that the previously reported poor Mg(2+) insertion/deinsertion capacities in MnO2 can be greatly improved by synthesizing self-standing nanowires and introducing a small amount of water molecules into the electrolyte. Electrochemical and elemental analysis results revealed that the magnitude of Mg(2+) insertion into MnO2 highly depends on the ratio between water molecules and Mg(2+) ions present in the electrolyte and the highest Mg(2+) insertion capacity was observed at a ratio of 6H2O/Mg(2+) in the electrolyte. We demonstrate for the first time, that MnO2 nanowire electrode can be "activated" for Mg(2+) insertion/deinsertion by cycling in water containing electrolyte resulting in enhanced reversible Mg(2+) insertion/deinsertion even with the absence of water molecules. The MnO2 nanowire electrode cycled in dry Mg electrolyte after activation in water-containing electrolyte showed an initial capacity of 120 mA h g(-1) at a rate of 0.4 C and maintained 72% of its initial capacity after 100 cycles. SN - 1463-9084 UR - https://www.unboundmedicine.com/medline/citation/25608277/Activation_of_a_MnO2_cathode_by_water_stimulated_Mg_2+__insertion_for_a_magnesium_ion_battery_ L2 - https://doi.org/10.1039/c4cp05591h DB - PRIME DP - Unbound Medicine ER -
Try the Free App:
Prime PubMed app for iOS iPhone iPad
Prime PubMed app for Android
Prime PubMed is provided
free to individuals by:
Unbound Medicine.