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Title: Aqueous vs. nonaqueous Zn-ion batteries: consequences of the desolvation penalty at the interface

Abstract

Zinc ion batteries using metallic zinc as the negative electrode have gained considerable interest for electrochemical energy storage, whose development is crucial for the adoption of renewable energy technologies, as zinc has a very high volumetric capacity (5845 mA h cm -3), is inexpensive and compatible with aqueous electrolytes. However, the divalent charge of zinc ions, which restricts the choice of host material due to hindered solid-state diffusion, can also pose a problem for interfacial charge transfer. We report our findings on reversible intercalation of up to two Zn 2+ ions in layered V 3O 7·H 2O. This material exhibits very high capacity and power (375 mA h g -1 at a 1C rate, and 275 mA h g -1 at an 8C rate) in an aqueous electrolyte compared to a very low capacity and slow rate capabilities in a nonaqueous medium. Operando XRD studies, together with impedance analysis, reveal solid solution behavior associated with Zn 2+-ion diffusion within a water monolayer in the interlayer gap in both systems, but very sluggish interfacial charge transfer in the nonaqueous electrolyte. This points to desolvation at the interface as a major factor in dictating the kinetics. Temperature dependent impedance studies show highmore » activation energies associated with the nonaqueous charge transfer process, identifying the origin of poor electrochemical performance.« less

Authors:
 [1];  [1];  [2];  [3];  [2]; ORCiD logo [3]
  1. Univ. of Waterloo, ON (Canada). Dept. of Chemistry and Waterloo Inst. for Nanotechnology
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). The Molecular Foundry; Argonne National Lab. (ANL), Argonne, IL (United States). Joint Center for Energy Storage Research (JCESR)
  3. Univ. of Waterloo, ON (Canada). Dept. of Chemistry and Waterloo Inst. for Nanotechnology; Argonne National Lab. (ANL), Argonne, IL (United States). Joint Center for Energy Storage Research (JCESR)
Publication Date:
Research Org.:
Univ. of Waterloo, ON (Canada); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); Natural Sciences and Engineering Research Council of Canada (NSERC)
OSTI Identifier:
1469689
Grant/Contract Number:  
AC02-06CH11357; AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Energy & Environmental Science
Additional Journal Information:
Journal Volume: 11; Journal Issue: 4; Journal ID: ISSN 1754-5692
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; 36 MATERIALS SCIENCE

Citation Formats

Kundu, Dipan, Hosseini Vajargah, Shahrzad, Wan, Liwen, Adams, Brian, Prendergast, David, and Nazar, Linda F. Aqueous vs. nonaqueous Zn-ion batteries: consequences of the desolvation penalty at the interface. United States: N. p., 2018. Web. doi:10.1039/C8EE00378E.
Kundu, Dipan, Hosseini Vajargah, Shahrzad, Wan, Liwen, Adams, Brian, Prendergast, David, & Nazar, Linda F. Aqueous vs. nonaqueous Zn-ion batteries: consequences of the desolvation penalty at the interface. United States. doi:10.1039/C8EE00378E.
Kundu, Dipan, Hosseini Vajargah, Shahrzad, Wan, Liwen, Adams, Brian, Prendergast, David, and Nazar, Linda F. Mon . "Aqueous vs. nonaqueous Zn-ion batteries: consequences of the desolvation penalty at the interface". United States. doi:10.1039/C8EE00378E. https://www.osti.gov/servlets/purl/1469689.
@article{osti_1469689,
title = {Aqueous vs. nonaqueous Zn-ion batteries: consequences of the desolvation penalty at the interface},
author = {Kundu, Dipan and Hosseini Vajargah, Shahrzad and Wan, Liwen and Adams, Brian and Prendergast, David and Nazar, Linda F.},
abstractNote = {Zinc ion batteries using metallic zinc as the negative electrode have gained considerable interest for electrochemical energy storage, whose development is crucial for the adoption of renewable energy technologies, as zinc has a very high volumetric capacity (5845 mA h cm-3), is inexpensive and compatible with aqueous electrolytes. However, the divalent charge of zinc ions, which restricts the choice of host material due to hindered solid-state diffusion, can also pose a problem for interfacial charge transfer. We report our findings on reversible intercalation of up to two Zn2+ ions in layered V3O7·H2O. This material exhibits very high capacity and power (375 mA h g-1 at a 1C rate, and 275 mA h g-1 at an 8C rate) in an aqueous electrolyte compared to a very low capacity and slow rate capabilities in a nonaqueous medium. Operando XRD studies, together with impedance analysis, reveal solid solution behavior associated with Zn2+-ion diffusion within a water monolayer in the interlayer gap in both systems, but very sluggish interfacial charge transfer in the nonaqueous electrolyte. This points to desolvation at the interface as a major factor in dictating the kinetics. Temperature dependent impedance studies show high activation energies associated with the nonaqueous charge transfer process, identifying the origin of poor electrochemical performance.},
doi = {10.1039/C8EE00378E},
journal = {Energy & Environmental Science},
number = 4,
volume = 11,
place = {United States},
year = {2018},
month = {2}
}

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