Toward the design of high voltage magnesium-lithium hybrid batteries using dual-salt electrolytes

Yingwen Cheng; Daiwon Choi; Kee Sung Han; Karl T Mueller; Ji-Guang Zhang; Vincent L Sprenkle; Jun Liu; Guosheng Li

doi:10.1039/c6cc00986g

Toward the design of high voltage magnesium-lithium hybrid batteries using dual-salt electrolytes

Chem Commun (Camb). 2016 Apr 7;52(31):5379-82. doi: 10.1039/c6cc00986g.

Authors

Yingwen Cheng¹, Daiwon Choi¹, Kee Sung Han², Karl T Mueller³, Ji-Guang Zhang¹, Vincent L Sprenkle¹, Jun Liu¹, Guosheng Li¹

Affiliations

¹ Energy Processes and Materials Division, Energy and Environment Directorate Pacific Northwest National Laboratory, Richland, WA 99354, USA. [email protected] [email protected].
² Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA 99354, USA.
³ Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA 99354, USA.

PMID: 26959513
DOI: 10.1039/c6cc00986g

Abstract

We report a design of high voltage magnesium-lithium (Mg-Li) hybrid batteries through rational control of the electrolyte chemistry, electrode materials and cell architecture. Prototype devices with a structure of Mg-Li/LiFePO4 (LFP) and Mg-Li/LiMn2O4 (LMO) have been investigated. A Mg-Li/LFP cell using a dual-salt electrolyte 0.2 M [Mg2Cl2(DME)4][AlCl4]2 and 1.0 M LiTFSI exhibits voltages higher than 2.5 V (vs. Mg) and a high specific energy density of 246 W h kg(-1) under conditions that are amenable for practical applications. The successful demonstrations reported here could be a significant step forward for practical hybrid batteries.

Publication types

Research Support, U.S. Gov't, Non-P.H.S.