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Research Papers

Interfacial Impedance Studies of Multilayer Structured Electrolyte Fabricated With Solvent-Casted PEO10–LiN(CF3SO2)2 and Ceramic Li1.3Al0.3Ti1.7(PO4)3 and Its Application in All-Solid-State Lithium Ion Batteries

[+] Author and Article Information
Wei Liu

Department of Mechanical
and Aerospace Engineering,
Syracuse University,
Syracuse, NY 13244-1240
e-mail: wliu40@syr.edu

Ryan J. Milcarek

Department of Mechanical
and Aerospace Engineering,
Syracuse University,
Syracuse, NY 13244-1240
e-mail: rjmilcar@syr.edu

Ryan L. Falkenstein-Smith

Department of Mechanical
and Aerospace Engineering,
Syracuse University,
Syracuse, NY 13244-1240
e-mail: rlfalken@syr.edu

Jeongmin Ahn

Fellow ASME
Department of Mechanical
and Aerospace Engineering,
Syracuse University,
Syracuse, NY 13244-1240
e-mail: jeongahn@syr.edu

1Corresponding author.

Manuscript received August 18, 2016; final manuscript received November 14, 2016; published online December 7, 2016. Assoc. Editor: Peter Pintauro.

J. Electrochem. En. Conv. Stor. 13(2), 021008 (Dec 07, 2016) (6 pages) Paper No: JEECS-16-1110; doi: 10.1115/1.4035294 History: Received August 18, 2016; Revised November 14, 2016

Experimental studies and characterization of the interfacial impedance of a novel solvent-casted solid polymer electrolyte (SPE) and Li1.3Al0.3Ti1.7(PO4)3 (LATP) ceramic bilayer electrolyte are conducted. Overall, resistance of the bilayer electrolyte decreased compared to single LATP ceramic electrolyte. The mechanism of the enhanced ion transportation at the interface is analyzed and discussed. Using the as-prepared multilayer electrolyte, all-solid-state lithium ion batteries (ASSLIBs) were fabricated with lithium metal as anode and LiMn2O4 (LMO) as cathode material. The charge/discharge properties and impedance of the cell at different temperatures were investigated. This work demonstrates the feasibility and potential of using a multilayer electrolyte structure for ASSLIBs with flexible geometries and dimensions for design.

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Figures

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Fig. 1

Schematic of the multilayer solid-electrolyte configuration

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Fig. 2

XRD pattern of Li1.3Al0.3Ti1.7(PO4)3

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Fig. 3

SEM image of the multilayer composite electrolyte at different magnifications

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Fig. 4

Nyquist plot of single electrolyte of Au/LATP/Au, SS (stainless steel)/solvent-casted SPE/SS, and Au/LATP + solvent-casted SPE/SS at (a) 23 °C, (b) 50 °C, (c) 80 °C, and (d) ratio of resistance of bilayer electrolyte to total resistance of SPE + LATP

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Fig. 5

(a) Schematic structure of interface of solvent-casted SPE/LATP and (b) lithium ion transportation mechanism at the interface

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Fig. 6

Charge/discharge voltage as a function of specific capacity of Li/multilayer electrolyte/LMO coin cell at different temperatures at 1 C discharge/charge rate and different cutoff voltages

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Fig. 7

Impedance of the Li/multilayer electrolyte/LMO coin cell at 23 °C and 50 °C

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Fig. 8

Experimental and fitting impedance of the Li/multilayer electrolyte/LMO coin cell at 70 °C, and the equivalent circuit model

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Fig. 9

Charge/discharge voltage curve as a function of specific capacity of Li/multilayer electrolyte/LMO coin cell at different cycle times at 70 °C and 1 C discharge/charge rate

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Fig. 10

Charge/discharge specific capacities as a function of cycle number of Li/multilayer electrolyte/LMO coin cell at 70 °C and 1 C discharge/charge rate

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Fig. 11

Impedance development versus cycling number at 70 °C and 1 C charge/discharge rate

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