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Electrical and Mechanical Properties of LiAlTi(PO4)3 Solid Electrolyte Based Power Composites

Liao, Guangyue and Geier, Sebastian and Mahrholz, Thorsten and Wierach, Peter and Wiedemann, Martin (2016) Electrical and Mechanical Properties of LiAlTi(PO4)3 Solid Electrolyte Based Power Composites. In: Proceeding of the 17th European Conference on Composite Materials. 17th European Conference on Composite Materials ECCM 2016, 26.-30. Juni 2016, München, Deutschland.

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Developing high capacitance electrical energy storage devices with weight/volume-saving properties is a highly desired goal of the energy engineering community. A novel type of composites, the multifunctional power composites, promises to become such materials. These materials have advantages as storing the electrical energy and bearing mechanical loads simultaneously. In the present researches, solid electrolyte is utilized for multifunctional power composites to avoid the leakage problem aroused by liquid electrolytes. The NASION-type ceramic Li1.4Al0.4Ti1.6(PO4)3 executing as solid electrolyte is successfully synthesized by sol-gel method. The as-prepared samples are embedded into fiber composite material using the aviation approved resin RTM6 with the Differential Pressure-Resin Transfer Molding (DP-RTM) process. The electrical properties for samples before and after embedding process are characterized by electrochemical impedance spectroscopy (EIS) as well as cyclic voltammetry (CV). Results show that, Li1.4Al0.4Ti1.6(PO4)3 possesses a conductivity of ~3×10-4 S/cm and a specific capacity of ~55 µF/g at room temperature before embedding. Conductivity and specific capacitances reduce after embedding process to some content. The mechanical properties are characterized by four-point-bending tests. The same composites without Li1.4Al0.4Ti1.6(PO4)3 are used as reference samples comparing with multifunctional power composite samples. Besides, a combination of cyclic voltammetry with four-point-bending tests has been applied as a coupling method to investigate the influence of bending loads on capacitance which indicate a stability of electrical properties of multifunctional power composites under bending loads. The developed Li1.4Al0.4Ti1.6(PO4)3 solid electrolyte-based multifunctional power composites offer a remarkable potential of multifunctional materials for future energy storage devices.

Item URL in elib:https://elib.dlr.de/107907/
Document Type:Conference or Workshop Item (Speech)
Title:Electrical and Mechanical Properties of LiAlTi(PO4)3 Solid Electrolyte Based Power Composites
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Liao, Guangyueguangyue.liao (at) dlr.deUNSPECIFIED
Geier, SebastianSebastian.Geier (at) dlr.dehttps://orcid.org/0000-0001-7941-3630
Mahrholz, ThorstenThorsten.Mahrholz (at) dlr.deUNSPECIFIED
Wierach, PeterPeter.Wierach (at) dlr.deUNSPECIFIED
Wiedemann, MartinMartin.Wiedemann (at) dlr.deUNSPECIFIED
Date:June 2016
Journal or Publication Title:Proceeding of the 17th European Conference on Composite Materials
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Multifunctional composite; Structural supercapacitor; Lithium-ion solid electrolytes; electrical property; four point bending
Event Title:17th European Conference on Composite Materials ECCM 2016
Event Location:München, Deutschland
Event Type:international Conference
Event Dates:26.-30. Juni 2016
Organizer:European Society for Composite Materials
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space System Technology
DLR - Research area:Raumfahrt
DLR - Program:R SY - Space System Technology
DLR - Research theme (Project):R - Peakpower Superkondensatoren (old), L - Structures and Materials (old), E - Thermochemical Processes (Storage) (old), V - no assignment
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Multifunctional Materials
Deposited By: Geier, Sebastian
Deposited On:12 Dec 2016 07:38
Last Modified:12 Dec 2016 07:38

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