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Nanostructured all-solid-state supercapacitor based on Li1.4Al0.4Ti1.6(PO4)3 ceramic electrolyte

Liao, Guangyue and Zou, Qianwen and Geier, Sebastian and Wierach, Peter and Wiedemann, Martin (2016) Nanostructured all-solid-state supercapacitor based on Li1.4Al0.4Ti1.6(PO4)3 ceramic electrolyte. 67th Annual Meeting of the International Society of Electrochemistry (ISE 67), 21.-26. August, Den Haag, Niederlande.

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Abstract

Lithium aluminum titanium phosphate (LATP) is a NASION-type lithium-ion conductor, which belongs to one of the most promising solid electrolytes. High ionic conductivity at ambient temperatures and sufficiently high electrochemical stability are outstanding parameters compared to well established types of solid electrolytes [1]. These features make LATP very useful in solid state batteries and various sensors. Moreover, a novel application has been identified recently [2] employing LATP as electrolyte for manufacturing of all-solid-state supercapacitors. Advantages of solid electrolyte supercapacitors include the following: they prevent problems related to electrolyte leakage; they are non-flammable, typically enable a very long shelf life and can operate in a wide temperature range (no electrolyte freezing or boiling occur). In the present research, Li1.4Al0.4Ti1.6(PO4)3 has been synthesized by sol-gel process and used as both separator and ion conductor. Three device architectures have been examined including two with nanostructured electrodes which incorporate single-wall carbon nanotubes (SWCNTs). Herein, the SWCNTs are mixed with LATP by using ultrasonic and ball milling processes. The scanning electron microscope images reveal a more homogeneous SWCNT/LATP composite acquired by ball milling than ultrasonication, which ensures that the individual CNTs are distributed uniformly throughout the LATP and well-separated from each other [3]. Finally the solid state supercapacitors are sintered at a temperature of 750°C under N2 atmosphere. Cyclic voltammetry and electrochemical impedance spectroscopy demonstrate that these devices develop reversible double layer capacitance. The maximum capacitance of 329.5mF/g is measured by using a device of nanostructured electrodes prepared form the ball milling mixing procedure. . Explanations for the improved conductivity when using SWCNTs for the electrode layers are given from electrochemical impedance spectroscopy.

Item URL in elib:https://elib.dlr.de/107928/
Document Type:Conference or Workshop Item (Speech)
Title:Nanostructured all-solid-state supercapacitor based on Li1.4Al0.4Ti1.6(PO4)3 ceramic electrolyte
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Liao, GuangyueGuangyue.Liao (at) dlr.deUNSPECIFIED
Zou, QianwenFA-MFWUNSPECIFIED
Geier, SebastianSebastian.Geier (at) dlr.dehttps://orcid.org/0000-0001-7941-3630
Wierach, PeterPeter.Wierach (at) dlr.deUNSPECIFIED
Wiedemann, MartinMartin.Wiedemann (at) dlr.deUNSPECIFIED
Date:August 2016
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:All-solid-state supercapacitor; solid electrolyte; nanostructured electrode; cyclic voltammetry; electrochemical impedance spectroscopy
Event Title:67th Annual Meeting of the International Society of Electrochemistry (ISE 67)
Event Location:Den Haag, Niederlande
Event Type:international Conference
Event Dates:21.-26. August
Organizer:international Society of Electrochemistry
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 08:50
Last Modified:12 Dec 2016 09:02

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