Design of 3D-Printable Conductive Composites for 3D-Printed Battery

Author: 
Date created: 
2016-08-09
Identifier: 
etd9697
Keywords: 
Silver nanowire
CMC
Nano-composite
Percolation threshold
Paste 3D printing
Lithium battery
Abstract: 

In this research, a biocompatible nano-composite is designed for the application of 3D printed battery. The nano-composite paste is composed of an electrically conductive silver nanowire (AgNW) filler within a thixotropic carboxymethyl cellulose (CMC) matrix. Experimental demonstration and computational simulations on nano-composites with various filler fractions are performed to find the electrical percolation threshold of the nano-composite. The percolation threshold as 0.7 vol. % of AgNWs is predicted by computer simulations as well as by experiments. Also, maximum electronic conductivity is obtained as 1.19×102 S/cm from a nano-composite with 1.9 vol. % of AgNWs. Also, newly designed paste 3D printing apparatus is built by integrating a commercially available delta 3D printer with a paste extruder.Finally, the 3D printable battery facilitated by the conductive composite is demonstrated. Cathode and anode materials are formulated by addition of cathode and anode active materials to the nano-composite of AgNW and CMC. Rheology study of the cathode and anode paste is carried out and thixotropic (shear-thinning) behavior is observed which is an essential characteristic of the 3D printable paste [1], [2]. Lastly, the performance demonstration on the fabricated 3D printed battery is carried out. The 3D printable conductive paste is expected to contribute in additive manufacturing process for printable electronics.

Document type: 
Thesis
Rights: 
This thesis may be printed or downloaded for non-commercial research and scholarly purposes. Copyright remains with the author.
File(s): 
Senior supervisor: 
Woo Soo Kim
Department: 
Applied Sciences: School of Mechatronic Systems Engineering
Thesis type: 
(Thesis) M.A.Sc.
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