Polymer composite batteries
Project Description

In recent years the development of polymer electrodes has progressed following 3 stages. First, dry solid polymer electrolyte were developed [1]. After those, gel polymer electrolytes followed. Finally, composite polymer electrolytes have been reported more recently. Among the composite polymer electrode, recent studies have revealed that composite polymer electrolytes (CPEs) have many advantages over gels and dry polymers. For example, CPEs can suppress crystallization of the polymer hosts and improve mechanical properties. Moreover, studies show that CPEs have higher conductivity and transference numbers. Existing polymer electrolyte hosts include polyethylene oxide (PEO), polyacrylonitrile (PAN), polymethyl methacrylate (PMMA) and polyvinylidene fluoride (PVDF). PVDF is extremely interesting due to the ease of preparation and low costs. For this reason, will be the focus of this project. We will develop PVDF-based electrolytes by blending PVDF with functional ceramics, in particular Nasicon and garnet conductors, and suitable Li salts following the group's earlier work [2]. Additionally, the prepare these electrolytes using traditional polymer fabrication methods such as spin coating and extrusion. Finally, the electrolyte’s conductivity will be tested and corresponding batteries will be assembled.

[1] A. Manuel Stephan, K.S. Nahm, Polymer, 47, 16 (2006)
[2] J. Yu, F. Ciucci, et al. ChemElectroChem. https://doi.org/10.1002/celc.201800643
Note that chemical safety will be required

CIUCCI Francesco
Course type
Applicant's Roles

The applicant will work on the fabrication and testing electrolytes
1. fabricate electrolytes
2. test the conductivity and physical properties of the electrolytes
3. assemble batteries to test the

Applicant's Learning Objectives

1. be introduced to solid electrolyte fabrication and testing
2. evaluate battery performance
3. grasp the basic concept of electrochemistry and battery technology

Complexity of the project