Tailor-Made Electrospun Multilayer Composite Polymer Electrolytes for High-Performance Lithium Polymer Batteries
Artikel i vetenskaplig tidskrift, 2018

A novel tailor-made multilayer composite polymer electrolyte, consisting of two outer layers of electrospun polyacrylonitrile (PAN) and one inner layer of poly(vinyl acetate) (PVAc)/poly(methyl methacrylate) (PMMA)/poly(ethylene oxide) (PEO) fibrous membrane, was prepared using continuous electrospinning. These membranes, which are made up of fibers with diameters in the nanometer range, were stacked in layers to produce interconnected pores that result in a high porosity. Gel polymer electrolytes (GPEs) were prepared by entrapping a liquid electrolyte (1 M LiPF6 in ethylene carbonate/dimethyl carbonate) in the membranes. The composite membranes exhibited a high electrolyte uptake of 450-510%, coupled with an improved room temperature ionic conductivity of up to 4.72 mS cm(-1) and a high electrochemical stability of 4.6 V versus Li/Li+. Electrochemical investigations of a composite membrane of PAN-PVAc-PAN, with a LiFePO4 cathode synthesized in-house, showed a high initial discharge capacity of 145 mAh g(-1), which corresponds to 85% utilization of the active material, and displayed stable cycle performance.

Composite Polymer Electrolytes

Ionic Conductivity

3D Network

Electrochemical Stability

Continuous Electrospinning

Författare

Du Hyun Lim

Chalmers, Fysik, Kondenserade materiens fysik

Anupriya K. Haridas

Gyeongsang National University

Stelbin Peter Figerez

Cochin University Science & Technology

Prasanth Raghavan

Cochin University Science & Technology

Aleksandar Matic

Chalmers, Fysik, Kondenserade materiens fysik

Jou-Hyeon Ahn

Gyeongsang National University

Journal of Nanoscience and Nanotechnology

1533-4880 (ISSN)

Vol. 18 9 6499-6505

Ämneskategorier

Oorganisk kemi

Materialkemi

Annan kemiteknik

DOI

10.1166/jnn.2018.15689

PubMed

29677821