Enhanced ionic conductivity in halloysite nanotube-poly(vinylidene fluoride) electrolytes for solid-state lithium-ion batteries

Abstract

The special structure of HNTs and the further formation of amorphous PVDF contribute to the enhancement of the Li+ transfer.

High-Performance Room Temperature Lithium-Ion Battery Solid Polymer Electrolytes Based on Poly(vinylidene fluoride-co-hexafluoropropylene) Combining Ionic Liquid and Zeolite

“…Regarding the host polymer matrix, a great variety of different materials have been used. PEO, poly­(ethylene carbonate) (PEC), poly­(acrylonitrile) (PAN), poly­(ethylene glycol) (PEG), and poly­(vinylidene fluoride) (PVDF) have been the most extensively explored.…”

Metal–organic frameworks and zeolite materials as active fillers for lithium-ion battery solid polymer electrolytes

“…The most studied polymer for application in SPEs is PEO, because of its high lithium ion conductivity, especially at high temperatures, when lithium salts are introduced in a composite form. 74 Other polymers, such as PVDF 75 and its co-polymers, 76 (PAN), 77 poly(ethylene carbonate) (PEC) 78 and poly(ethylene glycol) (PEG), 79 have been also studied and tested. Some works have focused on blends with two or more polymers, in order to combine the best properties of the individual ones.…”

2D Silicate Materials for Composite Polymer Electrolytes

“…[11] Nevertheless, due to the crystallization of PVDF polymer, the ionic conductivity of PVDF based SPEs is still unsatisfactory. [89] In order to improve the ionic conductivity of PVDF based CPEs, some strategies have been proposed, which also include the co-polymerization, [90] addition of fillers [38,91] or plasticizers. [92] Among them, one of the most widely used methods was to add appropriate solvents or plasticizers (e. g. DMF).…”

“…These results highlighted the importance of both plasticizers and 2D silicate fillers. For the co-existence of solvents and silicate fillers, the presence of 2D silicate material into PVDF polymer matrix could not only interact with the Li + and anions, suppress the crystallization of the polymer and hence facilitate the ionic conductivity and increase the ion transference number, [38,87,91] but also could interact with the solvent and hence stabilize the solvent and broaden the electrochemical stable window (Figure 4e). [38,94] The presence of solvents or plasticizers in PVDF-based CPEs also deteriorates the mechanical strength of the CPEs, makes it susceptible to dendrite penetration, increases the flammability and brings safety hazards.…”