Novel poly(vinylidene fluoride-trifluoroethylene)/poly(ethylene oxide) blends for battery separators in lithium-ion applications

Abstract

Elsevier Costa, CM.; Nunes-Pereira, J.; Rodrigues, L.; Silva, M.; Gómez Ribelles, JL.; LancerosMendez, S. (2013) Corresponding author: lanceros@fisica.uminho.pt Abstract:Polymer blends based on poly(vinylidene fluoride-trifluoroethylene)/poly(ethylene oxide), P(VDF-TrFE)/PEO for Li-ion battery separators applications have been prepared through solvent casting technique. The microstructure, hidrophilicity and electrolyte uptake strongly depend on PEO content within the blend. The best value of ionic conductivity at room temperature was 0.25 mS.cm -1 for the 60/40 membrane. The membranes are electrochemically stable.

Implementation of stable electrochemical performance using a Fe0.01ZnO anodic material in alkaline Ni–Zn redox battery

“…The maximums of the binding energy for Fe 2p1/2 and Fe 2p3/2 were located at 724.5 and 711.8 eV, respectively. These values matched well with those of Fe(OH) 3 [36], suggesting that Fe mainly exists in a valence of +3. Fig.…”

“…The energy bearing materials used in redox flow batteries are not stored inside the electrode container, but are stored in a separate liquid reservoir. The liquid is pumped to the cell, in which the electrolytes are separated by an ion-conductive separator for both charging and discharging [1][2][3][4][5]. Since the redox flow cell concept was first proposed by Thaller [6] in 1974, many types of redox flow batteries have been fabricated [7].…”

Effect of the degree of porosity on the performance of poly(vinylidene fluoride-trifluoroethylene)/poly(ethylene oxide) blend membranes for lithium-ion battery separators

“…As previously reported, the conductivity of P(VDF-TrFE)/PEO based lithium salt complexes is in large extent determined by the continuity and ionic mobility in the PEO phase that depends on the electrolyte solution content in the porous membrane (uptake value) [26]. that the PEO content has large influence in both rate and ratio of liquid electrolyte uptake [38] Figure 3 shows uptake values of 123% for the polymer blend without elimination of PEO due to stronger interactions of the organic electrolyte (e.g., solvent molecules and lithium salt) with the PEO host compound associated with a plasticized structure [39].…”

“…PEO polymer is most used as polymer electrolyte and P(VDF-TrFE)/PEO blend have been produced with a room temperature ionic conductivity of 0.25 mS cm -1 for 1M LiClO 4 .3H 2 O electrolyte solution, despite the blends do not showed any porous microstructure [26].…”

Physicochemical properties of poly(vinylidene fluoride-trifluoroethylene)/poly(ethylene oxide) blend membranes for lithium ion battery applications: Influence of poly(ethylene oxide) molecular weight

“…The polymer blends with M w = 100 kDa show adequate stability for lithium-ion battery applications [44]. Taking into account the state of art and applicability of this polymer blend it is necessary to evaluate their physicochemical properties as a function of PEO molecular weight and to understand their thermal degradation mechanism.…”