A study of structural, electrical and electrochemical properties of PVdF-HFP gel polymer electrolyte films for magnesium ion battery applications

Elucidating Solvation Structures for Rational Design of Multivalent Electrolytes—A Review

“…Another difference to highlight between Li and less dendrite-prone multivalent metals such as Mg is that the polymer electrolytes may not need to provide the same amount of mechanical support to prevent dendritic growth. This allows for the use of plasticizers and inclusion of organic [ 135 , 136 ] or ionic liquids [ 137 , 138 ] to make polymer gel electrolytes or polyelectrolytes. An in-depth study of IP in polymer gel electrolytes or polyelectrolytes is outside the scope of this paper, however, it would be expected that this addition would increase the dielectric constant of the solvent thus reducing IP and potentially increasing the conductivity of the system.…”

Ionic Liquid-Incorporated Zn-Ion Conducting Polymer Electrolyte Membranes

“…It may be noted that, with the addition of ionic liquid, there is a suppression in the peak intensity. This indicates that the ionic coordination between ionic liquid and polymeric macromolecules with Zn(Tf) 2 may interrupt the structure of the polymer and weaken the intermolecular interaction of the polymer chains, thereby reducing the degree of crystallinity and thus enhancing the amorphous behavior [ 34 , 36 ]. However, when the addition of ionic liquid is too large, the crystallinity of the electrolyte membranes increases, rather than further decreasing.…”

“…The pores become more abundant, with fine sizes. In general, this is beneficial for ion transportation, as the small interconnected nanopores’ structure and high specific surface areas provide a continuous pathway for ion transportation [ 34 , 40 , 41 ]. As a consequence, it is speculated that the introduction of ionic liquid to the polymer electrolyte may enhance its ionic conductivity.…”

“…Kumar et al [ 33 ] reported an electrolyte membrane based on the PVdF-HFP/NaCF 3 SO 3 /EMITf system, and the electrolyte membrane offered an ionic conductivity of ~ 5.7 × 10 −3 S cm −1 at room temperature. Tang et al [ 34 ] revealed that a GPE film of PVdF-HFP:Mg(Tf) 2 (9:1) doped with 40 wt.% EMITf exhibited a high room-temperature ionic conductivity of ~4.63 × 10 −3 S cm −1 with a wide electrochemical stability window of ~4.8 V. Thus, it was inferred that the ionic liquid-doped PVdF-HFP polymer electrolyte exhibits excellent electrochemical properties.…”

Development of multifunctional flexible and structural supercapacitors based on carbon nanotube fibers

“…Introduction of salts (K3[Fe(CN)6]) [196] and plasticizers (PC) [197] enables further increasing ionic mobility. A broad range of IL cations (e.g., imidazolium, pyridinium, alkylammonium, alkylphosphonium, pyrrolidinium, guanidinium, alkylpyrrolidinium, etc) and anions (e.g., Cl -, Br -, I -, PF6 -, BF4 -, NO3 -, TFSI -, etc) offer a variety of IL-based polymer electrolytes (Figure 2 [198][199][200][201] Combination of good thermal, oxidative and mechanical stabilities and film formation abilities makes these polymers excellent candidates for IL-based PEs. ILs have a wide electrochemical window of up to 7 V that makes them particularly promising candidates to improve energy and power densities of all-solid SCs.…”