Effect of calixpyrrole in PEO–LiBF4 polymer electrolytes

Influence of macromolecular additives on transport properties of lithium organic electrolytes

“…We decided to apply calix [6]pyrrole derivative (C6P), which is selective on larger anions (I − , CF 3 SO 3 − , BF 4 − ) and, due to this, can be easier applied in PEO-based electrolytes. A significant change in the lithium transference number to values close to 1 was observed, accompanied by lowering of the overall conductivity by less then one order of magnitude [19]. The results seemed promising, because conductivity loss was related to the anion immobilization, when lithium cation conductivity remained the same or even higher.…”

Transport properties of hexanoyl chitosan-based gel electrolyte

“…The cation transference numbers, t + , in the electrolytes were determined by monitoring the current as a function of time on application of a fixed dc voltage (1.5 V) across the sample sandwiched between two stainless steel electrodes. The diffusion coefficients of cations and anions in each of the samples were calculated from the measured values of conductivity and cation transference number, t + , according to the following equations [13][14][15][16]: …”

Lithium transference number measurements and complex abilities in anion trapping triphenyloborane–poly(ethylene oxide) dimethyl ether–lithium trifluoromethanesulfonate composite electrolyte

“…One of the present experimental approaches is using ion trapping additives able to coordinate different anions [2]. As examples, linear or cyclic aza-ether compounds (with electron-withdrawing groups) [3], calixarenes and calixpyrroles [4,5] have been reported with moderate success.…”