In the present study, authors report about experimental investigations on thermal and magnesium (Mg+2) - ion conductivity properties of polyethylene oxide (PEO) and polyvinyl pyrrolidone - iodine complex (PVP-I) polymers based blended electrolyte systems doped with magnesium sulfate (MgSCU) salt. Towards the development of better rechargeable electrochemical energy storage systems complementing to the lithium - ion batteries, research on alternative active Mg+2 - ions conducting systems has gained significant interest. Magnesium is one of the lightest multivalent metals identified for battery applications and magnesium is the most abundant element in earth’s crust, sea water and geographically prevalent than lithium [1], Since the breakthrough in the discovery of the Na+ and K+ - ions conductivity through the matrix of the polymer membranes, solid polymer electrolytes (SPEs) came into the light and they have been gaining substantial interest in both scientific and industrial sectors [2], In SPEs, the polymer acts as a host for the salt ions and at above the glass transition temperature, polymer facilitates the ‘free three dimensional space in the matrix’ for the benefit of augmentation in the mobility ions. PE0/PVP-I/M gS04 based polymer blend electrolyte membranes were fabricated by solution cast technique and as prepared free-standing membranes were directionally stable provided with an average thickness of 170 micros. The miscibility of the two polymer and variation of thermal properties as a function of salt doping concentration such as melting (Tm) and glass transition (Tg) temperatures were investigated by means of differential scanning calorimetry (DSC). The shift in position of optical absorption edge towards higher wavelength as a result of increase in salt doping concentration evidenced for the enhanced interaction between salt ion and polymer chains. Electrochemical impedance spectroscopy (EIS) measurements were performed in the temperatures range 30°C - 70°C and investigated the variation in room temperature Mg - ion conductivity and dielectric properties as a function of salt doping concentration and temperature. [1] B. Park and J. L. Schaefer, J. Electrochem. Soc. 167 (2020) 070545. [2] A. Du, H. Zhang, Z. Zhang, Adv. Mater.31 (2019) 1805930. 84
Thermal and Mg - ion conductivity properties of PEO/PVP-I blended polymer electrolyte membranes
Scaramuzza N.Conceptualization
2021-01-01
Abstract
In the present study, authors report about experimental investigations on thermal and magnesium (Mg+2) - ion conductivity properties of polyethylene oxide (PEO) and polyvinyl pyrrolidone - iodine complex (PVP-I) polymers based blended electrolyte systems doped with magnesium sulfate (MgSCU) salt. Towards the development of better rechargeable electrochemical energy storage systems complementing to the lithium - ion batteries, research on alternative active Mg+2 - ions conducting systems has gained significant interest. Magnesium is one of the lightest multivalent metals identified for battery applications and magnesium is the most abundant element in earth’s crust, sea water and geographically prevalent than lithium [1], Since the breakthrough in the discovery of the Na+ and K+ - ions conductivity through the matrix of the polymer membranes, solid polymer electrolytes (SPEs) came into the light and they have been gaining substantial interest in both scientific and industrial sectors [2], In SPEs, the polymer acts as a host for the salt ions and at above the glass transition temperature, polymer facilitates the ‘free three dimensional space in the matrix’ for the benefit of augmentation in the mobility ions. PE0/PVP-I/M gS04 based polymer blend electrolyte membranes were fabricated by solution cast technique and as prepared free-standing membranes were directionally stable provided with an average thickness of 170 micros. The miscibility of the two polymer and variation of thermal properties as a function of salt doping concentration such as melting (Tm) and glass transition (Tg) temperatures were investigated by means of differential scanning calorimetry (DSC). The shift in position of optical absorption edge towards higher wavelength as a result of increase in salt doping concentration evidenced for the enhanced interaction between salt ion and polymer chains. Electrochemical impedance spectroscopy (EIS) measurements were performed in the temperatures range 30°C - 70°C and investigated the variation in room temperature Mg - ion conductivity and dielectric properties as a function of salt doping concentration and temperature. [1] B. Park and J. L. Schaefer, J. Electrochem. Soc. 167 (2020) 070545. [2] A. Du, H. Zhang, Z. Zhang, Adv. Mater.31 (2019) 1805930. 84I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
