TY - JOUR

T1 - Resistivity-Temperature Behavior of Intrinsically Conducting Bis(3-ethoxysalicylideniminato) nickel Polymer

AU - Beletskii, Evgenii

AU - Ershov, Valentin

AU - Danilov, Stepan

AU - Lukyanov, Daniil

AU - Alekseeva, Elena

AU - Levin, Oleg

PY - 2020/12/6

Y1 - 2020/12/6

N2 - Materials with a positive temperature coefficient have many applications, includingovercharge and over-temperature protection in lithium-ion (Li-ion) batteries. The thermoresistiveproperties of an electrically conductive polymer, based on a Ni(salen)-type backbone, known aspolyNiMeOSalen, were evaluated by means of in situ resistivity measurements. It was found that thepolymer was conductive at temperatures below 220 ◦C; however, the polymer increased in resistivityby three orders of magnitude upon reaching 250 ◦C. Thermogravimetric results combined withelemental analyses revealed that the switch from the insulation stage to the conductive stage resultedfrom thermally dedoping the polymer. Electrochemical studies demonstrated that a polymer retainsits electroactivity when it is heated and can be recovered to a conductive state through oxidation viaelectrochemical doping in an electrolyte solution.

AB - Materials with a positive temperature coefficient have many applications, includingovercharge and over-temperature protection in lithium-ion (Li-ion) batteries. The thermoresistiveproperties of an electrically conductive polymer, based on a Ni(salen)-type backbone, known aspolyNiMeOSalen, were evaluated by means of in situ resistivity measurements. It was found that thepolymer was conductive at temperatures below 220 ◦C; however, the polymer increased in resistivityby three orders of magnitude upon reaching 250 ◦C. Thermogravimetric results combined withelemental analyses revealed that the switch from the insulation stage to the conductive stage resultedfrom thermally dedoping the polymer. Electrochemical studies demonstrated that a polymer retainsits electroactivity when it is heated and can be recovered to a conductive state through oxidation viaelectrochemical doping in an electrolyte solution.

KW - Сален полимер

KW - термостабильность

KW - проводимость

KW - положительный температурный коэффициент

KW - salen polymer

KW - Thermostability

KW - conductivity

KW - positive temperature coefficient

M3 - Article

VL - 12

JO - Polymers

JF - Polymers

SN - 2073-4360

ER -