02362nas a2200253   4500008004100000022001400041245011700055210006900172260000800241300001100249490000800260520147100268653002401739653002701763653002701790653001701817100003001834700002501864700002301889700001701912700002101929700002901950856012901979       2026                        eng d  a0378-775300aEffect of imidazolium-based porous polymer binder on the electrochemical performance of lithium sulfur batteries0 aEffect of imidazoliumbased porous polymer binder on the electroc  cJUN  a2399140 v6763 a<p>
	Severe polysulfide shuttle and poor conversion kinetics remain as barriers to make Li-S batteries practically viable. Polymer binders are an important component of a battery electrode although its dosage is very small. Traditionally employed PVDF binder in Li-S batteries has no significant impact in either suppressing the polysulfide shuttle or on their conversion kinetics. Ideally, the binder for a Li-S battery should suppress the polysulfide shuttle, promote the polysulfide conversion and buffer the volume expansion during charge-discharge process. Towards this direction, herein we present a new octyl imidazolium-TFSI based porous polymeric binder (PImz) in combination with CNT/S/Nickel(II) phthalocyanine tetrasulfonic acid tetrasodium salt (Na-NPT) composite. The binder offers strong polysulfide immobilizing capabilities through electrostatic interaction with the imidazolium nitrogen and pore confinement through its porous network, while a small amount of Ni-phthalocyanine could enhance the polysulfide conversion kinetics. Li-S batteries with PImz binder delivered a high specific capacity of 805 mA h/g (0.5 C) with stable performance over 300 cycles. Furthermore, the batteries with high sulfur loading similar to 3 mg/cm(2) delivered a capacity of 820 mA h/g. This newly designed porous polymeric binder is a promising and efficient alternative to the traditionally employed PVDF in terms of synthesis, cost, performance and safety.</p>
10aImidazolium polymer10alithium sulfur battery10aNa-NPT electrocatalyst10apolysulfides1 aSenthilkumaran, Marimuthu1 aBharathkumar, H., J.1 aRamesh, Sivalingam1 aBasha, Anver1 aNanaji, Katchala1 aBabu, Rajendran, Prakash  uhttps://library.ncl.res.in/content/effect-imidazolium-based-porous-polymer-binder-electrochemical-performance-lithium-sulfur