02510nas a2200301   4500008004100000022001400041245014300055210006900198260000800267300001200275490000800287520147800295653003001773653002401803653001801827653003101845653002001876100002401896700001801920700002201938700001901960700002201979700001902001700002302020700001902043700002502062856012102087       2023                        eng d  a0008-622300aUltra-fast electro-reduction and activation of graphene for high energy density wearable supercapacitor asymmetrically designed with MXene0 aUltrafast electroreduction and activation of graphene for high e  cJAN  a191-2010 v2033 a<p>
	Controlled perforation of graphene is vital to surpass the performance of supercapacitors that rely on their pristine form. However, their practical utilization has been halted by energy-inefficient and lengthy processing. Here, we are reporting a pulse Joule heating strategy for on-site reduction and activation to realize a multimodal porous framework made of perforated graphene using millisecond current pulses. The multimodal porosity and surface functionalities of graphene were regulated at an ultrafast rate by passing a transient current. Asdeveloped ready-to-use electrode composed of nano-to-macro multimodal porosity displays high areal capacitance of 380.2 mF cm-2 in symmetric two-electrode configuration, which is nearly 1.6 times higher than the nonelectro activated counterpart. Furthermore, a high-performance wearable asymmetric supercapacitor with an areal energy density of 107.8 mu Wh cm-2 was realized using this multimodal porous graphene in combination with suitable negative electrodes made of MXene. High energy density, together with stable and repeatable performance of the wearable device for 10000 cycles of charge-discharge and 5000 cycles of bending, signifies the importance of the as-developed device for practical wearable applications. Direct, simple processing of electrodes and orders of magnitude lower cost-and-processing-time can make the process appealing for practical wearable and other energy storage applications.</p>
10aasymmetric supercapacitor10aGraphene activation10aJoule heating10aSolid-state supercapacitor10aWearable device1 aKarim, Golam, Masud1 aDutta, Pronoy1 aMajumdar, Abhisek1 aPatra, Amalika1 aDeb, Sujit, Kumar1 aDas, Snehasish1 aDambhare, Neha, V.1 aRath, Arup, K.1 aMaiti, Uday, Narayan  uhttps://library.ncl.res.in/content/ultra-fast-electro-reduction-and-activation-graphene-high-energy-density-wearable