01035nas a2200145 4500008004100000245007700041210006900118260000800187520050100195100002400696700002500720700002500745700001700770856010200787 2014 eng d00aAll-solid-state-supercapacitor and a process for the fabrication thereof0 aAllsolidstatesupercapacitor and a process for the fabrication th cOCT3 a

The present invention discloses. all-solid-state supercapacitor (ASSP) with enhanced electrode-electrolyte interface which gives highest very high specific capacitance, areal capacitance and shows very low internal resistance (ESR). The invention particularly discloses the fabrication of all-solid-state supercapacitor by intercalation of solid state polymer electrolyte inside the conducting porous substrate coated with a charge storage electrode material to achieve the desired effect.

1 aKurungot, Sreekumar1 aBadiger, Manohar, V.1 aAnothumakkool, Bihag1 aTorris, Arun uhttps://library.ncl.res.in/content/all-solid-state-supercapacitor-and-process-fabrication-thereof01761nas a2200241 4500008004100000022001400041245010700055210006900162260000800231300001400239490000700253520094400260653002101204653001701225653001601242100002801258700002601286700001701312700001801329700002201347700001801369856013201387 2022 eng d a1546-542X00aAddressing challenges in sealing of scalable multifiber module for O-2 enrichment using LSCF membranes0 aAddressing challenges in sealing of scalable multifiber module f cMAY a1561-15710 v193 a

Scalable and multifiber modules in oxygen separation face huge challenges due to difficulty in integrating all the necessary components, especially in sealing the fibers in a gas tight module. Here, we report our findings on design and fabrication of a multifiber La0.6Sr0.4Co0.2Fe0.8O3-delta (LSCF)-based module, which can be scaled up. The focus is on sealing ceramic-metal interfaces by layering of sealants of varying thermal properties. We have also incorporated the use of dead ended fibers to minimize ceramic-metal interfaces in the hot zones and present a new method for dead ending by flame melting. Pressurizing the air inlet feed from either bore side or shell side is detrimental to the structural integrity of the fibers. A thorough characterization of the fresh and spent fibers is also carried out using X-ray tomography and electron microscopy, which indicates effect of temperature and pressure on the fibers.

10aCharacterization10apermeability10aPerovskites1 aJogdand, Shunottara, M.1 aBedadur, Prachiti, R.1 aTorris, Arun1 aAgrawal, Ravi1 aKharul, Ulhas, K.1 aDevi, Nandini uhttps://library.ncl.res.in/content/addressing-challenges-sealing-scalable-multifiber-module-o-2-enrichment-using-lscf-membranes02683nas a2200253 4500008004100000022001400041245010100055210006900156260000900225300001400234490000600248520179900254653002602053653003302079653003102112653003302143653001802176100002102194700002302215700001802238700001702256700002402273856013202297 2022 eng d a2574-096200aAir-cathode interface-engineered electrocatalyst for solid-state rechargeable zinc-air batteries0 aAircathode interfaceengineered electrocatalyst for solidstate re cJUL  a8756-87680 v53 a

Solid-state rechargeable zinc-air batteries (ZABs) are gaining interest as a class of portable clean energy technology due to their advantages such as high theoretical energy density, intrinsic safety, and low cost. It is expected that an appropriately triple-phase boundary (TPB) engineered, bifunctional oxygen reaction (OER and ORR) electrocatalyst at the air- electrode of ZABs can redefine the performance characteristics of these systems. To explore this possibility, an electrode material consisting of manganese- cobalt-based bimetallic spinel oxide (MnCo2O4)-supported nitrogen-doped entangled graphene (MnCo2O4/NEGF) with multiple active sites responsible for facilitating both OER and ORR has been prepared. The porous 3D graphitic support significantly affects the bifunctional oxygen reaction kinetics and helps the system display a remarkable catalytic performance. The air electrode consisting of the MnCo2O4/NEGF catalyst coated over the gas diffusion layer (GDL) ensures the effective TPB, and this feature works in favor of the rechargeable ZAB system under the charging and discharging modes. As an important structural and functional attribute of the electrocatalyst, the porosity and nitrogen doping in the 3D conducting support play a decisive aspect in controlling the surface wettability (hydrophilicity/hydrophobicity) of the air electrode. The fabricated solid-state rechargeable ZAB device with the developed electrode displayed a maximum peak power density of 202 mW cm(-2), which is significantly improved as compared to the one based on the Pt/C + RuO2 standard catalyst pair (124 mW cm(-2)). The solid-state device which displayed an initial charge-discharge voltage gap of only 0.7 V at 10 mA cm(-2) showed only a small increment of 86 mV after 50 h.

10aair-cathode interface10abifunctional oxygen catalyst10aN-doped entangled graphene10asolid-state zinc-air battery10aspinel oxides1 aManna, Narugopal1 aSingh, Santosh, K.1 aKurian, Maria1 aTorris, Arun1 aKurungot, Sreekumar uhttps://library.ncl.res.in/content/air-cathode-interface-engineered-electrocatalyst-solid-state-rechargeable-zinc-air-batteries02683nas a2200217 4500008004100000022001400041245012900055210006900184260000800253490000600261520186200267653003002129653003002159653004302189100002402232700001802256700002802274700001702302700002402319856012202343 2024 eng d a2366-748600aAdvanced 3D network of N-doped graphitic carbon with FeNi alloy embedding for high-performance rechargeable Zn-air batteries0 aAdvanced 3D network of Ndoped graphitic carbon with FeNi alloy e cJUL0 v83 a

Despite the significant progress in Zn-air batteries (ZABs), their widespread use in the rechargeable sector is hindered due to the scarcity of efficient bifunctional oxygen catalysts that can catalyze both the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER). To address this, an ORR/OER bifunctional electrocatalyst is designed with ultrafine alloyed FeNi nanoparticles encapsulated in a 3D interconnected N- doped carbon network structure, featuring a carbon nitride backbone enclosed in graphitic carbon. The FeNi electrocatalyst (3DFeNiPDC) showed good bifunctional activity toward both ORR and OER in the basic medium with a low overpotential value of 30 mV for ORR and 6 mV for OER compared to its state-of-the-art counterparts Pt/C, and RuO2, respectively. Utilizing 3DFeNiPDC in a rechargeable Zn-air battery (RZAB) yields an open circuit voltage (OCV) of 1.35 V, a maximum power density of 232 mW cm-2, and an energy density of 707 W h kg-1. Additionally, a flexible RZAB employing 3DFeNiPDC demonstrates an OCV of 1.4 V with various bending angles. These finding suggest 3DFeNiPDC as a viable alternative to noble metal-based RZABs, offering superior bifunctional electrocatalytic activity and stability, particularly with its enhanced air-breathing properties facilitating improved operability under practical conditions. The bifunctional electrocatalytic activity of FeNi alloy nanoparticles embedded in a 3D- interconnected N-doped graphitic carbon (3DFeNiPDC) for both oxygen reduction and oxygen evolution is studied. The 3D architecture and core-shell characteristics of FeNi alloy nanoparticles provide better activity and stability for oxygen electrocatalysis. The electrocatalytic activity of 3DFeNiPDC has been exploited for liquid-state and solid-state flexible rechargeable zinc-air batteries. image

10aOxygen Evolution Reaction10aoxygen reduction reaction10arechargeable flexible zinc-air battery1 aPandikassala, Ajmal1 aKurian, Maria1 aGangadharan, Pranav, K.1 aTorris, Arun1 aKurungot, Sreekumar uhttps://library.ncl.res.in/content/advanced-3d-network-n-doped-graphitic-carbon-feni-alloy-embedding-high-performance02278nas a2200217 4500008004100000022001400041245010000055210006900155260000900224300001600233490000700249520151500256100001901771700001701790700002701807700001701834700004001851700001701891700002401908856012801932 2025 eng d a2050-748800aAnode|electrolyte|cathode interface engineering to develop a robust zinc metal hydrogel battery0 aAnodeelectrolytecathode interface engineering to develop a robus cDEC  a41105-411210 v133 a

The poor electrode-electrolyte interfaces in quasi-solid-state zinc metal batteries often hinder Zn2+ ion transport due to the poor compatibility of the gel electrolyte with the electrodes. This report proposes a dual-interface engineering strategy across the anode, cathode, and separator using a single hydrogel polymer electrolyte (HPE). The integration of vanadyl phosphate functionalized carbon nanotubes (VP/fCNT) into a commercial glass fiber (GF) separator, followed by a thin hydrogel coating and UV-light photopolymerization, resulted in a dual-interface engineered cathode-separator-electrolyte structure (VP/IC-EGF). To mitigate the dendritic growth, an artificial solid electrolyte interface was developed on Zn foil (AEI@Zn). The engineered GF (EGF) demonstrates a room-temperature conductivity of 6.5 mS cm-1 and a high electrochemical stability window of 2.4 V vs. Zn|Zn2+. The symmetric cell with AEI@Zn|EGF|AEI@Zn exhibits exceptional plating/stripping stability over 1400 h at a current density of 0.1 mA cm-2 and a capacity of 0.1 mAh cm-2. Moreover, the low-volume cell (AEI@Zn & Vert;VP/IC-EGF), featuring the dual-interface-engineered cathode-separator-electrolyte, demonstrates outstanding cycling stability with over 3000 charge-discharge cycles at a current rate of 1.0 A g-1, retaining 98-99% of its initial capacity and showing high coulombic efficiency. These findings underscore the significant impact of interface engineering on enhancing the performance of ZMBs.

1 aDilwale, Swati1 aBabu, Athira1 aKanheerampockil, Fayis1 aTorris, Arun1 aPuthiyaveetil, Priyanka, Pandinhare1 aBhat, Suresh1 aKurungot, Sreekumar uhttps://library.ncl.res.in/content/anodeelectrolytecathode-interface-engineering-develop-robust-zinc-metal-hydrogel-battery