02881nas a2200241 4500008004100000022001400041245014000055210006900195260007700264300001400341490000700355520195300362653001102315653002102326653002902347653001902376653003002395100002902425700002302454700002002477700002402497856011802521 2013 eng d a0947-653900aZeolitic imidazolate framework (ZIF)-derived, hollow-core, nitrogen-doped carbon nanostructures for oxygen-reduction reactions in PEFCs0 aZeolitic imidazolate framework ZIFderived hollowcore nitrogendop aBOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANYbWILEY-V C H VERLAG GMBHcJUL a9335-93420 v193 a

The facile synthesis of a porous carbon material that is doped with iron-coordinated nitrogen active sites (FeNC-70) is demonstrated by following an inexpensive synthetic pathway with a zeolitic imidazolate framework (ZIF-70) as a template. To emphasize the possibility of tuning the porosity and surface area of the resulting carbon materials based on the structure of the parent ZIF, two other ZIFs, that is, ZIF-68 and ZIF-69, are also synthesized. The resulting active carbon material that is derived from ZIF-70, that is, FeNC-70, exhibits the highest BET surface area of 262m2g-1 compared to the active carbon materials that are derived from ZIF-68 and ZIF-69. The HR-TEM images of FeNC-70 show that the carbon particles have a bimodal structure that is composed of a spherical macroscopic pore (about 200nm) and a mesoporous shell. X-ray photoelectron spectroscopy (XPS) reveals the presence of Fe-N-C moieties, which are the primary active sites for the oxygen-reduction reaction (ORR). Quantitative estimation by using EDAX analysis reveals a nitrogen content of 14.5wt.%, along with trace amounts of iron (0.1wt.%), in the active FeNC-70 catalyst. This active porous carbon material, which is enriched with Fe-N-C moieties, reduces the oxygen molecule with an onset potential at 0.80V versus NHE through a pathway that involves 3.3-3.8e- under acidic conditions, which is much closer to the favored 4e- pathway for the ORR. The onset potential of FeNC-70 is significantly higher than those of its counterparts (FeNC-68 and FeNC-69) and of other reported systems. The FeNC-based systems also exhibit much-higher tolerance towards MeOH oxidation and electrochemical stability during an accelerated durability test (ADT). Electrochemical analysis and structural characterizations predict that the active sites for the ORR are most likely to be the insitu generated NFeN2+2/C moieties, which are distributed along the carbon framework.

10aDoping10aElectrochemistry10ametal-organic frameworks10aNanostructures10aoxygen-reduction reaction1 aPalaniselvam, Thangavelu1 aBiswal, Bishnu, P.1 aBanerjee, Rahul1 aKurungot, Sreekumar uhttps://library.ncl.res.in/content/zeolitic-imidazolate-framework-zif-derived-hollow-core-nitrogen-doped-carbon-001863nas a2200253 4500008004100000022001400041245010900055210006900164260007700233300001400310490000700324520092400331653002501255653001501280653002901295653002101324653002201345100002501367700002501392700002001417700002401437700002101461856012701482 2014 eng d a1433-785100aTwo-in-one: inherent anhydrous and water-assisted high proton conduction in a 3D metal-organic framework0 aTwoinone inherent anhydrous and waterassisted high proton conduc aBOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANYbWILEY-V C H VERLAG GMBHcMAR a2638-26420 v533 a

The development of solid-state proton-conducting materials with high conductivity that operate under both anhydrous and humidified conditions is currently of great interest in fuel-cell technology. A 3Dmetal-organic framework (MOF) with acid-base pairs in its coordination space that efficiently conducts protons under both anhydrous and humid conditions has now been developed. The anhydrous proton conductivity for this MOF is among the highest values that have been reported for MOF materials, whereas its water-assisted proton conductivity is comparable to that of the organic polymer Nafion, which is currently used for practical applications. Unlike other MOFs, which conduct protons either under anhydrous or humid conditions, this compound should represent a considerable advance in the development of efficient solid-state proton-conducting materials that work under both anhydrous and humid conditions.

10aconducting materials10afuel cells10ametal-organic frameworks10aporous materials10aproton conduction1 aNagarkar, Sanjog, S.1 aUnni, SreeKuttan, M.1 aSharma, Amitosh1 aKurungot, Sreekumar1 aGhosh, Sujit, K. uhttps://library.ncl.res.in/content/two-one-inherent-anhydrous-and-water-assisted-high-proton-conduction-3d-metal-organic-002103nas a2200241 4500008004100000022001400041245017400055210006900229260000800298300001400306490000600320520118800326653001401514653002101528653002401549653001501573653002901588100003101617700002801648700003001676700002401706856013101730 2017 eng d a2196-021600aSingle cell fabrication towards the realistic evaluation of a CNT-strung ZIF-derived electrocatalyst as a cathode material in alkaline fuel cells and metal-air batteries0 aSingle cell fabrication towards the realistic evaluation of a CN cNOV a2928-29330 v43 a

The development of an electrocatalyst possessing all the vital requisites of an ideal electrode material, such as high porosity, high conductivity, and high intrinsic electrochemical activity, holds a decisive key in determining the activity of the triplephase boundary in many energy devices like fuel cells and metal-air battery systems. In the present work, highly porous cobalt-based ZIFs are strung along the highly conducive CNT backbone by using a simple one-pot technique at room temperature, which is then utilized to derive a porous, corrosion-resistant, Co nanoparticle-embedded electrocatalyst. Herein, for the first time, the single cell performance of the Co-ZIF-67-derived electrocatalyst has been evaluated by fabricating membrane electrode assemblies of alkaline exchange membrane fuel cell (AEMFC) and zinc-air battery (ZAB) systems. A maximum power density of 296 mW/cm(2) (vs. 317 mW/cm(2) for 40 wt.% Pt/C) and 60 mW/cm(2) (vs. 64 mW/cm(2) for 40 wt.% Pt/C) in the single cells of ZAB and AEMFC systems, respectively, establishes the practical proficiency of the homemade electrocatalyst for cathode applications during realistic system-level validations.

10aBatteries10aCarbon nanotubes10aComposite materials10afuel cells10ametal-organic frameworks1 aAiyappa, Harshitha, Barike1 aBhange, Siddheshwar, N.1 aSivasankaran, Vijitha, P.1 aKurungot, Sreekumar uhttps://library.ncl.res.in/content/single-cell-fabrication-towards-realistic-evaluation-cnt-strung-zif-derived-electrocatalyst02419nas a2200313 4500008004100000022001400041245009600055210006900151260000800220490000700228520138200235653001701617653001801634653003201652653002901684653001001713653003401723653002601757100002701783700001701810700001801827700003001845700002401875700002101899700002101920700001901941700002401960856012101984 2023 eng d a1614-683200a2D layered nanomaterials as fillers in polymer composite electrolytes for lithium batteries0 a2D layered nanomaterials as fillers in polymer composite electro cAPR0 v133 a

Polymer composite electrolytes (PCEs), i.e., materials combining the disciplines of polymer chemistry, inorganic chemistry, and electrochemistry, have received tremendous attention within academia and industry for lithium-based battery applications. While PCEs often comprise 3D micro- or nanoparticles, this review thoroughly summarizes the prospects of 2D layered inorganic, organic, and hybrid nanomaterials as active (ion conductive) or passive (nonion conductive) fillers in PCEs. The synthetic inorganic nanofillers covered here include graphene oxide, boron nitride, transition metal chalcogenides, phosphorene, and MXenes. Furthermore, the use of naturally occurring 2D layered clay minerals, such as layered double hydroxides and silicates, in PCEs is also thoroughly detailed considering their impact on battery cell performance. Despite the dominance of 2D layered inorganic materials, their organic and hybrid counterparts, such as 2D covalent organic frameworks and 2D metal-organic frameworks are also identified as tuneable nanofillers for use in PCE. Hence, this review gives an overview of the plethora of options available for the selective development of both the 2D layered nanofillers and resulting PCEs, which can revolutionize the field of polymer-based solid-state electrolytes and their implementation in lithium and post-lithium batteries.

10a2D materials10aclay minerals10acovalent organic frameworks10ametal-organic frameworks10aMXene10apolymer composite electrolyte10asolid-state batteries1 aVijayakumar, Vidyanand1 aGhosh, Meena1 aAsokan, Kiran1 aSukumaran, Santhosh, Babu1 aKurungot, Sreekumar1 aMindemark, Jonas1 aBrandell, Daniel1 aWinter, Martin1 aNair, Jijeesh, Ravi uhttps://library.ncl.res.in/content/2d-layered-nanomaterials-fillers-polymer-composite-electrolytes-lithium-batteries