01901nas a2200181 4500008004100000022001400041245012200055210006900177260007100246300001400317490000700331520116600338100001701504700002301521700002001544700002501564856013001589 2014 eng d a0887-062400aEnhanced capacitance retention in a supercapacitor made of carbon from sugarcane bagasse by hydrothermal pretreatment0 aEnhanced capacitance retention in a supercapacitor made of carbo a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcJUN a4233-42400 v283 a

A unique morphology-controlling protocol involving hydrothermal preprocessing before pyrolysis is presented to convert cellulosic waste in the form of sugarcane bagasse into three-dimensional (3D) interconnected, conducting, and high surface area carbon nanochannels. The large buffer spaces in such a porous carbon sample yield impressive electrochemical capacitance (C-sp) of 280 F/g at a current density of 1 A/g (and 275 F/g at 5 mV/s), with 72% retention even at a very high current density of 20 A/g. In contrast, the non-hydrothermally treated sample exhibits a C-sp value of 180 F/g at 1 A/g and only 52% retention at 20 A/g. The much better performance of the hydrothermally preprocessed bagasse-derived carbon (BHAC) can be ascribed to the solvent retention inside the buffer spaces created, negating the diffusional limitations of pore inaccessibility at higher scan rates. The BHAC has a high surface area of 1260 m(2)/g with a fairly good (11 wt %) concentration of oxygen functionality. The material renders a good energy density of Wh/kg at a power density of 3.5 kW/kg and shows good cyclability of 90% after 1000 charge/discharge cycles.

1 aWahid, Malik1 aPuthusseri, Dhanya1 aPhase, Deodatta1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/enhanced-capacitance-retention-supercapacitor-made-carbon-sugarcane-bagasse-hydrothermal-001793nas a2200253 4500008004100000022001400041245014200055210006900197260007300266300001000339490000800349520087900357653001301236653001801249653002301267653002201290653002101312653001801333100001801351700001601369700001701385700001701402856012001419 2015 eng d a0167-577X00aFacile biological approach for immobilization, physicochemical characterization and antibacterial activity of noble metals nanocomposites0 aFacile biological approach for immobilization physicochemical ch aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcJUN a86-900 v1483 a

The use of biopolymer as template to regulate metallic nanoparticles is promising field in green nanotechnology. We have designed a facile biological way for rapid synthesis and immobilization of gold and silver nanoparticles on alginate films using leaf extract of Cassia auriculata. The prepared gold bio-nanocomposite (Au-BNC) and silver bio-nanocomposite (Ag-BNC) were characterized by UV-vis spectroscopy, Fourier transform infrared spectroscopy, Transmission electron microscopy and Thermal analysis. The bio-nanocomposites exhibited good antibacterial activity against both gram positive (Bacillus subtilis) and gram negative (Escherichia coli) bacteria. The metal nanoparticle embedded films have number of applications in catalysis, optical biosensors, electronic, biomedical devices and environmental remediation. (C) 2015 Elsevier B.V. All rights reserved.

10aAlginate10aAntibacterial10aBio-nanocomposites10aCassia auriculata10aCharacterization10aNanoparticles1 aParveen, Asra1 aAli, Tayyab1 aWahid, Malik1 aRao, Srinath uhttps://library.ncl.res.in/content/facile-biological-approach-immobilization-physicochemical-characterization-and-001415nas a2200193 4500008004100000245008900041210006900130260000800199300001400207490000600221520074600227100001800973700001700991700002101008700002201029700002101051700002901072856012001101 2017 eng d00aHexaphosphate-derived phosphorus-functionalized carbon for lithium-ion battery anode0 aHexaphosphatederived phosphorusfunctionalized carbon for lithium cJUL a5600-56070 v23 a

We show that high-temperature annealing of a dried hexaphosphate, namely phytic acid, renders activated (micro-porous) and phosphorus-functionalized graphene like carbon in a one-step process. At high enough temperature few volatile phosphates serve as porogen-forming entities while other groups reactively functionalize the carbon surface. The optimized material has high effective surface area due to the presence of defect states. As an anode material for Li-ion battery, it exhibits a reversible capacity that is double that of the graphite and is stable for 1000 cycles even at a high current of 5 A g(-1). This result is attributed to the concurrent presence of micropores and phosphorus containing groups in the carbon matrix.

1 aGawli, Yogesh1 aWahid, Malik1 aFernandez, Rohan1 aKothari, Dushyant1 aShelke, Manjusha1 aOgale, Satishchandra, B. uhttps://library.ncl.res.in/content/hexaphosphate-derived-phosphorus-functionalized-carbon-lithium-ion-battery-anode02085nas a2200181 4500008004100000245009100041210006900132260000800201300001200209490000800221520144200229100002001671700003001691700001701721700002301738700002101761856012101782 2021 eng d00aIce-colloidal templated carbon host for highly efficient, dendrite free Li metal anode0 aIcecolloidal templated carbon host for highly efficient dendrite cJUL a256-2650 v1793 a

With its high theoretical specific capacity value, lithium metal itself would be an ideal anode material for rechargeable Li-ion batteries (LIBs). However, practical application of lithium metal is obstructed due to lithium dendrite growth during cycling leads to unstable SEI formation, volume fluctuation and safety hazard. Herein, we have developed a novel high surface area carbon network with both meso (∼20 nm) and micron (∼1–2 μm) size porosity, via ice-colloidal templating, as a scaffold for stable lithium metal anode mitigating lithium dendrite formation. The 3D porous nitrogen doped carbon (3D PNC) network is capable of lithium deposition equivalent to 10 mAhcm−2 at 2 mAcm−2 current density with 99.96% coulombic efficiency for 100 cycles. Moreover, 3D PNC when subjected to 3000 h of continuous plating-stripping measurements (∼700 cycles) depicts the coulombic efficiency of 99.84% with no observable dendrite growth at the current density of 2 mAcm−2 and lithium intake capacity of 5 mAhcm−2. A full cell of lithium plated 3D PNC anode with LiFePO4 shows an excellently stable performance up to 50 cycles at an input current density of 50 mAg−1, with a coulombic efficiency retention of 99.73%.

1 aPatrike, Apurva1 aKaniyamparambil, Karthika1 aWahid, Malik1 aChaturvedi, Vikash1 aShelke, Manjusha uhttps://library.ncl.res.in/content/ice-colloidal-templated-carbon-host-highly-efficient-dendrite-free-li-metal-anode02305nas a2200181 4500008004100000022001400041245013100055210006900186260000800255300001600263490000800279520163700287100001701924700002101941700001801962700001701980856012601997 2023 eng d a1932-744700aDual-mode porous and highly graphitized 3D nitrogen-doped carbon network as an advance anode material for sodium-ion batteries0 aDualmode porous and highly graphitized 3D nitrogendoped carbon n cJUL a14053-140640 v1273 a

The practical application of hard carbons as the mostappealinganode material for sodium-ion batteries is hampered by their poorcycling and rate performances, emanating from poor electrochemicalstability, low electroconductivity, and sluggish Na+ transport.Designing a single remedial method for these challenges often involvescomplex and energy-intensive processes, contradicting the core conceptof cost-effectiveness for practical energy storage technology. Herein,we employed trifunctional silica (SiO2): as colloidal silicato ice template micron-sized pores, as a hard template for nanopores,and as a catalyst for the graphitization of carbon for the synthesisof a highly graphitized, efficiently nitrogen-doped, high-surface-area,three-dimensional porous carbon network (3D PNC) with dual-mode porosity(nanopores and micron-sized pores). As an anode material, the obtained3D PNC exhibits a reversible capacity of 262 mAh g(-1) at a current density of 100 mA g(-1), an ultrahighrate capability of 173 mAh g(-1) at 1 A g(-1), and a stable cycling life of 1000 cycles at a high current densityof 100 mA g(-1) with almost 100% capacity retention.The galvanostatic intermittent titration technique (GITT) revealsfacile sodium diffusion kinetics with an average diffusion coefficientof an order of & SIM;10(-9) (cm(2) s(-1)), which is fairly low compared to most reported HCanodes for SIBs. This work demonstrates how a merger of two or moresynthesis methodologies can be employed for the advanced microstructureengineering of carbon materials, opening up new avenues for the rationaldesign of anode materials in SIBs.

1 aDar, Mudasir1 aSuresh, Karthika1 aMajid, Kowsar1 aWahid, Malik uhttps://library.ncl.res.in/content/dual-mode-porous-and-highly-graphitized-3d-nitrogen-doped-carbon-network-advance-anode