02790nas a2200253   4500008004100000022001400041245013300055210006900188260000900257300001600266490000700282520188300289653002202172653002502194653001802219653002402237653002602261653001302287100002402300700002902324700002502353700003002378856012802408       2025                        eng d  a1944-824400aModulation of lithium ion transport and cycling stability using rigid and flexible urethane moieties on the backbone of polymers0 aModulation of lithium ion transport and cycling stability using   cNOV   a63784-637910 v173 a<p>
	Graphite is the anode of choice for lithium-ion batteries. Due to volume change and poor conductivity of inorganic materials, they do not show comparable performance to that of graphite. Conjugated polymers are attractive because of their modularity and ease of synthesis. Herein, we report three polymers based on diketopyrrolopyrrole (DPP) as the anode. In an energy device, stored charges are due to a diffusive and capacitive component. Increasing the capacitive component is a challenge in both organic and inorganic systems. In our polymers, we installed urethane moieties that increase the capacitive component. The excellent Li+ ion transporting urethane moiety is part of the polymer chain. The Li+ ion transport is also impacted by the packing of the polymer chain. Therefore, the DPP units and urethane moieties are connected with either an alkyl chain, phenyl or biphenyl. The polymers with either alkyl or phenyl spacers showed stable cycling stability over 4000 charge-discharge cycles. On the other hand, the specific capacity of the batteries comprising a polymer with biphenyl started decreasing after 500 charge-discharge cycles. This is due to the solubility of the polymer in the battery electrolyte. The polymer with a phenyl spacer showed a higher Li+ ion diffusion coefficient due to the space generated between the polymer chains. The X-ray photoelectron spectroscopy analysis showed that the Li+ ions are bound to carbonyls, indicating the role of urethane in the charge transport. The polymer with an alkyl spacer showed a very high specific capacity of 600 mAh/g (1500th cycle) at a current density of 0.2 A/g, which is much higher than the theoretical capacity of graphite (372 mAh/g). The charge storage in all these polymers is dominated by a capacitive component, with the highest metric of 81% shown by a polymer with an alkyl spacer.</p>
10aCycling stability10adiketopyrrolopyrrole10ahigh capacity10alithium-ion battery10anon-conjugatedpolymer10aurethane1 aKargude, Radhakisan1 aRajendran, Prakash, Babu1 aKika, Sharmin, Percy1 aKrishnamoorthy, Kothandam  uhttps://library.ncl.res.in/content/modulation-lithium-ion-transport-and-cycling-stability-using-rigid-and-flexible-urethane02600nas a2200217   4500008004100000022001400041245015500055210006900210260000800279300001600287490000700303520176900310100002802079700003102107700002502138700003002163700002102193700001902214700003002233856011902263       2026                        eng d  a2470-134300aMetal films from a single source and their application in nanoporous filtration synthesis, electromagnetic interference shielding, and electroadhesion0 aMetal films from a single source and their application in nanopo  cMAR  a14203-142110 v113 a<p>
	Electroless metal depositions are carried out by a series of reduction steps involving multiple metal ions to obtain a film on synthetic and natural substrates. Herein, we report the use of metal ions from a single element to deposit metal films on various substrates. In a typical metal deposition procedure, Pd2+ ions are anchored on a polycarbonate membrane with vertically aligned pores of 0.6 mu m, which was reduced to its nanoparticles by sodium borohydride. The Pd nanoparticle-modified membrane was then immersed in a Pd plating bath. The Pd2+ ions are reduced by the reducing agent present in the plating bath. The reaction is catalyzed by the Pd nanoparticles. The Pd-modified membrane with vertically aligned Pd tubes were used to convert p-nitrophenol to p-aminophenol, which is an important molecule in the production of acetaminophen. While filtering the reactants through the Pd tubes, due to increased collision between the reactants and the catalyst Pd tubes, 100% conversion is achieved within 5 min. On the contrary, the conversion is only 10% if the membrane is placed in a vessel comprising the reactants. Due to the versatile nature of the metal deposition procedure, nickel was deposited on cotton substrates by a similar procedure. The nickel film-coated cotton cloth showed an impressive electromagnetic shielding interference efficiency of -60 dB while the uncoated cotton cloth did not shield electromagnetic radiation. To demonstrate the versatility of the approach, Pd-coated synthetic polymeric substrates are used to electroadhere gels and gel-like substances. Nickel-coated substrates are not suitable for electroadhesion; hence, a conjugated polymer was deposited on the substrate to electroadhere gel-like substances.</p>
1 aVeerasubash, Muthupandi1 aBirajdar, Sarika, Hanamant1 aKika, Sharmin, Percy1 aSenthilkumaran, Marimuthu1 aDeshpande, Karan1 aShevate, Rahul1 aKrishnamoorthy, Kothandam  uhttps://library.ncl.res.in/content/metal-films-single-source-and-their-application-nanoporous-filtration-synthesis