01816nas a2200241 4500008004100000022001400041245011500055210006900170260007500239300001200314490000600326520092300332653001701255653001901272653001301291653002601304653001901330100002301349700002701372700002401399700002501423856012601448 2016 eng d a2194-428800a3D interconnected porous graphene sheets loaded with cobalt oxide nanoparticles for lithium-ion battery anodes0 a3D interconnected porous graphene sheets loaded with cobalt oxid aPOSTFACH 101161, 69451 WEINHEIM, GERMANYbWILEY-V C H VERLAG GMBHcJUL a816-8220 v43 a

Nanomaterials with high surface-to-volume ratio and tunable electronic and optical properties have expanded their use in variety of applications, especially energy conversion and storage. Here we report on the synthesis of a cobalt oxide (Co3O4)/3D-interconnected porous graphene (PG) nanocomposite by using a simple solvothermal route and its application as a Li-ion battery anode. Among the different compositions investigated, the composite PG-600 (with 50% PG) showed a discharge capacity of 700mAhg(-1) at a current density of 500mAg(-1) and maintained 90% retention after 80cycles. The high surface area of the 3DPG sheets helps the Co3O4 nanoparticles to form a uniform dispersion on the surfaces. The increased surface area (accessibility) and electrical conductivity of the composite result in significant enhancement in the capacity, cycling stability, and rate capability than the native Co3O4 phase.

10aCobalt oxide10aEnergy storage10agraphene10alithium-ion batteries10aNanocomposites1 aPuthusseri, Dhanya1 aAravindan, Vanchiappan1 aMadhavi, Srinivasan1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/3d-interconnected-porous-graphene-sheets-loaded-cobalt-oxide-nanoparticles-lithium-ion02118nas a2200301 4500008004100000022001400041245011200055210006900167260000900236300001400245490000600259520110900265653002601374653002901400653001801429653001501447653001901462100001801481700002801499700002201527700002101549700002101570700002101591700002201612700003001634700002301664856012901687 2020 eng d a2196-021600aEffect of aromatic rings and substituent on the performance of lithium batteries with rylene imide cathodes0 aEffect of aromatic rings and substituent on the performance of l cMAR  a1160-11650 v73 a

Rylene imides (RIs) are attractive organic battery materials because of the inherent modularity of the molecules. While strong aggregation of RIs is disadvantageous for fast lithium-ion transport in the organic active material, decreasing the solubility of the RIs in battery electrolytes is essential to avoid performance fading. Therefore, the design and synthesis of RIs for lithium batteries is a non-trivial task that must, among other considerations, balance lithium-ion transport in the solid material vs. low solubility by controlling aggregation and packing. We have chosen triphenylamine (TPA) as a substituent which disrupts the aggregation but maintains a low solubility due to increased aromaticity of TPA. We have synthesized three RIs with one, two, and four aromatic units in the core. All of them showed stable specific capacity over 300 charge-discharge cycles. The batteries also showed specific capacities close to their theoretical capacities with 97-99 % coulombic efficiency. The maximum specific energy and specific power were 197 mWh g(-1) and 37 mW g(-1), respectively.

10alithium-ion batteries10aorganic cathode material10arylene imides10asolubility10atriphenylamine1 aAher, Jagdish1 aGraefenstein, Alexander1 aDeshmukh, Gunvant1 aSubramani, Kumar1 aKrueger, Bastian1 aHaensch, Mareike1 aSchwenzel, Julian1 aKrishnamoorthy, Kothandam1 aWittstock, Gunther uhttps://library.ncl.res.in/content/effect-aromatic-rings-and-substituent-performance-lithium-batteries-rylene-imide-cathodes03357nas a2200265 4500008004100000022001400041245011900055210006900174260000800243300001100251490000800262520246800270653001002738653001302748653002602761653002202787653002502809100002002834700002302854700002002877700002602897700002102923700001702944856013002961 2023 eng d a0167-273800aBenign strategy toward mesoporous carbon coated Sb nanoparticles: a high-performance Li-ion/Na-ion batteries anode0 aBenign strategy toward mesoporous carbon coated Sb nanoparticles cAUG a1162430 v3963 a

Antimony (Sb)-based anodes can offer excellent gravimetric capacity (-660 mAhg(1)) in lithium-ion/sodium-ion batteries (LIBs/SIBs) fabricated using carbonate-based electrolytes complexed with lithium/sodium salt. However, high first-cycle irreversible loss (35-40%) and gradual capacity fade (25-30%/cycle) originate from solid electrolyte interphase (SEI), and severe volumetric stress (-300%) associated with alloyed phase(s) impede reallife applications. Herein, we devise a benign strategy to develop mesoporous carbon coating onto antimony nanoparticles (Sb@C) based core-shell architecture for LIBs/SIBs anode. In particular, -30-50 nm thick mesoporous carbon spheres (-1 +/- 0.5 mu m) were obtained from resorcinol-formaldehyde (RF)-based polycondensation reaction by sol-gel chemistry engulfing Sb nanoparticles by suitably controlling Cetyltrimethylammonium bromide (CTAB)-induced steric stabilization and pH modulation during synthesis. The core-shell Sb@C helps faster Li+/Na+-ion migration preventing the structural collapse of Sb during electrochemical cycling and thereby improving the capacity fade. Electrochemical results demonstrate Sb@C can deliver a specific capacity of -536 mAhg(-1) and - 291 mAhg(-1) at 0.1C current rate in LIBs and SIBs, respectively, up to 200 cycles. Electrochemical impedance spectroscopy (EIS) indicates lower charge transfer (Rct) and SEI resistance (RSEI) of Sb@C cycled electrode than the bare Sb-NPs was the probable reason for improved Li/Na-ion storage in Sb@C anode. A detailed galvanostatic intermittent titration technique (GITT) and internal resistance measurements during 1st and 2nd cycles shed light on distinguishably different Li-ion/Na-ion storage behavior. The bulk Li+/Na+-ion diffusion coefficients found diminishes at reaction voltages (0.9 V/0.6 V for lithiation and 0.6 V/0.4 V for sodiation) corresponding with alloyed phase(s) concurrent with a drop in internal resistance at the quasi-opencircuit voltage (QOCV) during 1st and 2nd discharge cycle. On the contrary, de-alloying phenomena from the fully lithiated/sodiated phase(s) display an entirely opposite trend. The Li+ diffusion coefficient reaches minima at -1.1 V with a sudden jump in the internal resistance at QOCV during 1st and 2nd charge cycle. However, Na+ diffusion coefficient gradually drops along with a steep increase in the internal resistance, indicating partial Naion trapping and irreversible capacity loss.

10aanode10aAntimony10alithium-ion batteries10amesoporous carbon10aSodium-ion batteries1 aDashairya, Love1 aChaturvedi, Vikash1 aKumar, Abhishek1 aMohanta, Tandra, Rani1 aShelke, Manjusha1 aSaha, Partha uhttps://library.ncl.res.in/content/benign-strategy-toward-mesoporous-carbon-coated-sb-nanoparticles-high-performance-li-ionna