06052nas a2200193 4500008004100000245010700041210006900148260000800217300001400225490000600239520537200245100002305617700001705640700002205657700001805679700001905697700001905716856012305735 2022 eng d00aSynthesis and ionic conductivity of calcium-doped ceria relevant to solid oxide fuel cell applications0 aSynthesis and ionic conductivity of calciumdoped ceria relevant  cOCT a8780-87910 v33 a

Towards the development of green energy devices, it is necessary to focus on commercial electrolyte materials for intermediate temperature solid oxide fuel cells (IT-SOFCs). Ca-doped ceria (CDC) samples having a composition of Ce(1−x)CaxO2−δ (0.03 ≤ x ≤ 0.1) were synthesized by a facile solid-state route and sintered at a lower temperature (1473 K). X-ray diffraction, Raman, X-ray photoelectron, Fourier-transform infrared, UV–VIS diffuse reflectance, field emission scanning electron microscopy – energy dispersive X-ray with elemental mapping, and electrochemical impedance spectroscopy techniques were used for the characterization of these CDC samples. The 0.10 CDC showed high oxide ion conductivity of 8.01 × 10−3 S cm−1 at 973 K with a lower activation energy of 0.78 eV. The 0.03 CDC, 0.05 CDC, and 0.07 CDC samples exhibited ionic conductivities of 1.66 × 10−4, 4.42 × 10−3, and 5.76 × 10−3 S cm−1 at 973 K with activation energies of 1.65, 1.01, and 0.92 eV, respectively. The present work aims to develop Ca-doped ceria as economically viable electrolytes for IT-SOFCs.

1 aMomin, Naeemakhtar1 aManjanna, J.1 aKobayashi, Satoru1 aAruna, S., T.1 aKumar, Senthil1 aNayaka, G., P. uhttps://library.ncl.res.in/content/synthesis-and-ionic-conductivity-calcium-doped-ceria-relevant-solid-oxide-fuel-cell01908nas a2200229 4500008004100000022001400041245010100055210006900156260000800225300001100233490000800244520113600252653002101388653002301409653001701432653002501449653001901474100001701493700001901510700002101529856012801550 2022 eng d a0925-838800aUltrahigh capacitance of NiCo2O4/CeO2 mixed metal oxide material for supercapacitor applications0 aUltrahigh capacitance of NiCo2O4CeO2 mixed metal oxide material  cAPR a1633120 v8993 a

Pertaining to research on energy consumption and energy storage systems, new and efficient mixed metal oxides of NiCo2O4/CeO2 as pseudo-capacitor materials have been successfully prepared by sol-gel combustion method. The synthesized unique spinel nanomaterials have been analyzed for structural and morphological characterization by FT-IR, XRD, XPS and electron microscopy techniques. The mesoporous structure and large specific surface area of the synthesized nanomaterials provide an easy channel for ion mobility rendering an effortless redox process at the electrode electrolyte interface. As a consequence, it is observed that NiCo2O4 mixed with 10% of CeO2 exhibits an excellent specific capacitance of 1355 Fg(-1) at 5 Ag-1 along with a high cycling stability with only 4.7% capacity loss at the end of 6000 cycles at a charge-discharge current density of 10 Ag-1. The results obtained are in par with some of the recent electrode materials used for supercapacitors suggesting the possible employment of NiCo2O4/CeO2 mixed metal oxides in energy storage applications. (C) 2021 Elsevier B.V. All rights reserved.

10aCharge-discharge10acyclic voltammetry10aNiCo2O4/CeO210aspecific capacitance10asupercapacitor1 aSanthosh, G.1 aNayaka, G., P.1 aBhatt, Aarti, S. uhttps://library.ncl.res.in/content/ultrahigh-capacitance-nico2o4ceo2-mixed-metal-oxide-material-supercapacitor-applications02625nas a2200289 4500008004100000022001400041245011700055210006900172260000900241300001100250490000800261520167800269653001901947653003701966653003302003653001702036100001702053700001702070700001902087700001502106700001902121700001502140700001902155700001302174700001902187856012902206 2024 eng d a0925-838800aEfficient electrochemical synthesis of Cu 3 Si/Si hybrids as negative electrode material for lithium-ion battery0 aEfficient electrochemical synthesis of Cu 3 SiSi hybrids as nega cSEP  a1749960 v9983 a

Nanoscaling and alloying techniques for silicon -based materials are widely recognized as vital technological approaches to effectively address the challenges associated with volume expansion and poor conductivity in silicon anodes. Developing short process, cost-effective preparation methods and shape controllable silicon -based materials is expected to improve their cyclability. Herein, utilizing the superior electrical conductivity of copper metal and its stable alloy interaction with silicon, the present study introduced a simple synthetic process by incorporating nanoscale Cu 2 O into a SiO 2 dioxide matrix under a combination of hydrothermal reaction with Cu (NO 3 ) 2 as the copper source and further sintering treatment. Under the conditions of a Cu:Si molar ratio to 3:8 under 850 degrees C by 2.6 V of constant electrolsyis for 3 h, straight silicon nanowires with a cross-sectional distribution were obtained. The Cu 3 Si alloy particles were enriched around silicon nanowires. Experimental testing was conducted to evaluate the electrochemical storage capabilities of Cu 3 Si/Si nanowires, resulting in an initial specific capacity of 2630.7 mAh g -1 and an initial coulombic efficiency of 88.94%. After 100 charge -discharge cycles, the discharge specific capacity reached 1675.4 mAh g -1 , with a capacity retention rate of 66.20%. This work demonstrates the effectiveness of constructing a Cu 3 Si conductive network for solving the volume expansion and conductivity problems of Si and the distinctive Cu 3 Si/Si architecture offers an exemplary model for the design of silicon -based composite anodes for advanced lithium -ion batteries.

10aCu3Si/Si alloy10aElectrochemical storage capacity10aMolten salt electrochemistry10aSi nanowires1 aJiang, Siwei1 aCheng, Jiaxu1 aNayaka, G., P.1 aDong, Peng1 aZhang, Yingjie1 aXing, Yubo1 aZhang, Xiaolei1 aDu, Ning1 aZhou, Zhongren uhttps://library.ncl.res.in/content/efficient-electrochemical-synthesis-cu-3-sisi-hybrids-negative-electrode-material-lithium01107nas a2200301 4500008004100000022001400041245021200055210006900267260000900336300001600345490000700361653002600368653002300394653002200417653002100439100002300460700001700483700002200500700001800522700001900540700001800559700001900577700001500596700001900611700002800630700002300658856012400681 2024 eng d a0272-884200aReconstituting the microstructural properties and ionic conductivity of copper - doped yttria-stabilized zirconia via mechanochemical synthesis for intermediate-temperature solid oxide fuel cell applications0 aReconstituting the microstructural properties and ionic conducti cOCT  a35178-351920 v5010aELECTRICAL-PROPERTIES10aOPTICAL-PROPERTIES10aTHERMAL-STABILITY10aTRANSITION-METAL1 aMomin, Naeemakhtar1 aManjanna, J.1 aKobayashi, Satoru1 aAruna, S., T.1 aKumar, Senthil1 aAhmad, Tokeer1 aNayaka, G., P.1 aMubeen, B.1 aSabale, Sandip1 aKangralkari, Mrunal, V.1 aKeri, Rangappa, S. uhttps://library.ncl.res.in/content/reconstituting-microstructural-properties-and-ionic-conductivity-copper-doped-yttria01299nas a2200241 4500008004100000245008600041210006900127260000900196300000800205490000600213520050300219100001900722700002100741700001900762700002000781700002400801700002400825700002300849700002900872700001400901700002500915856011700940 2025 eng d00aAdvanced zinc-polymer composites for marine corrosion protection and self-healing0 aAdvanced zincpolymer composites for marine corrosion protection  cNOV  a1500 v93 a

Steel corrosion in saltwater costs over \$2.5 trillion annually. This review highlights advancements in zinc and polymer-based coatings for marine protection. It covers traditional methods and emerging technologies like nanoparticle-enhanced alloys, conducting polymers, metal organic frameworks (MOFs), and 2D materials. These offer improved resistance, self-healing, and intelligent protection with a future focus on sustainability and extended service life for marine infrastructure.

1 aSharma, Sanjay1 aGirish, Santhosh1 aNayaka, G., P.1 aSamhitha, Shiva1 aPilliadugula, Rekha1 aShivamurthy, B., P.1 aGurumurthy, S., C.1 aRuiz-Robles, Mitchel, A.1 aRojas, D.1 aSurabhi, Srivathsava uhttps://library.ncl.res.in/content/advanced-zinc-polymer-composites-marine-corrosion-protection-and-self-healing02491nas a2200253 4500008004100000245013900041210006900180260000800249300001400257490000600271520158800277653002001865653002301885653001701908653003101925653002101956653003301977100002402010700002002034700001802054700001902072700001702091856012902108 2025 eng d00aPhotocatalytic hydrogen evolution by MoO3@g-C3N4 and MoO3@f-MWCNT nanocomposites in deionized and natural seawater under visible light0 aPhotocatalytic hydrogen evolution by MoO3gC3N4 and MoO3fMWCNT na cMAR a7175-71890 v83 a

Visible-light-driven photocatalysts are predominantly useful for converting solar to hydrogen energy via photocatalytic water-splitting reactions. The heterojunction composite materials have exhibited remarkable advantages for visible-light photocatalytic H-2 evolution. We have successfully synthesized MoO3@f-MWCNT and MoO3@g-C3N4 nanocomposites and characterized them using PXRD, UV-DRS, Raman spectroscopy, XPS, PL, TRPL, FE-SEM, HR-TEM, BET, and photocurrent. The photocatalytic water-splitting efficiency of MoO3@f-MWCNT and MoO3@g-C3N4 was measured under visible light (lambda >= 420 nm) irradiation using TEOA as a sacrificial reagent in DI water and natural seawater. The H-2 evolution rate in DI water for MoO3@f-MWCNT is 2313.56 mu mol g(-)(1) h(-)(1), and for MoO3@g-C3N4 is 2530.35 mu mol g(-1) h(-1) with an apparent quantum efficiency (AQE) of 6.38 and 6.93%, respectively. In natural seawater, the H-2 evolution rate is 2632.20 and 2845.06 mu mol g(-1) h(-1), with an AQE of 7.21 and 7.77%, respectively. The rate of H-2 evolution slightly increased in natural seawater than DI water. The Tafel slope values for MoO3@g-C3N4 and MoO3@f-MWCNT are 59 and 92 mV dec(-1), respectively. The lowest Tafel value of MoO3@g-C3N4 exhibited a faster rate of reaction. Thus, the surface interaction between the MoO3 and the porous g-C3N4 materials may create synergistic effects, which facilitate electron transport at the interface and significantly boost the photocatalytic activity. Thus, MoO3@g-C3N4 is a promising photocatalyst for renewable energy production.

10adeionized water10aelectrochemicalHER10aMoO3@f-MWCNT10aMoO3@g-C3N4 nanocomposites10anatural seawater10aphotocatalytic H-2 evolution1 aKangutkar, Raju, S.1 aWalko, Priyanka1 aDhepe, P., L.1 aNayaka, G., P.1 aManjanna, J. uhttps://library.ncl.res.in/content/photocatalytic-hydrogen-evolution-moo3g-c3n4-and-moo3f-mwcnt-nanocomposites-deionized-and02604nas a2200253 4500008004100000022001400041245013800055210006900193260000800262300001100270490000800281520171600289653002102005653002602026653002702052653002202079653002002101653002702121100001902148700002402167700002302191700001902214856011702233 2026 eng d a0921-344900aWaste-to-sensor: repurposing spent Li-ion battery graphite into reduced graphene oxide for electrochemical detection of ascorbic acid0 aWastetosensor repurposing spent Liion battery graphite into redu cJAN a1086100 v2253 a

Spent lithium-ion batteries (S-LIBs) are typically discarded in landfills after their lifecycle ends, despite containing valuable materials like graphite. While much research focuses on extracting precious metals from the cathode, this study explores the recycling, recovery, and reuse of spent graphite, converting it into reduced graphene oxide (rGO) for electrochemical sensing. The rGO material demonstrated excellent sensitivity to ascorbic acid (AA) in a concentration range of 1 mM to 100 mM at pH 7.6, offering a cost-effective solution for AA detection. The recovered graphite (RG) from S-LIBs and commercial graphite (CG) was first converted into graphene oxide (R-GO, C-GO) and then reduced (R-rGO, C-rGO). This material underwent extensive structural characterization using techniques such as powder X-ray diffraction (PXRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), Brunauer-Emmett-Teller (BET) analysis, field-emission scanning electron microscopy (FE-SEM), and high-resolution transmission electron microscopy (HR-TEM). Electrochemical performance was evaluated through cyclic voltammetry (CV), differential pulse voltammetry (DPV). This study underscores the ``waste-to-wealth'' concept and supports circular economy principles by transforming electronic waste into a valuable resource. The LOD and LOQ for both the material R-rGO and C-rGO were calculated as 3.055 mM, 10.18 mM, and 3.41 mM, 11.36 mM, respectively. The rGO-based sensor not only promotes sustainable recycling but also offers a low-cost, high-performance solution for ascorbic acid detection, with potential applications in food quality monitoring, medical diagnostics, and the cosmetic industry.

10acircular economy10aClosed loop recycling10aElectrochemical sensor10aGraphite recovery10aHydrometallurgy10aSpent Li-ion batteries1 aRawat, Purnima1 aShivamurthy, B., P.1 aPatil, Vaibhav, J.1 aNayaka, G., P. uhttps://library.ncl.res.in/content/waste-sensor-repurposing-spent-li-ion-battery-graphite-reduced-graphene-oxide