06051nas a2200193 4500008004100000245010700041210006900148260000800217300001400225490000600239520537200245100002305617700001705640700002205657700001805679700001905697700001905716856012205735 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. uhttp://library.ncl.res.in/content/synthesis-and-ionic-conductivity-calcium-doped-ceria-relevant-solid-oxide-fuel-cell01907nas a2200229 4500008004100000022001400041245010100055210006900156260000800225300001100233490000800244520113600252653002101388653002301409653001701432653002501449653001901474100001701493700001901510700002101529856012701550 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. uhttp://library.ncl.res.in/content/ultrahigh-capacitance-nico2o4ceo2-mixed-metal-oxide-material-supercapacitor-applications02624nas a2200289 4500008004100000022001400041245011700055210006900172260000900241300001100250490000800261520167800269653001901947653003701966653003302003653001702036100001702053700001702070700001902087700001502106700001902121700001502140700001902155700001302174700001902187856012802206 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 uhttp://library.ncl.res.in/content/efficient-electrochemical-synthesis-cu-3-sisi-hybrids-negative-electrode-material-lithium01106nas a2200301 4500008004100000022001400041245021200055210006900267260000900336300001600345490000700361653002600368653002300394653002200417653002100439100002300460700001700483700002200500700001800522700001900540700001800559700001900577700001500596700001900611700002800630700002300658856012300681 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. uhttp://library.ncl.res.in/content/reconstituting-microstructural-properties-and-ionic-conductivity-copper-doped-yttria