Structural, electrical and red emission properties of Pd/n-ZnO/p-Si/Al heterostructures

Kumar, Rajender; Chand, Subhash

doi:10.1007/s13391-015-4348-y

Cited by 9 publications

(5 citation statements)

References 45 publications

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“…In the current work, we have developed ultrafine 1D LiMn 2 O 4 nanorods of about 10-50 nm diameter using α-MnO 2 nanorod as partial template. Initially, ultrafine 1D α-MnO 2 nanorods were synthesized using a hydrothermal methodology, as reported previously [53].…”

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confidence: 99%

“…Finally, ultrafine LiMn 2 O 4 nanorods were developed by giving a heat treatment to the mixture. This is one of the few reports that illustrate the hydrothermal technique [53][54][55][56] for an efficient and homogeneous mixing of precursors, which lead to develop successfully the ultrafine 1D LiMn 2 O 4 nanorods. Furthermore, we have developed a simple and unique route to wrap the ultrafine 1D LiMn 2 O 4 nanorods with graphene oxide by simply mixing under continuous stirring, followed by a heat treatment at 750°C.…”

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confidence: 99%

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Facile synthesis of 2D graphene oxide sheet enveloping ultrafine 1D LiMn2O4 as interconnected framework to enhance cathodic property for Li-ion battery

Kumar

Rodríguez

Pol

et al. 2019

Applied Surface Science

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Cubic spinel lithium manganese oxide (LiMn 2 O 4 ) has been able to attract a great deal of attention over the years as a promising cathode material for large-scale lithium-ion batteries.Here a facile hydrothermal route followed by solid state reaction is developed using as grown ultrafine α-MnO 2 nanorods to prepare 1D LiMn 2 O 4 with 10-50 nm diameters. To enhance the cathodic property of these nanorods, a unique synthesis technique of heat treatment is developed to grow 2D graphene oxide sheet enveloping 1D LiMn 2 O 4 as interconnected framework. This nanocomposite 3D porous cathode exhibits a high specific charge capacity of 130 mAh g −1 at 0.05 C rate and Coulombic efficiency of ~98% after 100 cycles in the potential window of 3.5 to 4.3 V vs Li/Li + with promising initial charge capacity retention of ~87%, and outstanding structural stability even after 100 cycles. Enhancement in the lithiation and de-lithiation processes leading to improved performance is likely to have its origin in the 2D conducting graphene oxide sheets. It allows for decreasing the Mn dissolution, improve the electron conductivity and reduce the Li-ion path diffusion inside the favourable morphology and crystallinity of the ultrafine 1D LiMn 2 O 4 nanorods, giving rise to a promising cathode nanocomposite.

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confidence: 99%

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confidence: 99%

Facile synthesis of 2D graphene oxide sheet enveloping ultrafine 1D LiMn2O4 as interconnected framework to enhance cathodic property for Li-ion battery

Kumar

Rodríguez

Pol

et al. 2019

Applied Surface Science

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“…In the current work, we followed a solid state reaction to grow LiMn 2 O 4 nanorods of 10-80 nm diameters, after a novel hydrothermal route for effectively mixing the precursors utilizing as synthesized β-MnO 2 nanorods. Hydrothermal technique was preferred for its simplicity and effectiveness [44][45][46][47]. Hypothetically, this could be a first report on utilization of two-step hydrothermal process to achieve one of the finest 1D structures of LiMn 2 O 4 .…”

Section: Introductionmentioning

confidence: 99%

Precise control of morphology of ultrafine LiMn₂O₄ nanorods as a supercapacitor electrode via a two-step hydrothermal method

et al. 2018

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We report three different synthesis routes while maintaining similar reaction conditions to choose an effective way to precisely control the growth of ultrafine one-dimensional (1D) LiMn 2 O 4 in the form of nanorods. We developed a novel method of mixing the precursors through hydrothermal, yielding low dimensional precursors for effective solid state reaction to synthesize the nanorods. However, to achieve these, highly uniform β-MnO 2 nanorods were initially grown as one of the main precursors. The uniformity observed in as grown β-MnO 2 nanorods using hydrothermal technique help to attract minute LiOH particles upon mixing over its highly confined nano-regime surface. This facilitated the solid state reaction between MnO 2 and LiOH to develop one of the finest LiMn 2 O 4 nanorods with diameters of 10-80 nm possessing high surface area of 88.294 m 2 /g. We find superior charge storage behaviour for these finely ordered 1D nanostructures as supercapacitor electrodes in KOH with K 3 Fe(CN) 6 as electrolyte in contrast to Li 2 SO 4 . A high pseudo-capacitance of 653.5 F/g at 15 A/g is observed using galvanostatic discharge time with high retention capacity of 93% after 4000 cycles. The enhanced charge storage property may arise from the redox couple [Fe(CN) 6 ] 3− /[Fe(CN) 6 ] 4− and K + ions of the electrolyte. To the best of our knowledge, we demonstrate for the first time the effectiveness of a two-step hydrothermal method in tuning the supercapacitive behaviour of 1D LiMn 2 O 4 in redox additive electrolyte.

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“…Numerous techniques have been developed for the synthesis of nanoscale manganese dioxides including sol-gel templating [18], thermal decomposition [19], refluxing [20], solvent free solid reaction [21], electrodeposition [22] and hydrothermal methods [23][24][25][26][27][28]. Recently, we have demonstrated a simpler and low-cost hydrothermal method for the synthesis of ultrafine α-MnO 2 nanowires [29]. In the present work, we adopt quite a similar approach to examine the morphological growth of single crystalline β-MnO 2 nanorods under, however, different acidic conditions.…”

Section: Introductionmentioning

confidence: 99%

Facile size-controllable synthesis of single crystalline β-MnO₂nanorods under varying acidic strengths

et al. 2016

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A simple one-pot hydrothermal synthesis of single crystalline β-MnO 2 nanorods with diameters in the range of 10-40 nm is reported. During the synthesis process, the acid molarities were varied from 1.1 M down to 0.2 M in steps of 0.3 M while keeping the other reaction parameters constant, resulting in gradual transformation of the size of β-MnO 2 from micro to the nanoscale dimension. The as synthesized nanorods exhibit soft ferromagnetic behavior and possess a high catalytic activity with an onset potential of -0.17 V in facilitating the oxygen reduction reaction (ORR).

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Structural, electrical and red emission properties of Pd/n-ZnO/p-Si/Al heterostructures

Cited by 9 publications

References 45 publications

Facile synthesis of 2D graphene oxide sheet enveloping ultrafine 1D LiMn2O4 as interconnected framework to enhance cathodic property for Li-ion battery

Facile synthesis of 2D graphene oxide sheet enveloping ultrafine 1D LiMn2O4 as interconnected framework to enhance cathodic property for Li-ion battery

Precise control of morphology of ultrafine LiMn₂O₄ nanorods as a supercapacitor electrode via a two-step hydrothermal method

Facile size-controllable synthesis of single crystalline β-MnO₂nanorods under varying acidic strengths

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Structural, electrical and red emission properties of Pd/n-ZnO/p-Si/Al heterostructures

Cited by 9 publications

References 45 publications

Facile synthesis of 2D graphene oxide sheet enveloping ultrafine 1D LiMn2O4 as interconnected framework to enhance cathodic property for Li-ion battery

Facile synthesis of 2D graphene oxide sheet enveloping ultrafine 1D LiMn2O4 as interconnected framework to enhance cathodic property for Li-ion battery

Precise control of morphology of ultrafine LiMn2O4 nanorods as a supercapacitor electrode via a two-step hydrothermal method

Facile size-controllable synthesis of single crystalline β-MnO2nanorods under varying acidic strengths

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Precise control of morphology of ultrafine LiMn₂O₄ nanorods as a supercapacitor electrode via a two-step hydrothermal method

Facile size-controllable synthesis of single crystalline β-MnO₂nanorods under varying acidic strengths