scholarly journals A Facile Synthesis of PbS-G QDs Nanocomposite as Electrode Material With Enhanced Energy Density for High Performance Supercapattery Application

2021 ◽  
Author(s):  
G. Suganya ◽  
M. Arivanandhan ◽  
Kalpana Gopalakrishnan
Keyword(s):  
Electrochemical Performance ◽  
Electrode Material ◽  
High Performance ◽  
Specific Capacity ◽  
Analytical Techniques ◽  
Active Electrode ◽  
High Specific Capacity ◽  
Power Densities ◽  
Enhanced Electrochemical Performance ◽  
Discharge Curves

Abstract Bare PbS QDs and PbS-GQDs nanocomposite were prepared by chemical methods for supercapattery application and characterized by suitable analytical techniques confirming the formation of PbS-GQDs nanocomposite. The electrochemical performance of the fabricated electrodes showed that the PbS-GQDs nanocomposite exhibited high specific capacity, energy and power densities of 577.94 C g-1 , 166.45 Wh kg-1 and 576.01 W kg-1 respectively at 2 A g-1 compared to that of bare PbS QDs. The enhanced electrochemical performance of PbS-GQDs can be associated with the conductive platform provided by synergistic effect of GQDs. The nonlinearity in charge and discharge curves confirms the supercapattery behaviour of the nanocomposite. Also, PbS-G QDs nanocomposite electrode showed highly cyclic stability compared to bare PbS QDs after 5000 cycles. The results emphasize the potential of PbS-G QDs nanocomposite as a stable active electrode material for energy storage application.

Interface-engineered hematite nanocones as binder-free electrodes for high-performance lithium-ion batteries

2018 ◽  
Vol 6 (28) ◽  
pp. 13968-13974 ◽  
Author(s):  
Lei Wang ◽  
Kun Liang ◽  
Guanzhi Wang ◽  
Yang Yang
Keyword(s):  
Electrochemical Performance ◽  
High Performance ◽  
Specific Capacity ◽  
Rate Capability ◽  
Lithium Ion ◽  
High Specific Capacity ◽  
One Dimensional ◽  
Binder Free ◽  
Enhanced Electrochemical Performance ◽  
Good Rate Capability

One-dimensional α-Fe2O3 nanocone arrays exhibited an enhanced electrochemical performance with high specific capacity, good rate capability, and excellent cyclability.

scholarly journals Ce-Doped PANI/Fe3O4 Nanocomposites: Electrode Materials for Supercapattery

2021 ◽  
Vol 3 ◽  
Author(s):  
Subash Pandey ◽  
Shova Neupane ◽  
Dipak Kumar Gupta ◽  
Anju Kumari Das ◽  
Nabin Karki ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Electrode Material ◽  
High Performance ◽  
Electrode Materials ◽  
Specific Capacity ◽  
Maximum Energy ◽  
Potential Range ◽  
X Ray Diffraction ◽  
Active Electrode ◽  
Transmission Electron

In this study, we report on a combined approach to preparing an active electrode material for supercapattery application by making nanocomposites of Polyaniline/Cerium (PANI/Ce) with different weight percentages of magnetite (Fe3O4). Fourier-transform infrared spectroscopy (FTIR) and x-ray diffraction (XRD) analyses supported the interaction of PANI with Ce and the formation of the successful nanocomposite with magnetite nanoparticles. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analyses showed the uniform and porous morphology of the composites. Cyclic voltammetry (CV) and galvanostatic charge–discharge (GCD) were used to test the supercapattery behavior of the nanocomposite electrodes in 1.0 M H2SO4. It was found that the supercapattery electrode of PANI/Ce+7 wt.% Fe3O4 exhibited a specific capacity of 171 mAhg−1 in the potential range of −0.2 to 1.0 V at the current density of 2.5 Ag−1. Moreover, PANI/Ce+7 wt.% Fe3O4 revealed a power density of 376.6 Wkg−1 along with a maximum energy density of 25.4 Whkg−1 at 2.5 Ag−1. Further, the cyclic stability of PANI/Ce+7 wt.% Fe3O4 was found to be 96.0% after 5,000 cycles. The obtained results suggested that the PANI/Ce+Fe3O4 nanocomposite could be a promising electrode material candidate for high-performance supercapattery applications.

scholarly journals Reduced Graphene Oxides Decorated NiSe Nanoparticles as High Performance Electrodes for Na/Li Storage

Materials ◽  
2019 ◽  
Vol 12 (22) ◽  
pp. 3709 ◽  
Author(s):  
Yan Liu ◽  
Xianshui Wang
Keyword(s):  
Electrochemical Performance ◽  
High Performance ◽  
Specific Capacity ◽  
Reversible Capacity ◽  
Graphene Oxides ◽  
One Pot ◽  
Reduced Graphene ◽  
Li Ion ◽  
Enhanced Electrochemical Performance ◽  
Li Storage

A facile, one-pot hydrothermal method was used to synthesize Nickel selenide (NiSe) nanoparticles decorated with reduced graphene oxide nanosheets (rGO), denoted as NiSe/rGO. The NiSe/rGO exhibits good electrochemical performance when tested as anodes for Na-ion batteries (SIBs) and Li-ion batteries (LIBs). An initial reversible capacity of 423 mA h g−1 is achieved for SIBs with excellent cyclability (378 mA h g−1 for 50th cycle at 0.05 A g−1). As anode for LIBs, it delivers a remarkable reversible specific capacity of 1125 mA h g−1 at 0.05 A g−1. The enhanced electrochemical performance of NiSe/rGO nanocomposites can be ascribed to the synergic effects between NiSe nanoparticles and rGO, which provide high conductivity and large specific surface area, indicating NiSe/rGO as very promising Na/Li storage materials.

Superior electrochemical performance of Li3VO4/N-doped C as an anode for Li-ion batteries

2015 ◽  
Vol 3 (35) ◽  
pp. 17951-17955 ◽  
Author(s):  
Shibing Ni ◽  
Jicheng Zhang ◽  
Jianjun Ma ◽  
Xuelin Yang ◽  
Lulu Zhang
Keyword(s):  
Electrochemical Performance ◽  
High Performance ◽  
Specific Capacity ◽  
Cycle Performance ◽  
Li Ion Batteries ◽  
High Specific Capacity ◽  
Li Ion

A high performance Li3VO4/N-doped C anode was successfully prepared, which shows high specific capacity and excellent cycle performance.

Mesoporous ZnCo2O4 microspheres as an anode material for high-performance secondary lithium ion batteries

RSC Advances ◽  
2015 ◽  
Vol 5 (25) ◽  
pp. 19241-19247 ◽  
Author(s):  
Lingyun Guo ◽  
Qiang Ru ◽  
Xiong Song ◽  
Shejun Hu ◽  
Yudi Mo
Keyword(s):  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Anode Material ◽  
High Performance ◽  
Specific Capacity ◽  
Lithium Ion ◽  
High Specific Capacity ◽  
Excellent Electrochemical Performance

The as-prepared mesoporous ZnCo2O4 microspheres showed a high specific capacity and excellent electrochemical performance when used as an anode material for lithium ion batteries.

A facile method to prepare reduced graphene oxide with nano-porous structure as electrode material for high performance capacitor

RSC Advances ◽  
2016 ◽  
Vol 6 (48) ◽  
pp. 42435-42442 ◽  
Author(s):  
Nian Yang ◽  
Xiaoyang Xu ◽  
Lingzhi Li ◽  
Heya Na ◽  
Huan Wang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Electrochemical Performance ◽  
Porous Structure ◽  
Reduced Graphene Oxide ◽  
Electrode Material ◽  
High Performance ◽  
Rate Performance ◽  
Reduced Graphene ◽  
Electrochemical Analyses ◽  
Enhanced Electrochemical Performance

Reduced graphene oxide (M-rGO) with enhanced electrochemical performance has been prepared. Electrochemical analyses show that the M-rGO has a maximum capacitance of 577.4 F g−1 at 1 mV s−1 with excellent rate performance.

ZIF-67 derived tricobalt tetroxide induced synthesis of a sandwich layered Co3O4/NiNH electrode material for high performance supercapacitors

2021 ◽  
Author(s):  
Wei Hong ◽  
Yawen Li ◽  
Yiru Wu ◽  
Guifang Li ◽  
Lishan Jia
Keyword(s):  
Energy Density ◽  
Electrode Material ◽  
Self Assembly ◽  
High Performance ◽  
Oxygen Vacancies ◽  
Specific Capacity ◽  
High Energy ◽  
High Energy Density ◽  
Cycle Stability ◽  
High Specific Capacity

The fine Co3O4 particles derived from ZIF-67 induced self-assembly of NiNH to form sandwich layered Co3O4/NiNH with oxygen vacancies which showed high specific capacity. A Co3O4/NiNH//AC supercapacitor has high energy density and cycle stability.

Shuttle-Like CuO as High-Performance Anode Materials for Lithium Ion Batteries

2017 ◽  
Vol 727 ◽  
pp. 688-692
Author(s):  
Ji Xiang Chen ◽  
Dong Lin Zhao ◽  
Ze Wen Ding ◽  
Cheng Li ◽  
Xia Jun Wang ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Specific Capacitance ◽  
High Performance ◽  
Specific Capacity ◽  
Rate Capability ◽  
Lithium Ion ◽  
High Specific Capacitance ◽  
High Energy ◽  
High Specific Capacity ◽  
Power Densities

Shuttle-like CuO has been synthesized by treating commercial Cu(OH)2 powder at room temperature for an appropriate time. As anode material of lithium-ion batteries, shuttle-like CuO exhibits high specific capacity, high stability, and good rate performance, superior to commercial CuO powder. The shuttle-like CuO exhibited a high specific capacitance of 456.8 mAh g-1 at a current density of 100 mAg-1 and maintained a good stability in 50 cycles, suggesting that it can be a promising candidate for lithium-ion batteries. The high specific capacitance and remarkable rate capability are promising for applications in lithium-ion batteries with both high energy and power densities.

scholarly journals Enhanced Reversible Zinc Ion Intercalation in Deficient Ammonium Vanadate for High-Performance Aqueous Zinc-Ion Battery

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Quan Zong ◽  
Wei Du ◽  
Chaofeng Liu ◽  
Hui Yang ◽  
Qilong Zhang ◽  
...  
Keyword(s):  
High Performance ◽  
Coulombic Efficiency ◽  
Specific Capacity ◽  
Interlayer Spacing ◽  
Zinc Ion ◽  
Carbon Cloth ◽  
High Specific Capacity ◽  
Irreversible Reaction ◽  
Ammonium Vanadate ◽  
Structure Degradation

AbstractAmmonium vanadate with bronze structure (NH4V4O10) is a promising cathode material for zinc-ion batteries due to its high specific capacity and low cost. However, the extraction of $${\text{NH}}_{{4}}^{ + }$$ NH 4 + at a high voltage during charge/discharge processes leads to irreversible reaction and structure degradation. In this work, partial $${\text{NH}}_{{4}}^{ + }$$ NH 4 + ions were pre-removed from NH4V4O10 through heat treatment; NH4V4O10 nanosheets were directly grown on carbon cloth through hydrothermal method. Deficient NH4V4O10 (denoted as NVO), with enlarged interlayer spacing, facilitated fast zinc ions transport and high storage capacity and ensured the highly reversible electrochemical reaction and the good stability of layered structure. The NVO nanosheets delivered a high specific capacity of 457 mAh g−1 at a current density of 100 mA g−1 and a capacity retention of 81% over 1000 cycles at 2 A g−1. The initial Coulombic efficiency of NVO could reach up to 97% compared to 85% of NH4V4O10 and maintain almost 100% during cycling, indicating the high reaction reversibility in NVO electrode.

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