Encapsulation of zinc hexacyanoferrate nanocubes with manganese oxide nanosheets for high-performance rechargeable zinc ion batteries

2017 ◽  
Vol 5 (45) ◽  
pp. 23628-23633 ◽  
Author(s):  
Ke Lu ◽  
Bin Song ◽  
Yuxin Zhang ◽  
Houyi Ma ◽  
Jintao Zhang
Keyword(s):  
Manganese Oxide ◽  
Redox Reactions ◽  
High Performance ◽  
Zinc Ion ◽  
Reversible Redox ◽  
Zinc Hexacyanoferrate

The encapsulation of zinc hexacyanoferrate nanocubes with manganese oxide nanosheets enables the combination of intercalative core nanocube and capacitive shell together with reversible redox reactions for enhancing performance of Zn-ion batteries.

Electrochemical Charge Storage Performance of Mesoporous MoO3@Co3O4 Nanocomposites as Electrode Materials

2021 ◽  
Author(s):  
Dillip Kumar Mohapatra ◽  
Swetapadma Praharaj ◽  
Dibyaranjan Rout
Keyword(s):  
Redox Reactions ◽  
High Performance ◽  
Electrode Materials ◽  
Coulombic Efficiency ◽  
Average Pore Size ◽  
Electrochemical Capacitors ◽  
Bet Surface Area ◽  
Average Pore ◽  
Storage Performance ◽  
Reversible Redox

Abstract Constructing a novel nanocomposite structure based on Co3O4 is of the current interest to design and develop efficient electrochemical capacitors. The capacitive performance of MoO3@Co3O4 nanocomposite is compared with pristine Co3O4 nanoparticles, both of them being synthesized by hydrothermal technique. A BET surface area of ~41 m2g-1 (almost twice that of Co3O4 )and average pore size of 3.6 nm is found to be suitable for promoting Faradaic reactions in the nanocomposite. Electrochemical measurements conducted on both samples predict capacitive behavior with quasi-reversible redox reactions. MoO3@Co3O4 nanocomposite is capable of delivering a superior specific capacitance of 1248 Fg-1 at 0.5 Ag-1 along with notable stability of 92% even after 2000 cycles of charge-discharge and Coulombic efficiency approaching 100% at 10 Ag-1. The outstanding results obtained in this work assure functional adequacy of MoO3@Co3O4 nanocomposite in fabricating high-performance electrochemical capacitors.

HxMoO3−y nanobelts with sea water as electrolyte for high-performance pseudocapacitors and desalination devices

2015 ◽  
Vol 3 (33) ◽  
pp. 17217-17223 ◽  
Author(s):  
Liang Huang ◽  
Xiang Gao ◽  
Qiang Dong ◽  
Zhimi Hu ◽  
Xu Xiao ◽  
...  
Keyword(s):  
Specific Capacitance ◽  
Double Layer ◽  
Redox Reactions ◽  
High Performance ◽  
Sea Water ◽  
Reversible Redox ◽  
Electrochemical Double Layer Capacitors ◽  
Electrochemical Double Layer ◽  
Double Layer Capacitors

Pseudocapacitors, which store charge through fast reversible redox reactions occuring at the surface of the electrode, could offer a higher specific capacitance than electrochemical double-layer capacitors (EDLCs).

An oxygen-deficient cobalt-manganese oxide nanowire doped with P designed for high performance asymmetric supercapacitor

2021 ◽  
Vol 379 ◽  
pp. 138178 ◽  
Author(s):  
Feifei Xiang ◽  
Xinyi Zhou ◽  
Xiaoqiu Yue ◽  
Qiang Hu ◽  
Qiaoji Zheng ◽  
...  
Keyword(s):  
Manganese Oxide ◽  
High Performance ◽  
Asymmetric Supercapacitor

scholarly journals Ultralong π-Conjugated Bis(terpyridine)metal Polymer Wires Covalently Bound to a Carbon Electrode: Fast Redox Conduction and Redox Diode Characteristics

Molecules ◽  
2021 ◽  
Vol 26 (14) ◽  
pp. 4267
Author(s):  
Kuo-Hui Wu ◽  
Ryota Sakamoto ◽  
Hiroaki Maeda ◽  
Eunice Jia Han Phua ◽  
Hiroshi Nishihara
Keyword(s):  
Metal Complex ◽  
Electrochemical Method ◽  
Redox Reactions ◽  
Cyclic Voltammograms ◽  
Wire Arrays ◽  
Reversible Redox ◽  
Complex Linear ◽  
Complex Polymer ◽  
Metal Polymer ◽  
Hclo4 Solution

We developed an efficient and convenient electrochemical method to synthesize π-conjugated redox metal-complex linear polymer wires composed of azobenzene-bridged bis(terpyridine)metal (2-M, M = Fe, Ru) units covalently immobilized on glassy carbon (GC). Polymerization proceeds by electrochemical oxidation of bis(4′-(4-anilino)-2,2′:6′,2″-terpyridine)metal (1-M) in a water–acetonitrile–HClO4 solution, affording ultralong wires up to 7400 mers (corresponding to ca. 15 μm). Both 2-Fe and 2-Ru undergo reversible redox reactions, and their redox behaviors indicate remarkably fast redox conduction. Anisotropic hetero-metal-complex polymer wires with Fe and Ru centers are constructed via stepwise electropolymerization. The cyclic voltammograms of two hetero-metal-complex polymer wires, GC/[2-Fe]–[2-Ru] (3) and GC/[2-Ru]–[2-Fe] (4), show irreversible redox reactions with opposite electron transfer characteristics, indicating redox diodelike behavior. In short, the present electrochemical method is useful to synthesize polymer wire arrays and to integrate functional molecules on carbon.

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.

A High-Performance Free-Standing Zn Anode for Flexible Zinc-Ion Batteries

Nanoscale ◽  
2021 ◽  
Author(s):  
Chenxi Gao ◽  
Jiawei Wang ◽  
Yuan Huang ◽  
Zixuan Li ◽  
Jiyan Zhang ◽  
...  
Keyword(s):  
Energy Density ◽  
High Performance ◽  
Low Cost ◽  
High Energy ◽  
Zinc Ion ◽  
High Energy Density ◽  
Free Standing ◽  
Energy Device ◽  
Zn Anode ◽  
Significant Attention

Zinc-ion batteries (ZIBs) have attracted significant attention owing to their high safety, high energy density, and low cost. ZIBs have been studied as a potential energy device for portable and...

Vanadium‐Containing Layered Materials as High‐Performance Cathodes for Aqueous Zinc‐Ion Batteries

2021 ◽  
pp. 2100505
Author(s):  
Courtney‐Elyce M. Lewis ◽  
Joseph F. S. Fernando ◽  
Dumindu P. Siriwardena ◽  
Konstantin L. Firestein ◽  
Chao Zhang ◽  
...  
Keyword(s):  
High Performance ◽  
Layered Materials ◽  
Zinc Ion

Crystal water enlarging the interlayer spacing of ultrathin V2O5·4VO2·2.72H2O nanobelts for high-performance aqueous zinc-ion battery

2021 ◽  
Vol 411 ◽  
pp. 128533
Author(s):  
Ting-Ting Lv ◽  
Yang-Yi Liu ◽  
Hai Wang ◽  
Sheng-Yang Yang ◽  
Chun-Sen Liu ◽  
...  
Keyword(s):  
High Performance ◽  
Interlayer Spacing ◽  
Zinc Ion ◽  
Crystal Water
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