Flexible Mn-decorated NiCo2S4 core–shell nanowire arrays for a high performance hybrid supercapacitor electrode with a long cycle life

CrystEngComm ◽  
2018 ◽  
Vol 20 (33) ◽  
pp. 4735-4744 ◽  
Author(s):  
Chang Liu ◽  
Xiang Wu ◽  
Hui Xia
Keyword(s):  
Energy Density ◽  
Power Density ◽  
High Performance ◽  
Nanowire Arrays ◽  
Core Shell ◽  
Hybrid Supercapacitor ◽  
Supercapacitor Electrode ◽  
Long Cycle Life ◽  
Asymmetric Hybrid ◽  
Shell Nanowires

In this work, an asymmetric hybrid supercapacitor assembled by utilizing 0.5Mn–NiCo2S4 core–shell nanowires as the positive electrode achieves a relatively high volumetric energy density of 8.80 mW h cm−3 at a volumetric power density of 220.103 mW cm−3.

scholarly journals Hierarchical Carbon Microtube@Nanotube Core–Shell Structure for High-Performance Oxygen Electrocatalysis and Zn–Air Battery

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
Wenfu Xie ◽  
Jianming Li ◽  
Yuke Song ◽  
Shijin Li ◽  
Jianbo Li ◽  
...  
Keyword(s):  
Energy Density ◽  
Power Density ◽  
High Power ◽  
High Performance ◽  
Rational Design ◽  
Specific Capacity ◽  
High Mass ◽  
Core Shell ◽  
High Power Density ◽  
Mass Loading

AbstractZinc–air batteries (ZABs) hold tremendous promise for clean and efficient energy storage with the merits of high theoretical energy density and environmental friendliness. However, the performance of practical ZABs is still unsatisfactory because of the inevitably decreased activity of electrocatalysts when assembly into a thick electrode with high mass loading. Herein, we report a hierarchical electrocatalyst based on carbon microtube@nanotube core–shell nanostructure (CMT@CNT), which demonstrates superior electrocatalytic activity for oxygen reduction reaction and oxygen evolution reaction with a small potential gap of 0.678 V. Remarkably, when being employed as air–cathode in ZAB, the CMT@CNT presents an excellent performance with a high power density (160.6 mW cm−2), specific capacity (781.7 mAhg Zn −1 ) as well as long cycle stability (117 h, 351 cycles). Moreover, the ZAB performance of CMT@CNT is maintained well even under high mass loading (3 mg cm−2, three times as much as traditional usage), which could afford high power density and energy density for advanced electronic equipment. We believe that this work is promising for the rational design of hierarchical structured electrocatalysts for advanced metal-air batteries.

scholarly journals Synthesis of bimetallic nickel cobalt selenide particles for high-performance hybrid supercapacitors

RSC Advances ◽  
2022 ◽  
Vol 12 (3) ◽  
pp. 1471-1478
Author(s):  
Bei Jiang ◽  
Yang Liu ◽  
Jingchao Zhang ◽  
Yinhuan Wang ◽  
Xinyu Zhang ◽  
...  
Keyword(s):  
Energy Density ◽  
Power Density ◽  
High Performance ◽  
Hybrid Supercapacitor ◽  
Hybrid Supercapacitors ◽  
Nickel Cobalt ◽  
Cobalt Selenide

The litchi-like Ni–Co selenide constructed Ni0.95Co2.05Se4//AC hybrid supercapacitor achieves an energy density of 37.22 W h kg−1 and a power density of 800.90 W kg−1. The ASC device can retain 95.21% of the original capacity after 4000 cycles.

Rutile-TiO2 decorated Li4Ti5O12 nanosheet arrays with 3D interconnected architecture as anodes for high performance hybrid supercapacitors

2015 ◽  
Vol 3 (46) ◽  
pp. 23570-23576 ◽  
Author(s):  
Lin Gao ◽  
Dekang Huang ◽  
Yan Shen ◽  
Mingkui Wang
Keyword(s):  
Energy Density ◽  
Power Density ◽  
High Performance ◽  
Ultrahigh Energy ◽  
Hybrid Supercapacitor ◽  
Rutile Tio2 ◽  
Hybrid Supercapacitors ◽  
Nanosheet Arrays

A hybrid supercapacitor exhibits an ultrahigh energy density of 74.85 W h kg−1 at a power density of 300 W kg−1.

Stable and enhanced electrochemical performance based on hierarchical core-shell structure of CoMn2O4@Ni3S2 electrode for hybrid supercapacitor

2021 ◽  
Author(s):  
Qing Xu ◽  
Yintao Wang ◽  
Suci Meng ◽  
Deli Jiang ◽  
Min Chen
Keyword(s):  
Current Density ◽  
Shell Structure ◽  
High Performance ◽  
Specific Capacity ◽  
Strong Stability ◽  
High Energy ◽  
High Energy Density ◽  
Core Shell ◽  
Hybrid Supercapacitor ◽  
Supercapacitor Electrode

Abstract Herein, accessible and low-cost CoMn2O4@Ni3S2 core-shell nanoneedle arrays have been prepared via a two-step approach comprised with hydrothermal-calcination and electrochemical deposition procedures, successfully. In the beginning, CoMn2O4 nanoneedle arrays took root on Ni foam to form the core skeleton and subsequently, hierarchical Ni3S2 nanosheets uniformly overlaid on the surface of CoMn2O4 nanoneedles shaping the shell structure. This CoMn2O4@Ni3S2 material was measured directly as supercapacitor electrode and presented high specific capacity of 192.2 mAh g-1 with current density of 1 A g-1. Besides, the electrode delivered outstanding cyclical stability as the capacity retention attained 90.2 % after charge-discharge measurement at a large current density of 10 A g-1 for 10000 cycles. Furthermore, a hybrid supercapacitor assembled by CoMn2O4@Ni3S2 anode and activated carbon cathode represented a high energy density of 51.2 Wh kg-1 with the power density of 1030.0 W kg-1. This work shows a facile and inexpensive procedure to design high-performance and strong-stability supercapacitor electrodes.

scholarly journals In Situ Fabrication of Activated Carbon from a Bio-Waste Desmostachya bipinnata for the Improved Supercapacitor Performance

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Gopal Krishna Gupta ◽  
Pinky Sagar ◽  
Sumit Kumar Pandey ◽  
Monika Srivastava ◽  
A. K. Singh ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Energy Density ◽  
Power Density ◽  
Supercapacitor Electrode ◽  
In Situ Fabrication ◽  
Transmission Electron ◽  
Good Energy ◽  
Supercapacitor Performance ◽  
Operating Potential

AbstractHerein, we demonstrate the fabrication of highly capacitive activated carbon (AC) using a bio-waste Kusha grass (Desmostachya bipinnata), by employing a chemical process followed by activation through KOH. The as-synthesized few-layered activated carbon has been confirmed through X-ray powder diffraction, transmission electron microscopy, and Raman spectroscopy techniques. The chemical environment of the as-prepared sample has been accessed through FTIR and UV–visible spectroscopy. The surface area and porosity of the as-synthesized material have been accessed through the Brunauer–Emmett–Teller method. All the electrochemical measurements have been performed through cyclic voltammetry and galvanometric charging/discharging (GCD) method, but primarily, we focus on GCD due to the accuracy of the technique. Moreover, the as-synthesized AC material shows a maximum specific capacitance as 218 F g−1 in the potential window ranging from − 0.35 to + 0.45 V. Also, the AC exhibits an excellent energy density of ~ 19.3 Wh kg−1 and power density of ~ 277.92 W kg−1, respectively, in the same operating potential window. It has also shown very good capacitance retention capability even after 5000th cycles. The fabricated supercapacitor shows a good energy density and power density, respectively, and good retention in capacitance at remarkably higher charging/discharging rates with excellent cycling stability. Henceforth, bio-waste Kusha grass-derived activated carbon (DP-AC) shows good promise and can be applied in supercapacitor applications due to its outstanding electrochemical properties. Herein, we envision that our results illustrate a simple and innovative approach to synthesize a bio-waste Kusha grass-derived activated carbon (DP-AC) as an emerging supercapacitor electrode material and widen its practical application in electrochemical energy storage fields.

Hierarchically 3D Nanoporous Structured Co9S8@Nix:Moy–Se Core–shell Nanowire Arrays Electrode for the High-performance Asymmetric Supercapacitors

2021 ◽  
Author(s):  
Dai Jiu Yi ◽  
Soram Bobby Singh ◽  
Nam Hoon Kim ◽  
Joong Hee Lee
Keyword(s):  
Energy Conversion ◽  
High Performance ◽  
Rational Design ◽  
Electrode Materials ◽  
Storage Systems ◽  
Nanowire Arrays ◽  
Core Shell ◽  
Good Strategy ◽  
Free Standing ◽  
Asymmetric Supercapacitors

The rational design of free-standing hierarchic core–shell nanoporous architectures is a good strategy for fabricating next-generation electrode materials for application to electrochemical energy conversion/storage systems. Herein, hierarchical core–shell 3D Co9S8@Nix:Moy–Se...

Sign in / Sign up

Export Citation Format

Share Document