scholarly journals Preparation of a NbN/graphene nanocomposite by solution impregnation and its application in high-performance Li-ion hybrid capacitors

RSC Advances ◽  
2017 ◽  
Vol 7 (32) ◽  
pp. 19967-19975 ◽  
Author(s):  
Zhen-Kun Chen ◽  
Jun-Wei Lang ◽  
Ling-Yang Liu ◽  
Ling-Bin Kong
Keyword(s):  
Energy Density ◽  
Power Density ◽  
High Performance ◽  
High Energy ◽  
High Energy Density ◽  
Graphene Nanocomposite ◽  
Li Ion ◽  
Hybrid Capacitors

Freestanding NbN/graphene papers were used in Li-ion hybrid capacitors and exhibit high energy density and power density.

scholarly journals In situ construction of yolk–shell zinc cobaltite with uniform carbon doping for high performance asymmetric supercapacitors

2018 ◽  
Vol 6 (19) ◽  
pp. 9109-9115 ◽  
Author(s):  
Xiaoya Chang ◽  
Lei Zang ◽  
Song Liu ◽  
Mengying Wang ◽  
Huinan Guo ◽  
...  
Keyword(s):  
Energy Density ◽  
Power Density ◽  
High Performance ◽  
High Energy ◽  
Carbon Doping ◽  
High Energy Density ◽  
Asymmetric Supercapacitors

Yolk–shell ZnCo2O4 with in situ formed carbon shows great potential for supercapacitors, which delivers high energy density and power density.

High-Performance Asymmetric Supercapacitors Based on the Ni1.5Co1.5S4@CNTs Nanocomposites

NANO ◽  
2020 ◽  
Vol 15 (10) ◽  
pp. 2050136
Author(s):  
Xuan Zheng ◽  
Xingxing He ◽  
Jinlong Jiang ◽  
Zhengfeng Jia ◽  
Yu Li ◽  
...  
Keyword(s):  
Energy Density ◽  
Power Density ◽  
High Performance ◽  
Specific Capacity ◽  
Negative Electrode ◽  
High Energy ◽  
Cycling Stability ◽  
Power Delivery ◽  
High Energy Density ◽  
Practical Applications

In this paper, the Ni[Formula: see text]Co[Formula: see text]S4@CNTs nanocomposites containing different carbon nanotubes (CNT) content were prepared by a one-step hydrothermal method. More hydroxyl and carboxyl groups were introduced on the surface of CNTs by acidizing treatment to increase the dispersion of CNTs. The acid-treated CNTs can more fully compound with Ni[Formula: see text]Co[Formula: see text]S4 nanoparticles to form heterostructure. When the CNTs content is 10[Formula: see text]wt.%, the Ni[Formula: see text]Co[Formula: see text]S4@CNTs-10 nanocomposite exhibits the highest specific capacity of 210[Formula: see text]mAh[Formula: see text]g[Formula: see text] in KOH aqueous electrolytes at current density of 1[Formula: see text]A[Formula: see text]g[Formula: see text]. The superior performances of the Ni[Formula: see text]Co[Formula: see text]S4@CNTs-10 nanocomposite are attributed to the effective synergic effects of the high specific capacity of Ni[Formula: see text]Co[Formula: see text]S4 and the excellent conductivity of CNTs. An asymmetric supercapacitor (ASC) was assembled based on Ni[Formula: see text]Co[Formula: see text]S4@CNTs-10 positive electrode and activated carbon (AC) negative electrode, which delivers a high energy density of 61.2[Formula: see text]Wh[Formula: see text]kg[Formula: see text] at a power density of 800[Formula: see text]W[Formula: see text]kg[Formula: see text], and maintains 34.8[Formula: see text]Wh[Formula: see text]kg[Formula: see text] at a power density of 16079[Formula: see text]W[Formula: see text]kg[Formula: see text]. Also, the ASC device shows an excellent cycling stability with 91.49% capacity retention and above 94% Columbic efficiency after 10 000 cycles at 10[Formula: see text]A[Formula: see text]g[Formula: see text]. This aqueous asymmetric Ni[Formula: see text]Co[Formula: see text]S4@CNTs//AC supercapacitor is promising for practical applications due to its advantages such as high energy density, power delivery and cycling stability.

scholarly journals Blow-spun N-doped carbon fiber based high performance flexible lithium ion capacitors

RSC Advances ◽  
2020 ◽  
Vol 10 (17) ◽  
pp. 9833-9839
Author(s):  
Changzhen Zhan ◽  
Jianan Song ◽  
Xiaolong Ren ◽  
Yang Shen ◽  
Hui Wu ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Energy Density ◽  
Power Density ◽  
High Power ◽  
High Performance ◽  
Lithium Ion ◽  
High Energy ◽  
High Energy Density ◽  
High Power Density ◽  
Hybrid Supercapacitors

Constructing flexible hybrid supercapacitors is a feasible way to achieve devices with high energy density, high power density and flexibility at the same time.

scholarly journals Hierarchical porous graphitic carbon for high-performance supercapacitors at high temperature

RSC Advances ◽  
2017 ◽  
Vol 7 (55) ◽  
pp. 34488-34496 ◽  
Author(s):  
Chong Chen ◽  
Dengfeng Yu ◽  
Gongyuan Zhao ◽  
Lei Sun ◽  
Yinyong Sun ◽  
...  
Keyword(s):  
High Temperature ◽  
Energy Density ◽  
Power Density ◽  
High Performance ◽  
High Energy ◽  
Porous Graphitic Carbon ◽  
Graphitic Carbon ◽  
Cycle Life ◽  
High Energy Density ◽  
Hierarchical Porous

Developing supercapacitors with high energy density without sacrificing the power density and cycle life has attracted enormous attention.

scholarly journals A General Self-Sacrifice Template Strategy to 3D Heteroatom-Doped Macroporous Carbon for High-Performance Potassium-Ion Hybrid Capacitors

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Junwei Li ◽  
Xiang Hu ◽  
Guobao Zhong ◽  
Yangjie Liu ◽  
Yaxin Ji ◽  
...  
Keyword(s):  
Energy Density ◽  
High Performance ◽  
Density Functional ◽  
High Energy ◽  
Potassium Ion ◽  
High Energy Density ◽  
Capacitance Performance ◽  
Hybrid Capacitors ◽  
Co Doped ◽  
Macroporous Carbon

AbstractPotassium-ion hybrid capacitors (PIHCs) tactfully combining capacitor-type cathode with battery-type anode have recently attracted increasing attentions due to their advantages of decent energy density, high power density, and low cost; the mismatches of capacity and kinetics between capacitor-type cathode and battery-type anode in PIHCs yet hinder their overall performance output. Herein, based on prediction of density functional theory calculations, we find Se/N co-doped porous carbon is a promising candidate for K+ storage and thus develop a simple and universal self-sacrifice template method to fabricate Se and N co-doped three-dimensional (3D) macroporous carbon (Se/N-3DMpC), which features favorable properties of connective hierarchical pores, expanded interlayer structure, and rich activity site for boosting pseudocapacitive activity and kinetics toward K+ storage anode and enhancing capacitance performance for the reversible anion adsorption/desorption cathode. As expected, the as-assembled PIHCs full cell with a working voltage as high as 4.0 V delivers a high energy density of 186 Wh kg−1 and a power output of 8100 W kg−1 as well as excellent long service life. The proof-of-concept PIHCs with excellent performance open a new avenue for the development and application of high-performance hybrid capacitors.

Nb2O5 nanoparticles encapsulated in ordered mesoporous carbon matrix as advanced anode materials for Li ion capacitors

RSC Advances ◽  
2016 ◽  
Vol 6 (75) ◽  
pp. 71338-71344 ◽  
Author(s):  
Jingjie Wang ◽  
Hongsen Li ◽  
Laifa Shen ◽  
Shengyang Dong ◽  
Xiaogang Zhang
Keyword(s):  
Activated Carbon ◽  
Energy Density ◽  
Mesoporous Carbon ◽  
Anode Materials ◽  
High Performance ◽  
Carbon Matrix ◽  
High Energy ◽  
High Energy Density ◽  
Ordered Mesoporous ◽  
Li Ion

A high performance Li ion capacitor was constructed with Nb2O5/CMK-3 as anode and activated carbon as cathode, which demonstrated high energy density and power density benefit from the combination of the merits of batteries and supercapacitors.

High Energy-Density Supercapacitor, Enabled by Carbon Nanostructures

2020 ◽  
Author(s):  
Christopher Scott Carley ◽  
Danny J. Espinoza ◽  
José Luis Reyes-Rodríguez ◽  
Ethan C. Ahn
Keyword(s):  
Energy Density ◽  
Power Density ◽  
Carbon Nanostructures ◽  
High Performance ◽  
Renewable Energy Sources ◽  
Lithium Ion ◽  
High Energy ◽  
Experimental Methodology ◽  
High Energy Density ◽  
Energy Storage Devices

The rapidly increasing demand for renewable energy sources has revived interest in energy storage devices due to the intermittent nature of energy generated from these sources (e.g., solar, wind). Compared to lithium-ion batteries and hydrogen fuel cells, supercapacitors exhibit superior power-density (W/kg), enabling fast charging/discharging cycles. Although supercapacitors generally promise long life-cycle and a robust thermal operating range, a relatively low energy-density (Wh/kg) still remains the greatest challenge. This research presents a relatively simple, low-cost experimental methodology to develop all solid-state, flexible, and high-performance supercapacitor devices. The interdigitated electrodes will consist of two different types of solution-processable carbon nanostructures – namely, reduced graphene oxide (rGO) and single-walled carbon nanotube (SWCNT). We developed models to better guide the experimental work while predicting the power-density and energy-density characteristics of supercapacitors with varying physical dimensions.

Pseudocapacitive behaviours of Na2Ti3O7@CNT coaxial nanocables for high-performance sodium-ion capacitors

2015 ◽  
Vol 3 (42) ◽  
pp. 21277-21283 ◽  
Author(s):  
Shengyang Dong ◽  
Laifa Shen ◽  
Hongsen Li ◽  
Ping Nie ◽  
Yaoyao Zhu ◽  
...  
Keyword(s):  
Energy Density ◽  
Electrochemical Performance ◽  
Power Density ◽  
High Power ◽  
High Performance ◽  
High Energy ◽  
Sodium Ion ◽  
High Energy Density ◽  
High Power Density ◽  
Coaxial Nanocables

Pseudocapacitive behaviours of Na2Ti3O7@CNTs enhance the electrochemical performance of Na-ion capacitors with high energy density and high power density.

Nitrogen-doped carbon nanotubes as an anode for a highly robust potassium-ion hybrid capacitor

2020 ◽  
Vol 5 (12) ◽  
pp. 1586-1595
Author(s):  
Xiuqi Li ◽  
Maoxin Chen ◽  
Lei Wang ◽  
Hanjiao Xu ◽  
Jiang Zhong ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Energy Density ◽  
Power Density ◽  
High Energy ◽  
Potassium Ion ◽  
High Energy Density ◽  
Nitrogen Doped ◽  
Nitrogen Doped Carbon ◽  
Hybrid Capacitors

Novel N-doped carbon nanotubes (NCNTs) were synthesized as an anode for high energy density and power density potassium-ion hybrid capacitors.

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