High performance polyanthraquinone/Co–Ni(OH)2 aqueous batteries based on hydroxyl and potassium insertion/extraction reactions

2020 ◽  
Vol 4 (1) ◽  
pp. 132-137 ◽  
Author(s):  
Chang Liu ◽  
Ting Ma ◽  
Kexin Xia ◽  
Xuesen Hou ◽  
Qingshun Nian ◽  
...  
Keyword(s):  
Power Density ◽  
High Performance ◽  
Cycling Performance ◽  
High Energy ◽  
Aqueous Batteries

A high performance poly(1,4-anthraquinone)/Ni(OH)2 dual-ion battery is designed with high energy/power density and good cycling performance.

Facile Synthesis of Uniform Carbon Coated Li2S/rGO cathode for High-Performance Lithium-Sulfur Batteries

MRS Advances ◽  
2018 ◽  
Vol 3 (60) ◽  
pp. 3501-3506 ◽  
Author(s):  
Gaind P. Pandey ◽  
Joshua Adkins ◽  
Lamartine Meda
Keyword(s):  
High Performance ◽  
Active Material ◽  
Cycling Performance ◽  
High Energy ◽  
High Energy Density ◽  
Shell Nanostructures ◽  
Lithium Sulfur Batteries ◽  
Carbon Coated ◽  
Co Precipitation ◽  
Lithium Sulfur

ABSTRACTLithium sulfide (Li2S) is one of the most attractive cathode materials for high energy density lithium batteries as it has a high theoretical capacity of 1166 mA h g-1. However, Li2S suffers from poor rate performance and short cycle life due to its insulating nature and polysulfide shuttle during cycling. In this work, we report a facile and viable approach to address these issues. We propose a method to synthesize a Li2S based nanocomposite cathode material by dissolving Li2S as the active material, polyvinylpyrrolidone (PVP) as the carbon precursor, and graphene oxide (GO) as a matrix to enhance the conductivity, followed by a co-precipitation and high-temperature carbonization process. The Li2S/rGO cathode yields an exceptionally high initial capacity of 817 mAh g-1 based on Li2S mass at C/20 rate and also shows a good cycling performance. The carbon-coated Li2S/rGO cathode demonstrates the capability of robust core-shell nanostructures for different rates and improved capacity retention, revealing carbon coated Li2S/rGO composites as an outstanding system for high-performance lithium-sulfur batteries.

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.

Low-cost high-performance asymmetric supercapacitors based on Co2AlO4@MnO2 nanosheets and Fe3O4 nanoflakes

2016 ◽  
Vol 4 (6) ◽  
pp. 2096-2104 ◽  
Author(s):  
Fei Li ◽  
Hao Chen ◽  
Xiao Ying Liu ◽  
Shi Jin Zhu ◽  
Jia Qi Jia ◽  
...  
Keyword(s):  
Power Density ◽  
High Performance ◽  
Low Cost ◽  
High Energy ◽  
Wearable Electronics ◽  
Asymmetric Supercapacitors ◽  
Power Sources ◽  
Mno2 Nanosheets ◽  
Increasing Demand

The development of portable and wearable electronics has promoted the increasing demand for high-performance power sources with high energy/power density, low cost, lightweight, as well as ultrathin and flexible features.

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.

High-performance asymmetric supercapacitors based on monodisperse MnO nanocrystals with high energy densities

Nanoscale ◽  
2018 ◽  
Vol 10 (34) ◽  
pp. 15926-15931 ◽  
Author(s):  
Menggang Li ◽  
Wenjuan Lei ◽  
Yongsheng Yu ◽  
Weiwei Yang ◽  
Ji Li ◽  
...  
Keyword(s):  
High Performance ◽  
Cycling Performance ◽  
High Energy ◽  
Asymmetric Supercapacitor ◽  
Asymmetric Supercapacitors

An asymmetric supercapacitor based on monodisperse MnO nanocrystals exhibited excellent cycling performance and high energy densities.

Two-Dimensional Imine-Based Covalent-Organic-Framework Derived Nitrogen-Doped Porous Carbon Nanosheets for High-Performance Lithium-Sulfur Batteries

2021 ◽  
Author(s):  
Chaofei Guo ◽  
Jiaojiao Xu ◽  
Li-Ping Lv ◽  
Shuangqiang Chen ◽  
Weiwei Sun ◽  
...  
Keyword(s):  
High Performance ◽  
Cycling Performance ◽  
High Energy ◽  
High Energy Density ◽  
Carbon Nanosheets ◽  
Nitrogen Doped ◽  
Lithium Sulfur Batteries ◽  
High Theoretical Capacity ◽  
Low Sulfur ◽  
Lithium Sulfur

Lithium-sulfur batteries are attracting more attention for high theoretical capacity and high energy density. And in order to overcome the problem of short cycling performance, low sulfur loading and shuttle...

Hierarchical nanoarchitectured hybrid electrodes based on ultrathin MoSe2 nanosheets on 3D ordered macroporous carbon frameworks for high-performance sodium-ion batteries

2020 ◽  
Vol 8 (5) ◽  
pp. 2843-2850 ◽  
Author(s):  
Yuanlin Liu ◽  
Nana Wang ◽  
Xunhua Zhao ◽  
Zhiwei Fang ◽  
Xiao Zhang ◽  
...  
Keyword(s):  
Power Density ◽  
High Performance ◽  
High Energy ◽  
Carbon Skeleton ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
Ordered Macroporous ◽  
Energy And Power Density ◽  
Macroporous Carbon

3DOM MoSe2@C constructed by ultrathin MoSe2 nanosheets strongly binging on 3DOM carbon skeleton exerts high energy and power density for sodium-ion batteries.

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.

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.

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