The effect of various electrolyte cations on electrochemical performance of polypyrrole/RGO based supercapacitors

2015 ◽  
Vol 17 (43) ◽  
pp. 28666-28673 ◽  
Author(s):  
Jianbo Zhu ◽  
Youlong Xu ◽  
Jie Wang ◽  
Jun Lin ◽  
Xiaofei Sun ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Rate Capability ◽  
Cycling Stability ◽  
Capacitance Performance

Cationic mobility determines capacitance performance and rate capability in various electrolytes, while cycling stability is strongly dependent on the cationic size.

scholarly journals Nanostructure selenium compounds as pseudocapacitive electrodes for high-performance asymmetric supercapacitor

2018 ◽  
Vol 5 (1) ◽  
pp. 171186 ◽  
Author(s):  
Guofu Ma ◽  
Fengting Hua ◽  
Kanjun Sun ◽  
Enke Fenga ◽  
Hui Peng ◽  
...  
Keyword(s):  
Electrode Materials ◽  
Rate Capability ◽  
Negative Electrode ◽  
High Specific Capacitance ◽  
High Energy ◽  
Cycling Stability ◽  
High Energy Density ◽  
Storage Device ◽  
Asymmetric Supercapacitor ◽  
Capacitance Performance

The electrochemical performance of an energy conversion and storage device like the supercapacitor mainly depends on the microstructure and morphology of the electrodes. In this paper, to improve the capacitance performance of the supercapacitor, the all-pseudocapacitive electrodes of lamella-like Bi 18 SeO 29 /BiSe as the negative electrode and flower-like Co 0.85 Se nanosheets as the positive electrode are synthesized by using a facile low-temperature one-step hydrothermal method. The microstructures and morphology of the electrode materials are carefully characterized, and the capacitance performances are also tested. The Bi 18 SeO 29 /BiSe and Co 0.85 Se have high specific capacitance (471.3 F g –1 and 255 F g –1 at 0.5 A g –1 ), high conductivity, outstanding cycling stability, as well as good rate capability. The assembled asymmetric supercapacitor completely based on the pseudocapacitive electrodes exhibits outstanding cycling stability (about 93% capacitance retention after 5000 cycles). Moreover, the devices exhibit high energy density of 24.2 Wh kg –1 at a power density of 871.2 W kg –1 in the voltage window of 0–1.6 V with 2 M KOH solution.

Facile synthesis of three-dimensional flower-like MoO2–graphene nanostructures with enhanced electrochemical performance

2016 ◽  
Vol 4 (27) ◽  
pp. 10414-10418 ◽  
Author(s):  
Ying Ma ◽  
Yulong Jia ◽  
Lina Wang ◽  
Min Yang ◽  
Yingpu Bi ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Specific Capacitance ◽  
Hydrothermal Reaction ◽  
Three Dimensional ◽  
Rate Capability ◽  
Cycling Stability ◽  
Facile Synthesis ◽  
Enhanced Electrochemical Performance ◽  
Good Rate Capability ◽  
Graphene Nanostructures

Three-dimensional MoO2–G flower-like nanostructures were synthesized through a facile hydrothermal reaction and showed significantly improved specific capacitance, good rate capability and cycling stability.

A comprehensive study of the multiple effects of Y/Al substitution on O3-type NaNi0.33Mn0.33Fe0.33O2 with improved cycling stability and rate capability for Na-ion battery applications

Nanoscale ◽  
2020 ◽  
Vol 12 (32) ◽  
pp. 16831-16839
Author(s):  
Na Li ◽  
Kang Wu ◽  
Yu Lin Lee ◽  
Dang Rongbin ◽  
Xin Deng ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Bond Energy ◽  
Rate Capability ◽  
Cycling Stability ◽  
Al Substitution ◽  
The Relationship ◽  
Comprehensive Study

The relationship between bond energy and electrochemical performance was studied through substituting Mn in O3-NaNi0.33Mn0.33Fe0.33O2 oxide with Y and Al.

Overall structural modification of a layered Ni-rich cathode for enhanced cycling stability and rate capability at high voltage

2019 ◽  
Vol 7 (11) ◽  
pp. 6080-6089 ◽  
Author(s):  
Manjing Tang ◽  
Jun Yang ◽  
Nantao Chen ◽  
Shengcai Zhu ◽  
Xing Wang ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Structural Stability ◽  
High Voltage ◽  
Structural Modification ◽  
Rate Capability ◽  
Cycling Stability ◽  
Transport Kinetics

Overall structural modification, integrating coating and doping, was developed to enhance the structural stability and Li+ transport kinetics in a layered Ni-rich cathode, which significantly improves the electrochemical performance at high voltage.

A Bowknot-like RuO2 quantum dots@V2O5 cathode with largely improved electrochemical performance

2014 ◽  
Vol 16 (35) ◽  
pp. 18680-18685 ◽  
Author(s):  
Xiujuan Wei ◽  
Qinyou An ◽  
Qiulong Wei ◽  
Mengyu Yan ◽  
Xuanpeng Wang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Electrochemical Performance ◽  
Rate Capability ◽  
Cycling Stability

A Bowknot-like RuO2 quantum dots@V2O5 cathode exhibits superior rate capability and cycling stability.

scholarly journals A multifunctional phosphite-containing electrolyte for 5 V-class LiNi0.5Mn1.5O4 cathodes with superior electrochemical performance

2014 ◽  
Vol 2 (25) ◽  
pp. 9506-9513 ◽  
Author(s):  
Young-Min Song ◽  
Jung-Gu Han ◽  
Soojin Park ◽  
Kyu Tae Lee ◽  
Nam-Soon Choi
Keyword(s):  
Electrochemical Performance ◽  
Electrochemical Properties ◽  
Surface Film ◽  
Rate Capability ◽  
Cycling Stability ◽  
Surface Modified

An organic–inorganic based surface film was formed on a 5 V-class LiNi0.5Mn1.5O4 cathode by tris(trimethylsilyl)phosphite (TMSP). This surface-modified cathode exhibited significantly improved electrochemical properties in terms of cycling stability and rate capability.

Preparation of urchin-like NiCo2O4 material and studies of its electrochemical performance for supercapacitors

2019 ◽  
Vol 12 (03) ◽  
pp. 1950026 ◽  
Author(s):  
Lili Wang ◽  
Yanxia Huang ◽  
Xiaoshan Li ◽  
Hang Ma ◽  
Chenghang You ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Specific Capacitance ◽  
Hydrothermal Process ◽  
Rate Capability ◽  
Cycling Stability ◽  
A Value ◽  
Excellent Electrochemical Performance ◽  
Good Cycling Stability ◽  
Good Rate Capability

The paper reports a kind of NiCo2O4 material with urchin-like morphology. This material was prepared using a facile strategy of hydrothermal process followed by calcinations, and exhibits an excellent electrochemical performance. For example, it delivers a specific capacitance high up to 1167[Formula: see text]Fg[Formula: see text] at 1[Formula: see text]Ag[Formula: see text] and still retains a value of 1095[Formula: see text]Fg[Formula: see text] at 10[Formula: see text]Ag[Formula: see text], showing a good rate capability; after suffering from 3000 cycles at 10[Formula: see text]A[Formula: see text]g[Formula: see text], the specific capacitance has only a decay of 12%, presenting a good cycling stability.

Improved structural and electrochemical performances of LiNi0.5Mn1.5O4 cathode materials by Cr3+ and/or Ti4+ doping

RSC Advances ◽  
2015 ◽  
Vol 5 (121) ◽  
pp. 99856-99865 ◽  
Author(s):  
Li Wang ◽  
Dan Chen ◽  
Jiangfeng Wang ◽  
Guijuan Liu ◽  
Wei Wu ◽  
...  
Keyword(s):  
Diffusion Coefficient ◽  
Electrochemical Performance ◽  
Cathode Materials ◽  
Rate Capability ◽  
Cycling Stability ◽  
Electrochemical Performances ◽  
Ion Diffusion ◽  
Ti Doping ◽  
Co Doped

The Cr and/or Ti doping leads to the enhanced rate capability and cycling stability. The co-doped sample exhibits the optimal electrochemical performance due to the presence of appropriate Mn3+ content and higher Li+ ion diffusion coefficient.

Ultrahigh rate capability and long cycling stability of dual-ion batteries enabled by TiO2 microspheres with abundant oxygen vacancies

2020 ◽  
Vol 56 (58) ◽  
pp. 8039-8042 ◽  
Author(s):  
Tong Mu ◽  
Jiguang Zhang ◽  
Rui Shi ◽  
Yunfeng Zhu ◽  
Jinglian Zhu ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Oxygen Vacancies ◽  
Rate Capability ◽  
Cycling Stability ◽  
Li Ion Batteries ◽  
Li Ion ◽  
Tio2 Microspheres

By introducing oxygen vacancies, TiO2 microspheres exhibit outstanding electrochemical performance for dual Mg/Li-ion batteries.

scholarly journals A porous graphene–NiFe2O4 nanocomposite with high electrochemical performance and high cycling stability for energy storage applications

2020 ◽  
Vol 2 (9) ◽  
pp. 4229-4241 ◽  
Author(s):  
Meenaketan Sethi ◽  
U. Sandhya Shenoy ◽  
D. Krishna Bhat
Keyword(s):  
Energy Storage ◽  
Electrochemical Performance ◽  
Solvothermal Synthesis ◽  
Rate Capability ◽  
High Specific Capacitance ◽  
Cycling Stability ◽  
High Rate ◽  
High Rate Capability ◽  
Porous Graphene ◽  
Energy Storage Applications

Solvothermal synthesis of a porous graphene–NiFe2O4 nanocomposite exhibiting high specific capacitance and high rate capability along with high cycling stability.

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