Preparation of size-selective Mn3O4 hexagonal nanoplates with superior electrochemical properties for pseudocapacitors

2015 ◽  
Vol 17 (35) ◽  
pp. 23017-23025 ◽  
Author(s):  
Guiling Wang ◽  
Zhipeng Ma ◽  
Yuqian Fan ◽  
Guangjie Shao ◽  
Lingxue Kong ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
Cycling Stability ◽  
Supercapacitor Electrode ◽  
Capacity Retention ◽  
Excellent Cycling Stability ◽  
Superior Electrochemical Properties ◽  
Hexagonal Nanoplates

Regular Mn3O4 hexagonal nanoplates are synthesized for a supercapacitor electrode. This electrode exhibits excellent cycling stability with 100% capacity retention after 5000 cycles.

Influences of trace graphite on the morphology and capacitance of CoOOH/Co(OH)2 nanocomposites

2020 ◽  
Vol 13 (03) ◽  
pp. 2050018 ◽  
Author(s):  
Shuxia Liu ◽  
Xiaoqi Tan ◽  
Huaiping Zhang ◽  
Yaodong Zhang ◽  
Baobi Li ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
Electrode Material ◽  
Cycling Stability ◽  
Microwave Method ◽  
Graphite Content ◽  
One Step ◽  
Excellent Cycling Stability ◽  
Graphite Nanocomposites

In this study, CoOOH/Co(OH)2 and CoOOH/Co(OH)2/graphite nanocomposites were obtained using a one-step microwave method. The morphologies of nanocomposites changed intensively by adding trace graphite, thereby affecting the electrochemical properties. The optimum capacitance of the electrode material can reach 402[Formula: see text]F[Formula: see text]g[Formula: see text] at 2[Formula: see text]A[Formula: see text]g[Formula: see text] and could be increased by 172% (692[Formula: see text]F[Formula: see text]g[Formula: see text] until 2200 cycles when the graphite content is 10[Formula: see text]mg. An excellent cycling stability of 86.2% capacitance retention of the highest value was attained after 10,000 cycles, which is higher than those of the CoOOH/Co(OH)2 electrode. The proposed provides a simple means to improve the electrochemical properties by changing the morphology of electrode material in supercapacitors.

Needle-like CoO nanowires grown on carbon cloth for enhanced electrochemical properties in supercapacitors

RSC Advances ◽  
2015 ◽  
Vol 5 (52) ◽  
pp. 41627-41630 ◽  
Author(s):  
D. L. Ji ◽  
J. H. Li ◽  
L. M. Chen ◽  
D. Zhang ◽  
T. Liu ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
Hydrothermal Method ◽  
Annealing Process ◽  
Cycling Stability ◽  
Carbon Cloth ◽  
Excellent Cycling Stability

Needle-like CoO nanowires grown on carbon cloth have been successfully fabricated by a controllable hydrothermal method followed by an annealing process. The as-fabricated nanostructure showed enhanced specific capacitances and excellent cycling stability in supercapacitors.

Improving the electrochemical properties of the red P anode in Na-ion batteries via the space confinement of carbon nanopores

2015 ◽  
Vol 3 (48) ◽  
pp. 24221-24225 ◽  
Author(s):  
Na Wu ◽  
Hu-Rong Yao ◽  
Ya-Xia Yin ◽  
Yu-Guo Guo
Keyword(s):  
Electrochemical Properties ◽  
Porous Carbon ◽  
Cycling Stability ◽  
Hierarchical Porous Carbon ◽  
Capacity Retention ◽  
Hierarchical Porous

By encapsulating red P into a special hierarchical porous carbon (HPC) substrate with 2 nm pores, the P@HPC composite no longer involves huge pulverization during sodiation/desodiation but is provided with improved cycling stability (the capacity retention > 88% after 200 cycles).

Enhanced supercapacitor performance of a 3D architecture tailored using atomically thin rGO–MoS2 2D sheets

RSC Advances ◽  
2016 ◽  
Vol 6 (96) ◽  
pp. 93384-93393 ◽  
Author(s):  
Sujin P. Jose ◽  
Chandra Sekhar Tiwary ◽  
Suppanat Kosolwattana ◽  
Prasanth Raghavan ◽  
Leonardo D. Machado ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
Md Simulations ◽  
Supercapacitor Electrode ◽  
Conductive Additive ◽  
3D Architecture ◽  
Supercapacitor Performance ◽  
Superior Electrochemical Properties

A stable, conductive, additive-free and scalable 3D architecture supercapacitor electrode fabricated by atomically thin 2D sheets of GO and MoS2 shows superior electrochemical properties which are further substantiated using MD simulations.

A self-supported, flexible, binder-free pseudo-supercapacitor electrode material with high capacitance and cycling stability from hollow, capsular polypyrrole fibers

2015 ◽  
Vol 3 (31) ◽  
pp. 16162-16167 ◽  
Author(s):  
Zhenyu Li ◽  
Jie Cai ◽  
Pavel Cizek ◽  
Haitao Niu ◽  
Yong Du ◽  
...  
Keyword(s):  
Electrode Material ◽  
Cycling Stability ◽  
Supercapacitor Electrode ◽  
High Capacitance ◽  
Binder Free ◽  
Excellent Cycling Stability

A hollow capsular polypyrrole nanofiber has shown great potential for preparing pseudo-supercapacitor electrodes with high capacitance and excellent cycling stability.

Nanocubes composed of FeS2@C nanoparticles as advanced anode materials for K-ion storage

2020 ◽  
Vol 7 (2) ◽  
pp. 394-401 ◽  
Author(s):  
Yushan Luo ◽  
Mengli Tao ◽  
Jianhua Deng ◽  
Renming Zhan ◽  
Bingshu Guo ◽  
...  
Keyword(s):  
Anode Materials ◽  
Specific Capacity ◽  
Rate Capability ◽  
Cycling Stability ◽  
Core Shell ◽  
Capacity Retention ◽  
Storage Performance ◽  
Ion Storage ◽  
Excellent Cycling Stability ◽  
Unique Core

The unique core–shell structural FeS2@C nanocubes display outstanding K-storage performance with impressive specific capacity, excellent cycling stability and superior rate capability with 73% capacity retention at 2 A g−1.

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