Enhanced electrochemical activity of perforated graphene in nickel-oxide-based supercapacitors and fabrication of potential asymmetric supercapacitors

2017 ◽  
Vol 1 (3) ◽  
pp. 529-539 ◽  
Author(s):  
Qi Xun Xia ◽  
Je Moon Yun ◽  
Rajaram S. Mane ◽  
Lei Li ◽  
Jianjian Fu ◽  
...  
Keyword(s):  
Nickel Oxide ◽  
Electrode Material ◽  
Nickel Foam ◽  
Porous Electrode ◽  
Specific Capacity ◽  
Three Dimensional ◽  
Asymmetric Supercapacitors ◽  
Facile Hydrothermal Method ◽  
High Specific Capacity ◽  
Nio Nanosheets

We synthesize a hierarchically porous electrode material with a high specific capacity composed of nickel oxide (NiO) nanosheets and perforated graphene (PG) sheets grown on a three-dimensional (3D) macroporous nickel foam via a facile hydrothermal method.

Flower-like polyaniline–NiO structures: a high specific capacity supercapacitor electrode material with remarkable cycling stability

RSC Advances ◽  
2016 ◽  
Vol 6 (50) ◽  
pp. 43959-43963 ◽  
Author(s):  
Bangning Sun ◽  
Xinping He ◽  
Xijin Leng ◽  
Yang Jiang ◽  
Yudong Zhao ◽  
...  
Keyword(s):  
Electrode Material ◽  
Nickel Foam ◽  
Specific Capacity ◽  
Cycling Stability ◽  
Supercapacitor Electrode ◽  
High Specific Capacity ◽  
Binder Free

In this study, we report a binder-free in situ approach to synthesize a polyaniline–NiO composite on a nickel foam as a supercapacitor electrode.

General synthesis of three-dimensional alkali metal vanadate aerogels with superior lithium storage properties

2016 ◽  
Vol 4 (37) ◽  
pp. 14408-14415 ◽  
Author(s):  
Guozhao Fang ◽  
Jiang Zhou ◽  
Caiwu Liang ◽  
Yangsheng Cai ◽  
Anqiang Pan ◽  
...  
Keyword(s):  
Alkali Metal ◽  
Specific Capacity ◽  
Three Dimensional ◽  
Rate Capability ◽  
Lithium Storage ◽  
High Specific Capacity ◽  
General Synthesis ◽  
Storage Properties ◽  
Good Rate Capability ◽  
General Method

We demonstrate a general method for the preparation of a series of 3D alkali metal vanadate aerogels, including NaV3O8, NaV6O15, and K0.25V2O5. The resulting aerogels exhibit excellent Li+ storage properties in terms of high specific capacity, good rate capability, and outstanding cyclic stability as cathodes for LIBs.

WS2–3D graphene nano-architecture networks for high performance anode materials of lithium ion batteries

RSC Advances ◽  
2016 ◽  
Vol 6 (109) ◽  
pp. 107768-107775 ◽  
Author(s):  
Yew Von Lim ◽  
Zhi Xiang Huang ◽  
Ye Wang ◽  
Fei Hu Du ◽  
Jun Zhang ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Materials ◽  
High Performance ◽  
Specific Capacity ◽  
Three Dimensional ◽  
Rate Capability ◽  
Lithium Ion ◽  
High Specific Capacity ◽  
3D Graphene ◽  
Simple Growth

Tungsten disulfide nanoflakes grown on plasma activated three dimensional graphene networks. The work features a simple growth of TMDs-based LIBs anode materials that has excellent rate capability, high specific capacity and long cycling stability.

Flower-like C@V2O5 microspheres as highly electrochemically active cathode in aqueous zinc-ion batteries

2020 ◽  
Vol 10 (10) ◽  
pp. 1697-1703
Author(s):  
Zebin Wu ◽  
Wei Zhou ◽  
Zhen Liu ◽  
Yijie Zhou ◽  
Guilin Zeng ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
Retention Rate ◽  
Specific Capacity ◽  
Cycling Performance ◽  
Zinc Ion ◽  
Rate Performance ◽  
Capacity Retention ◽  
Facile Hydrothermal Method ◽  
High Specific Capacity ◽  
Electrochemically Active

Flower-like C@V2O5 microspheres with high specific capacity were synthesized by a facile hydrothermal method. The microstructure, specific capacity and electrochemical properties of C@V2O5 microspheres were studied. Results showed that the C@V2O5 microspheres with a diameter of ∼3 m are covered over by V2O5 nanosheets, and therefore have a large surface area which is almost 5 times higher than that of pure V2O5 powders. Moreover, the initial specific capacity of C@V2O5 microsphere is as high as 247.42 mAh · g–1, and after 100 cycles, the capacity retention rate is still 99.4%. Compared with pure V2O5, flower-like C@V2O5 microspheres show higher discharge specific capacity, better rate performance and more stable cycling performance.

Synthesis of novel bimetallic nickel cobalt telluride nanotubes on nickel foam for high-performance hybrid supercapacitors

2020 ◽  
Vol 7 (2) ◽  
pp. 477-486 ◽  
Author(s):  
Shiyi Zhang ◽  
Dongzhi Yang ◽  
Ming Zhang ◽  
Yaxin Liu ◽  
Ting Xu ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Solvothermal Synthesis ◽  
High Performance ◽  
Nickel Foam ◽  
Specific Capacity ◽  
Hybrid Supercapacitor ◽  
High Specific Capacity ◽  
Hybrid Supercapacitors ◽  
Ion Exchange Reaction ◽  
Nickel Cobalt

Novel bimetallic nickel cobalt telluride nanotubes are grown on nickel foam by solvothermal synthesis and ion-exchange reaction for constructing self-standing hybrid supercapacitor electrodes with high specific capacity and electrical conductivity.

scholarly journals Urchin-like NiCoP coated with a carbon layer as a high-performance electrode for all-solid-state asymmetric supercapacitors

2020 ◽  
Vol 1 (3) ◽  
pp. 481-494 ◽  
Author(s):  
Jingzhou Ling ◽  
Hanbo Zou ◽  
Wei Yang ◽  
Shengzhou Chen
Keyword(s):  
Solid State ◽  
High Performance ◽  
Specific Capacity ◽  
Physical Structure ◽  
Carbon Layer ◽  
Cycling Stability ◽  
High Conductivity ◽  
Asymmetric Supercapacitors ◽  
High Specific Capacity ◽  
Excellent Cycling Stability

The NiCoP@C-ULAs composite with high conductivity, abundant pores and good physical structure shows high specific capacity and excellent cycling stability.

scholarly journals Synthesis of ZnO/Polypyrrole Nanoring Composite as High-Performance Anode Materials for Lithium Ion Batteries

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Haipeng Li ◽  
Shuang Yang ◽  
Yan Zhao ◽  
Taizhe Tan ◽  
Xin Wang ◽  
...  
Keyword(s):  
Electrode Material ◽  
Electronic Conductivity ◽  
Specific Capacity ◽  
Three Dimensional ◽  
Lithium Ion ◽  
Industrial Applications ◽  
Solution Chemistry ◽  
Raw Material ◽  
Ammonium Bromide ◽  
One Pot

ZnO has attracted considerable attention as electrode material in lithium-ion battery (LIB) due to its theoretically high capacity. However, poor electronic conductivity and huge volumetric changes during cycling limit its industrial applications. In this work, polypyrrole nanorings (PNRs) were successfully prepared via the solution chemistry method using pyrrole (Py) as raw material, ammonium persulfate (APS) as oxidant, and cetyltrimethyl ammonium bromide (CTAB) as surfactant. The ZnO/PNR composite was synthesized with zinc oxide nanoparticles absorbed on the surface of PPy nanorings through the one-pot in situ sol-gel method. The composite shows a three-dimensional intertwined network structure where the size of polypyrrole nanorings ranges from 80 nm to 100 nm in diameter and the average size of uniformly distributed ZnO nanocrystals is 10.49 nm. The unique three-dimensional conductive framework can provide good electronic contact between the ZnO particles and buffer the volume variation during the lithiation/delithiation processes. As an electrode material for LIBs, the ZnO/PNR composite delivers a first cycle discharge capacity of 1658 mAh g-1 and a capacity retention of 50.7% over 150 cycles at 200 mA g-1, indicating high specific capacity and outstanding cycle stability.

Preparation of Microporous Supercapacitor Electrode Based on the Triple Networks of Disposable Sheet Mask

NANO ◽  
2019 ◽  
Vol 14 (12) ◽  
pp. 1950157
Author(s):  
Shasha Jiao ◽  
Tiehu Li ◽  
Chuanyin Xiong ◽  
Chen Tang ◽  
Alei Dang ◽  
...  
Keyword(s):  
Specific Capacity ◽  
Three Dimensional ◽  
Cost Savings ◽  
High Specific Capacitance ◽  
Electrochemical Performances ◽  
Energy Storage Devices ◽  
Supercapacitor Electrode ◽  
High Specific Capacity ◽  
Storage Devices ◽  
New Ideas

In this study, a three-dimensional hybrid was synthesized via depositing of carbon nanotubes (CNTs) and ferroferric oxide (Fe3O4) particles on the abandoned disposable sheet mask fabric, followed by the polymerization of polypyrrole (PPY). The as-prepared nanocomposite shows superior electrochemical performances when it was used for the material for the flexible supercapacitor electrode. Benefiting from the synergistic effect of CNTs, Fe3O4 and PPY in such a porous structure, cyclic voltammetry and galvanostatic charge/discharge measurements indicated that the as-prepared hybrid possessed a good reversibility and high specific capacity at various scanning rates. It turned out that the as-prepared electrode demonstrated a high specific capacitance of 221.7[Formula: see text]F/g at the scanning rate of 50[Formula: see text]mV/s and long-life cycling stability of 88.2% after 10[Formula: see text]000 cycles. Besides, the electrode composite had good flexibility after repeated bending times of 3000. With the exception of improved electrochemical properties, this hybrid electrode material also showed many advantages, including facile preparation, flexibility and cost savings. These results will provide new ideas and solutions to design and fabricate the flexible supercapacitors, which has great prospect in the development of energy storage devices.

Three-dimensional flower-like nickel oxide supported on graphene sheets as electrode material for supercapacitors

2012 ◽  
Vol 63 (1) ◽  
pp. 146-152 ◽  
Author(s):  
Chongyong Ge ◽  
Zhaohui Hou ◽  
Binhong He ◽  
Fanyan Zeng ◽  
Jianguo Cao ◽  
...  
Keyword(s):  
Nickel Oxide ◽  
Electrode Material ◽  
Three Dimensional ◽  
Graphene Sheets
Sign in / Sign up

Export Citation Format

Share Document