scholarly journals Fabrication of monodisperse nitrogen-doped carbon double-shell hollow nanoparticles for supercapacitors

RSC Advances ◽  
2017 ◽  
Vol 7 (33) ◽  
pp. 20694-20699 ◽  
Author(s):  
Juyoung Yun ◽  
Jaemoon Jun ◽  
Jungsup Lee ◽  
Jaehoon Ryu ◽  
Kisu Lee ◽  
...  
Keyword(s):  
Current Density ◽  
Electrode Material ◽  
Nitrogen Doping ◽  
High Surface ◽  
High Surface Area ◽  
High Specific Capacitance ◽  
Hollow Nanoparticles ◽  
Nitrogen Doped ◽  
Nitrogen Doped Carbon ◽  
A Current

A supercapacitor based on nitrogen-doped carbon double shell hollow nanoparticles as the electrode material exhibited a high specific capacitance of 202 F g−1at a current density of 0.5 A g−1due to high surface area and nitrogen-doping.

Efficient Preparation of Spongy-Like Porous-Activated Carbon from Waste Millfeed Towards High Performance Supercapacitors

NANO ◽  
2020 ◽  
Vol 15 (08) ◽  
pp. 2050106
Author(s):  
Rong-Rong Han ◽  
Hao-Yan Zhu ◽  
Min-Peng Li ◽  
Wen-Tong Yang ◽  
Chun Lu ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Activated Carbon ◽  
Specific Capacitance ◽  
Surface Area ◽  
Current Density ◽  
High Surface ◽  
High Surface Area ◽  
High Specific Capacitance ◽  
A Current ◽  
Porous Activated Carbon

Biomass-based activated porous carbon (PC) with large porosity and high surface area has been considered as potential electrode material for supercapacitors. The spongy-like porous-activated carbon (SPAC) was prepared from millfeed by one-step carbonization/activation with KOH treatment. It shows three-dimensional (3D) spongy-like structure and high specific surface area (1535[Formula: see text]m2[Formula: see text]g[Formula: see text]). The SPAC electrode exhibits a high specific capacitance (237.9[Formula: see text]F[Formula: see text]g[Formula: see text] at a current density of 0.5[Formula: see text]A[Formula: see text]g[Formula: see text]) and a superior cycle stability (the capacitance retention of 95% after 10[Formula: see text]000 cycles at 2[Formula: see text]A[Formula: see text]g[Formula: see text]) in 2[Formula: see text]M KOH electrolyte, while the SPAC reveals a high specific capacitance of 157[Formula: see text]F[Formula: see text]g[Formula: see text] at 0.5[Formula: see text]A[Formula: see text]g[Formula: see text], good electrochemical stability with 93% capacitance retention after 5000 cycles in ionic liquids. Furthermore, the specific capacitance of SPAC//SPAC supercapacitor reaches 82.1[Formula: see text]F[Formula: see text]g[Formula: see text] at a current density of 0.5[Formula: see text]A[Formula: see text]g[Formula: see text] and achieves a high capacitance retention of 75% when the charging current increases to 10[Formula: see text]A[Formula: see text]g[Formula: see text] in 2[Formula: see text]M KOH electrolyte. The SPAC//SPAC supercapacitor possesses a high specific capacitance of 29.6[Formula: see text]F[Formula: see text]g[Formula: see text] at 0.5[Formula: see text]A[Formula: see text]g[Formula: see text] and a preeminent energy density of 27.8[Formula: see text]Wh[Formula: see text]kg[Formula: see text] (at a power density of 640[Formula: see text]W[Formula: see text]kg[Formula: see text]) in ionic liquids. This paper provides a convenient approach to synthesize low-cost biomass-based carbon material for supercapacitor applications.

scholarly journals Nitrogen doped hierarchical activated carbons derived from polyacrylonitrile fibers for CO2 adsorption and supercapacitor electrodes

RSC Advances ◽  
2018 ◽  
Vol 8 (52) ◽  
pp. 29767-29774 ◽  
Author(s):  
L. Zheng ◽  
W. B. Li ◽  
J. L. Chen
Keyword(s):  
Specific Capacitance ◽  
Surface Area ◽  
Current Density ◽  
Co2 Adsorption ◽  
Activated Carbons ◽  
High Surface ◽  
High Surface Area ◽  
Nitrogen Doped ◽  
A Current

Nitrogen doped activated carbons with high surface area up to 3797 m2 g−1 exhibit specific capacitance of 231 F g−1 at a current density of 10 A g−1.

Cellulose generated-microporous carbon nanosheets with nitrogen doping

RSC Advances ◽  
2014 ◽  
Vol 4 (18) ◽  
pp. 9126-9132 ◽  
Author(s):  
Wenzhong Shen ◽  
Tuoping Hu ◽  
Weibin Fan
Keyword(s):  
Surface Area ◽  
Porous Carbon ◽  
Pore Volume ◽  
Nitrogen Doping ◽  
High Surface ◽  
High Surface Area ◽  
Structural Features ◽  
Carbon Nanosheets ◽  
Nitrogen Doped ◽  
Adsorption Performance

Nanosheet porous carbon with high surface area and pore volume, unique compositional and structural features endow the nitrogen-doped porous carbon nanosheets with superior CO2 adsorption performance.

Facile synthesis of high-surface-area activated carbon from coal for supercapacitors and high CO2 sorption

RSC Advances ◽  
2016 ◽  
Vol 6 (48) ◽  
pp. 42019-42028 ◽  
Author(s):  
Zhu Peng ◽  
Zhanglong Guo ◽  
Wei Chu ◽  
Min Wei
Keyword(s):  
Activated Carbon ◽  
Current Density ◽  
High Surface ◽  
High Surface Area ◽  
High Specific Capacitance ◽  
Cyclic Stability ◽  
Facile Synthesis ◽  
High Co2 ◽  
Co2 Sorption ◽  
Scan Rate

AC4T800t2 displayed the high specific capacitance (384 F g−1) at the scan rate of 5 mV s−1 and good cyclic stability (95% retention after 5000 cycles) at the current density of 5 A g−1. It also showed high CO2 uptake of 169.44 mL g−1 at 1 MPa.

Direct Synthesis of Nitrogen-Doped Carbon Nanosheets with High Surface Area and Excellent Oxygen Reduction Performance

Langmuir ◽  
2014 ◽  
Vol 30 (27) ◽  
pp. 8238-8245 ◽  
Author(s):  
Qiao Liu ◽  
Youxin Duan ◽  
Qiuping Zhao ◽  
Fuping Pan ◽  
Bin Zhang ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Surface Area ◽  
Direct Synthesis ◽  
High Surface ◽  
High Surface Area ◽  
Carbon Nanosheets ◽  
Nitrogen Doped ◽  
Nitrogen Doped Carbon

Optimized synthesis of nitrogen-doped carbon with extremely high surface area for adsorption and supercapacitor

2021 ◽  
Vol 538 ◽  
pp. 147961
Author(s):  
Baogen Liu ◽  
Rui Shi ◽  
Ruofei Chen ◽  
Chunhao Wang ◽  
Ke Zhou ◽  
...  
Keyword(s):  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Nitrogen Doped ◽  
Nitrogen Doped Carbon

scholarly journals In-Situ Synthesis of Flexible Nanocellulose/Carbon Nanotube/Polypyrrole Hydrogels for High-Performance Solid-State Supercapacitors

2021 ◽  
Author(s):  
Yang Zhan ◽  
Yang Hu ◽  
Yu Chen ◽  
Quanling Yang ◽  
Zhuqun Shi ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Solid State ◽  
Current Density ◽  
Electrode Materials ◽  
High Surface ◽  
High Surface Area ◽  
In Situ Synthesis ◽  
Composite Hydrogels ◽  
A Current

Abstract Nanocellulose has become one of the most attractive matrix materials for flexible supercapacitors, owing to the high surface area, good mechanical properties and environmental friendliness. Herein, we developed electrode materials with high capacitance and mechanical flexibility through the in-situ synthesis of polypyrrole (PPy) in TEMPO-oxidized cellulose nanofibril (TOCN)/sulfonated carbon nanotubes (SCNT) composite hydrogels. The TOCN/SCNT/PPy composite hydrogels were thus obtained via a bifunctional Fe3+ in-situ oxidation, showing high specific capacitance of 5299 mF/cm2 at a current density of 1 mA/cm2. Furthermore, the assembled symmetric TOCN-40SCNT-PPy solid-state supercapacitor exhibited outstanding capacitance of 375 mF/cm2 and electrochemical stability with 163.2% capacitance retention at a current density of 1 mA/cm2 for 2500 cycles. These nanocellulose/carbon nanotube/polypyrrole hydrogels are thus promising in the fields of flexible solid-state supercapacitor with superior electrochemical performance.

scholarly journals Comparative Electrocatalytic Oxygen Evolution Reaction Studies of Spinel NiFe2O4 and Its Nanocarbon Hybrids

2021 ◽  
Author(s):  
Pratik V. Shinde ◽  
Rutuparna Samal ◽  
Chandra Sekhar Rout
Keyword(s):  
Graphene Oxide ◽  
Oxygen Evolution ◽  
Current Density ◽  
Transition Metal Oxides ◽  
Oxygen Evolution Reaction ◽  
Active Sites ◽  
High Performance ◽  
High Surface ◽  
High Surface Area ◽  
A Current

AbstractElectrocatalytic oxygen evolution reaction (OER) is one of the crucial reactions for converting renewable electricity into chemical fuel in the form of hydrogen. To date, there is still a challenge in designing ideal cost-effective OER catalysts with excellent activity and robust durability. The hybridization of transition metal oxides and carbonaceous materials is one of the most effective and promising strategies to develop high-performance electrocatalysts. Herein, this work synthesized hybrids of NiFe2O4 spinel materials with two-dimensional (2D) graphene oxide and one-dimensional (1D) carbon nanotubes using a facile solvothermal approach. Electrocatalytic activities of NiFe2O4 with 2D graphene oxide toward OER were realized to be superior even to the 1D carbon nanotube-based electrocatalyst in terms of overpotential to reach a current density of 10 mA/cm2 as well as Tafel slopes. The NiFe2O4 with 2D graphene oxide hybrid exhibits good stability with an overpotential of 327 mV at a current density of 10 mA/cm2 and a Tafel slope of 103 mV/dec. The high performance of NiFe2O4 with 2D graphene oxide is mainly attributed to its unique morphology, more exposed active sites, and a porous structure with a high surface area. Thus, an approach of hybridizing a metal oxide with a carbonaceous material offers an attractive platform for developing an efficient electrocatalyst for water electrochemistry applications.

scholarly journals Nitrogen-doped carbon-encapsulated SnO2–SnS/graphene sheets with improved anodic performance in lithium ion batteries

2015 ◽  
Vol 3 (47) ◽  
pp. 24148-24154 ◽  
Author(s):  
Jieqiong Shan ◽  
Yuxin Liu ◽  
Ping Liu ◽  
Yanshan Huang ◽  
Yuezeng Su ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Current Density ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Graphene Sheets ◽  
Core Shell ◽  
High Specific Capacity ◽  
Nitrogen Doped ◽  
Nitrogen Doped Carbon ◽  
A Current

A dual-doping approach for N–C@SnO2–SnS/GN with 2D core–shell architecture has been developed. Used as the anode material in LIBs, it delivers a high specific capacity of 1236 mA h g−1 at a current density of 0.1 A g−1 after 110 cycles.

Sign in / Sign up

Export Citation Format

Share Document