scholarly journals MnO2@Corncob Carbon Composite Electrode and All-Solid-State Supercapacitor with Improved Electrochemical Performance

Materials ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 2379 ◽  
Author(s):  
Xin-Sheng Li ◽  
Man-Man Xu ◽  
Yang Yang ◽  
Quan-Bo Huang ◽  
Xiao-Ying Wang ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Solid State ◽  
Electrochemical Performance ◽  
Electrode Materials ◽  
Carbon Composite ◽  
Maximum Energy ◽  
Waste Biomass ◽  
Excellent Electrochemical Performance ◽  
Anodic Electrodeposition ◽  
Long Lifetime

Two corncob-derived carbon electrode materials mainly composed of micropores (activated carbon, AC) and mesopores/macropores (corncob carbon, CC) were prepared and studied after the anodic electrodeposition of MnO2. The capacity of the MnO2/activated carbon composite (MnO2@AC) electrode did not noticeably increase after MnO2 electrodeposition, while that of the MnO2/corncob carbon composite (MnO2@CC) electrode increased up to 9 times reaching 4475 mF cm−2. An asymmetric all-solid-state supercapacitor (ASC) was fabricated using AC as the anode, MnO2@CC as the cathode, and polyvinyl alcohol (PVA)/LiCl gel as the electrolyte. An ultrahigh specific capacitance of 3455.6 mF cm−2 at 1 mA cm−2, a maximum energy density of 1.56 mW h cm−2, and a long lifetime of 10,000 cycles can be achieved. This work provides insights in understanding the function of MnO2 in biomass-derived electrode materials, and a green path to prepare an ASC from waste biomass with excellent electrochemical performance.

scholarly journals Hierarchical NiS/N-doped carbon composite hollow spheres with excellent supercapacitor performance

2017 ◽  
Vol 5 (40) ◽  
pp. 21257-21265 ◽  
Author(s):  
Tao Liu ◽  
Chuanjia Jiang ◽  
Bei Cheng ◽  
Wei You ◽  
Jiaguo Yu
Keyword(s):  
Electrochemical Performance ◽  
Electrode Materials ◽  
Hollow Spheres ◽  
Carbon Composite ◽  
Carbon Spheres ◽  
Excellent Electrochemical Performance ◽  
Supercapacitor Performance ◽  
Hollow Carbon ◽  
Hollow Carbon Spheres

The synthesized NiS nanosheets anchored on N-doped hollow carbon spheres (NHCSs) exhibit excellent electrochemical performance as electrode materials for supercapacitors.

Flower-like bimetal Ni/Co based metal-organic-framework materials with adjustable components toward high performance solid-state supercapacitors

2021 ◽  
Author(s):  
fuyong Ren ◽  
Yajun Ji ◽  
Fei Chen ◽  
Yiyi Qian ◽  
Jingjing Tian ◽  
...  
Keyword(s):  
Solid State ◽  
Energy Density ◽  
Electrochemical Performance ◽  
High Performance ◽  
Electrode Materials ◽  
Metal Organic Framework ◽  
Framework Materials ◽  
Excellent Electrochemical Performance ◽  
Metal Organic ◽  
Organic Framework

The design and fabrication of electrode materials with excellent electrochemical performance are the key measures to improve the energy density of device. Since cobalt based materials have excellent conductivity and...

Designed synthesis of nickel–cobalt-based electrode materials for high-performance solid-state hybrid supercapacitors

Nanoscale ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 1921-1938 ◽  
Author(s):  
Liu Yang ◽  
Xintong Lu ◽  
Shihao Wang ◽  
Jiansen Wang ◽  
Xiaohui Guan ◽  
...  
Keyword(s):  
Solid State ◽  
Electrochemical Performance ◽  
High Performance ◽  
Electrode Materials ◽  
Hybrid Supercapacitors ◽  
Nickel Cobalt ◽  
Excellent Electrochemical Performance ◽  
Designed Synthesis

Schematic descriptions for the formation of CoNi2S4, NiCo-LDH, and NiO/Co3O4 and the excellent electrochemical performance of CoNi2S4.

Synthesis of high performance N-doped carbon coated Li2ZnTi3O8via a NTA-assisted solid-state route

2018 ◽  
Vol 47 (8) ◽  
pp. 2711-2718 ◽  
Author(s):  
Zhaohui Meng ◽  
Song Wang ◽  
Lijuan Wang ◽  
Hongjiang Hou
Keyword(s):  
Solid State ◽  
Electrochemical Performance ◽  
High Performance ◽  
Chelating Agent ◽  
N Sources ◽  
Solid State Route ◽  
Excellent Electrochemical Performance ◽  
Carbon Coated ◽  
C And N

LZTO@C–N with an excellent electrochemical performance has been synthesized using NTA as C and N sources, as well as a chelating agent.

A multi-level structure bio-carbon composite with polyaniline for high performance supercapacitors

RSC Advances ◽  
2015 ◽  
Vol 5 (16) ◽  
pp. 12230-12236 ◽  
Author(s):  
Guofu Ma ◽  
Haiping Wang ◽  
Kanjun Sun ◽  
Hui Peng ◽  
Yajuan Wu ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
High Performance ◽  
Electrode Materials ◽  
Synergistic Effects ◽  
Level Structure ◽  
Carbon Composite ◽  
Multi Level

The electrochemical performance of electrode materials can be enhanced by the synergistic effects of polyaniline and multi-level structured bio-carbon.

Facile synthesis of nickel–cobalt sulfide/reduced graphene oxide hybrid with enhanced capacitive performance

RSC Advances ◽  
2015 ◽  
Vol 5 (72) ◽  
pp. 58777-58783 ◽  
Author(s):  
Xiaoqing Cai ◽  
Xiaoping Shen ◽  
Lianbo Ma ◽  
Zhenyuan Ji ◽  
Lirong kong
Keyword(s):  
Graphene Oxide ◽  
Electrochemical Performance ◽  
Reduced Graphene Oxide ◽  
Electrode Materials ◽  
Cobalt Sulfide ◽  
Facile Synthesis ◽  
One Pot ◽  
Nickel Cobalt ◽  
Excellent Electrochemical Performance ◽  
Reduced Graphene

A facile one-pot refluxing method was developed to prepare nickel–cobalt sulfide/reduced graphene oxide (RGO) hybrids. The as-synthesized NiCo2S4/RGO hybrids as electrode materials for supercapacitors exhibit excellent electrochemical performance.

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