ZIF-derived hierarchical pore carbons as high-performance catalyst for methane decomposition

2021 ◽  
Author(s):  
Shun Zhao ◽  
Yun Zhang ◽  
Yunfei Wu ◽  
Lijun Zhang ◽  
Haoquan Hu ◽  
...  
Keyword(s):  
High Performance ◽  
Methane Decomposition ◽  
Hierarchical Pore

scholarly journals Hierarchical porous MnO/graphene composite aerogel as high-performance anode material for lithium ion batteries

RSC Advances ◽  
2017 ◽  
Vol 7 (26) ◽  
pp. 15857-15863 ◽  
Author(s):  
Zhiying Ma ◽  
Hailiang Cao ◽  
Xufeng Zhou ◽  
Wei Deng ◽  
Zhaoping Liu
Keyword(s):  
Anode Material ◽  
High Performance ◽  
High Capacity ◽  
Rate Capability ◽  
Lithium Ion ◽  
Composite Aerogel ◽  
Graphene Composite ◽  
Hierarchical Pore Structure ◽  
Hierarchical Porous ◽  
Hierarchical Pore

MnO/graphene composite anode material with hierarchical pore structure shows high capacity, excellent rate capability and stability.

scholarly journals Konjac Sponge Derived Carbon Flakes with Optimized Pore Structure for High-Performance Supercapacitor

2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Bing Han ◽  
Chongchong Geng ◽  
Gong Cheng
Keyword(s):  
Pore Structure ◽  
High Performance ◽  
Activated Carbons ◽  
Koh Activation ◽  
Acid Electrolyte ◽  
Activation Temperature ◽  
Hierarchical Pore Structure ◽  
Lateral Distance ◽  
N Doping ◽  
Hierarchical Pore

Lamellar activated carbons derived from Konjac sponges (KACs) have been successfully fabricated through a facile KOH activation method. By manipulating the activation temperature and KOH/C ratio, the achieved KACs exhibit ultrahigh specific surface area up to ∼3000 m2/g and hierarchical pore structure with tunable micro/mesopore distribution. Notably, KACs possess plenty of worm-shaped micropores formed by graphene stacking layers with the lateral distance close to size of hydrated electrolyte ions. Owing to optimized pore structure, high graphitization, and extra O/N doping, KACs exhibited much enhanced specific capacitance (253.0 F/g), superior rate ability (77% retention of capacitance at 10 A/g), and remarkable cycling stability (0.4% decay under 5 A/g after 2000 cycles) in the acid electrolyte. The mass production ability of KAC materials and the knowledge of correlation between texture properties and capacitive performance open new opportunities for the application of such novel biomass-derived carbons in supercapacitor devices.

Fluorine-Doped Graphene/Nanosized Carbide-Derived Carbon Composites for High-Performance Supercapacitor

NANO ◽  
2019 ◽  
Vol 14 (08) ◽  
pp. 1950099 ◽  
Author(s):  
Pengtao Yan ◽  
Lei Yan ◽  
Sumei Zhao ◽  
Zhen Zuo ◽  
Xiaoxu Wang ◽  
...  
Keyword(s):  
Specific Capacitance ◽  
Double Layer ◽  
Electric Double Layer ◽  
High Performance ◽  
High Specific Surface Area ◽  
Double Layer Capacitance ◽  
Doped Graphene ◽  
Hierarchical Pore ◽  
Carbide Derived Carbon ◽  
Electric Double Layer Capacitance

A graphene-based composite with high electrochemical performance for supercapacitor applications is fabricated by introducing nanoscale carbide-derived carbon (NCDC) into the fluorine-doped graphene (FG). The incorporation of fluorine can increase the specific capacitance of graphene by providing more pseudocapacitance, whereas the introduction of NCDC into the FG/NCDC composite offers high specific surface area (SSA) (up to 1317[Formula: see text]m2[Formula: see text]g[Formula: see text]) and hierarchical pore structure, resulting in an enhanced electric double layer capacitance. Due to the synergistic effect of pseudocapacitance and electric double layer capacitance, the specific capacitance of FG/NCDC composite can reach 321 F g[Formula: see text] at a scan rate of 5[Formula: see text]mV[Formula: see text]s[Formula: see text] in aqueous electrolyte. Notably, the specific capacitance of the FG/NCDC composite is very stable during long-term cyclic tests, with no significant degradation after 10,000 cycles. Due to its excellent supercapacitive performance, the FG/NCDC composite can be considered as a promising electrode material for high-performance supercapacitors.

Freeze-drying assisted synthesis of hierarchical porous carbons for high-performance supercapacitors

2015 ◽  
Vol 3 (42) ◽  
pp. 21016-21022 ◽  
Author(s):  
Yue Li ◽  
Qinglei Liu ◽  
Danmiao Kang ◽  
Jiajun Gu ◽  
Wang Zhang ◽  
...  
Keyword(s):  
Self Assembly ◽  
High Performance ◽  
Freeze Drying ◽  
Carbon Electrodes ◽  
Porous Carbons ◽  
Pore Structures ◽  
Hierarchical Porous ◽  
Hierarchical Porous Carbons ◽  
Novel Method ◽  
Hierarchical Pore

A novel method combining freezing-drying and self-assembly was developed to prepare carbon electrodes with optimized hierarchical pore structures.

scholarly journals A lithium–sulfur full cell with ultralong cycle life: influence of cathode structure and polysulfide additive

2015 ◽  
Vol 3 (7) ◽  
pp. 3808-3820 ◽  
Author(s):  
Sören Thieme ◽  
Jan Brückner ◽  
Andreas Meier ◽  
Ingolf Bauer ◽  
Katharina Gruber ◽  
...  
Keyword(s):  
High Performance ◽  
High Surface ◽  
High Surface Area ◽  
Full Cell ◽  
Hierarchical Pore Structure ◽  
Cathode Structure ◽  
Large Pore Volume ◽  
Hierarchical Pore ◽  
Carbide Derived Carbon ◽  
Lithium Sulfur

A carbide-derived carbon with hierarchical pore structure, large pore volume and high surface area was applied as a rigid, conductive scaffold for sulfur conversion. Full cell tests revealed high performance and reversible cycling over 4100 cycles.

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