Hierarchical porous biomass activated carbon for hybrid battery capacitors derived from persimmon branches

2020 ◽  
Vol 10 (4) ◽  
pp. 523-530 ◽  
Author(s):  
Jiaxin Peng ◽  
Juan Yu ◽  
Bicheng Meng ◽  
Lejie Wang ◽  
Xingliang Zhang ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Carbon Materials ◽  
Rate Capability ◽  
Mesoporous Structure ◽  
Koh Activation ◽  
Biomass Carbon ◽  
Cycle Stability ◽  
Capacity Reservation ◽  
Hierarchical Porous ◽  
Graphite Structure

Activated carbon materials are used in hybrid battery capacitors. They reduce energy density of devices, and can greatly improve the cycle life and power density. Herein, we used fast-growing persimmon branches in Shaanxi as a biomass carbon source. The persimmon branch activated carbon (PB-AC850) material was found to exhibit abundant graded pore structure similar to graphite structure after KOH activation. The macro/mesoporous structure in PB-AC850 facilitated the ions (solvated PF-6 ) transport, resulting in much better rate capability as compared to commercial activated carbon. It was moreover found from preparation of the hybrid battery capacitor that the addition of activated carbon reduced resistance and polarization of the device. LFP+PB-AC850 exhibited excellent cycle stability with high to 93.4% capacity reservation after 500 cycles at 5C.

Cellulose Nanofibers Derived Carbon Aerogel with 3D Multiscale Pore Architecture for High-Performance Supercapacitors

Nanoscale ◽  
2021 ◽  
Author(s):  
Lumin Chen ◽  
Hou-Yong Yu ◽  
Ziheng Li ◽  
Xiang Chen ◽  
Wenlong Zhou
Keyword(s):  
High Performance ◽  
Electrode Materials ◽  
Carbon Materials ◽  
Cellulose Nanofibers ◽  
Rate Capability ◽  
Carbon Aerogel ◽  
Large Specific Surface Area ◽  
Hierarchical Porous Structure ◽  
Pore Architecture ◽  
Hierarchical Porous

Carbon materials are highly promising electrode materials for supercapacitors, due to their hierarchical porous structure and large specific surface area. However, the limited specific capacitance and inferior rate capability significantly...

scholarly journals Structural Flexibility in Activated Carbon Materials Prepared under Harsh Activation Conditions

Materials ◽  
2019 ◽  
Vol 12 (12) ◽  
pp. 1988 ◽  
Author(s):  
Fabiano Gomes Ferreira de Paula ◽  
Ignacio Campello-Gómez ◽  
Paulo Fernando Ribeiro Ortega ◽  
Francisco Rodríguez-Reinoso ◽  
Manuel Martínez-Escandell ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Surface Area ◽  
Structural Changes ◽  
Organic Molecules ◽  
Carbon Materials ◽  
High Surface ◽  
High Surface Area ◽  
Koh Activation ◽  
3D Network ◽  
Activation Conditions

Although traditionally high-surface area carbon materials have been considered as rigid structures with a disordered three dimensional (3D) network of graphite microdomains associated with a limited electrical conductivity (highly depending on the porous structure and surface chemistry), here we show for the first time that this is not the case for activated carbon materials prepared using harsh activation conditions (e.g., KOH activation). In these specific samples a clear structural re-orientation can be observed upon adsorption of different organic molecules, the structural changes giving rise to important changes in the electrical resistivity of the material. Whereas short chain hydrocarbons and their derivatives give rise to an increased resistivity, the contrary occurs for longer-chain hydrocarbons and/or alcohols. The high sensitivity of these high-surface area carbon materials towards these organic molecules opens the gate towards their application for sensing devices.

Boosting rate capability of ionic liquid supercapacitors by copolymer-derived activated hollow carbon nanospheres

2020 ◽  
Vol 10 (11) ◽  
pp. 1925-1931
Author(s):  
Hongquan Gao ◽  
Guijiang Xu ◽  
Dong Zhang ◽  
Haitao Zhou ◽  
Jianchun Wu ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Activated Carbon ◽  
Hollow Structure ◽  
Rate Capability ◽  
Koh Activation ◽  
Hollow Nanospheres ◽  
Carbon Nanospheres ◽  
Potential Value ◽  
Hollow Carbon ◽  
Poly Aniline

Herein, a novel activated hollow carbon nanospheres (AHCNSs) with enlarged specific surface area (SSA) of 1796 m2 ú g-1 and pore volume (Vp) of 1.33 cm3 ú g-1 was synthesized from poly(aniline-co-pyrrole) hollow nanospheres via KOH activation method. The supercapacitor containing AHCNSs displayed high gravimetric capacitance (Cg) of 290 F ú g-1 at 1 Aú g-1 and 79% capacitance retention even at 20 Aú g-1 in ionic liquid EMIMBF4, indicating its excellent rate capability. This study highlights the potential value of novel hollow structure activated carbon in the field of energy storage.

scholarly journals Hierarchical Porous Carbon Derived from Sichuan Pepper for High-Performance Symmetric Supercapacitor with Decent Rate Capability and Cycling Stability

Nanomaterials ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 553 ◽  
Author(s):  
Hengshuo Zhang ◽  
Wei Xiao ◽  
Wenjie Zhou ◽  
Shanyong Chen ◽  
Yanhua Zhang
Keyword(s):  
Specific Capacitance ◽  
Current Density ◽  
High Performance ◽  
High Current Density ◽  
Rate Capability ◽  
Cycling Stability ◽  
Koh Activation ◽  
High Current ◽  
Symmetric Supercapacitor ◽  
Hierarchical Porous

Hierarchical micro-mesoporous carbon (denoted as HPC-2 in this study) was synthesized by pre-carbonization of biomass Sichuan pepper followed by KOH activation. It possessed well-developed porosity with the specific surface area of 1823.1 m2 g−1 and pore volume of 0.906 cm3 g−1, and exhibited impressive supercapacitive behaviors. For example, the largest specific capacitance of HPC-2 was tested to be ca. 171 F g−1 in a three-electrode setup with outstanding rate capability and stable electrochemical property, whose capacitance retention was near 100% after cycling at rather a high current density of 40 A g−1 for up to 10,000 cycles. Furthermore, a two-electrode symmetric supercapacitor cell of HPC-2//HPC-2 was constructed, which delivered the maximum specific capacitance and energy density of ca. 30 F g−1 and 4.2 Wh kg−1, respectively, had prominent rate performance and cycling stability with negligible capacitance decay after repetitive charge/discharge at a high current density of 10 A g−1 for over 10,000 cycles. Such electrochemical properties of HPC-2 in both three- and two-electrode systems are superior or comparable to those of a great number of porous biomass carbon reported previously, hence making it a promising candidate for the development of high-performance energy storage devices.

Hierarchical porous microspheres of activated carbon with a high surface area from spores for electrochemical double-layer capacitors

2016 ◽  
Vol 4 (41) ◽  
pp. 15968-15979 ◽  
Author(s):  
Yiyi Jin ◽  
Kuan Tian ◽  
Lu Wei ◽  
Xingyan Zhang ◽  
Xin Guo
Keyword(s):  
Activated Carbon ◽  
Surface Area ◽  
Double Layer ◽  
Carbon Materials ◽  
High Surface ◽  
High Surface Area ◽  
Electrochemical Double Layer Capacitors ◽  
Hierarchical Porous ◽  
Electrochemical Double Layer ◽  
Double Layer Capacitors

3D activated carbon materials almost perfectly inherit the nano-architectures of spores, exhibiting excellent capacitance storage capability for EDLCs.

scholarly journals Preparation of Hierarchical Porous Carbon Aerogels by Microwave Assisted Sol-Gel Process for Supercapacitors

Polymers ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 429 ◽  
Author(s):  
Xueqing Cai ◽  
Guiming Tan ◽  
Zhentao Deng ◽  
Jianhong Liu ◽  
Dayong Gui
Keyword(s):  
Low Cost ◽  
Sol Gel ◽  
Rate Capability ◽  
Single Mode ◽  
Nitrogen Adsorption ◽  
High Specific Surface Area ◽  
Carbon Aerogels ◽  
Koh Activation ◽  
Activation Process ◽  
Hierarchical Porous

Low-cost resorcinol formaldehyde (RF) organic aerogels were prepared by using resorcinol and formaldehyde as precursors, and sodium hydroxide as a catalyst through a single-mode microwave radiation-assisted sol-gel method and ambient temperature drying. Because of the ring focusing and power-max technology, the fabrication procedure of carbon aerogels (CAs) are much easier, faster, and cheaper than traditional methods. The RF aerogels were then pyrolysized at 900 °C, and the KOH activation process was used to further dredge micropores in the carbon aerogels. The CAs were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), nitrogen adsorption/desorption, and a series of electrochemical tests. The KOH activated carbon aerogels with 3D-nano-network structure exhibited a high specific surface area of 2230 m2 g−1 with appropriate pore volumes of micro-, meso-, and macropores. The specific capacitance of CAs activated by KOH measured in a two-electrode cell was 170 F g−1 at 0.5 A g−1 with excellent rate capability and cycle stability in 6 M KOH electrolyte.

Homogeneous sulphur-doped composites: porous carbon materials with unique hierarchical porous nanostructure for super-capacitor application

RSC Advances ◽  
2016 ◽  
Vol 6 (88) ◽  
pp. 84847-84853 ◽  
Author(s):  
Jie Zhang ◽  
Zhanxu Yang ◽  
Xiaorong Wang ◽  
Tieqiang Ren ◽  
Qingdong Qiao
Keyword(s):  
Layered Double Hydroxide ◽  
Porous Carbon ◽  
Carbon Materials ◽  
Koh Activation ◽  
Two Dimensional ◽  
Super Capacitor ◽  
Porous Carbon Materials ◽  
Hierarchical Porous ◽  
Porous Nanostructure ◽  
Double Hydroxide

Homogeneous sulphur-doped porous carbon materials with a unique hierarchical porous nanostructure have been prepared by the combination of the two-dimensional interlayer confinement effect of a layered double hydroxide (LDH) and KOH activation method.

Hierarchical porous nitrogen doping activated carbon with high performance for supercapacitor electrodes

RSC Advances ◽  
2016 ◽  
Vol 6 (19) ◽  
pp. 15320-15326 ◽  
Author(s):  
Juan Zeng ◽  
Qi Cao ◽  
Bo Jing ◽  
Xiuxiang Peng
Keyword(s):  
Activated Carbon ◽  
Carbon Nanofibers ◽  
High Performance ◽  
Nitrogen Doping ◽  
Carbon Materials ◽  
Chemical Activation ◽  
Hierarchical Porous ◽  
Composite Carbon ◽  
Subsequent Chemical

Hierarchical porous nitrogen doping activated carbon materials were designed and prepared by carbonization of electrospun composite carbon nanofibers and subsequent chemical activation.

Sign in / Sign up

Export Citation Format

Share Document