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.

Soft-template assisted synthesis of Fe/N-doped hollow carbon nanospheres as advanced electrocatalysts for the oxygen reduction reaction in microbial fuel cells

2017 ◽  
Vol 5 (36) ◽  
pp. 19343-19350 ◽  
Author(s):  
Lihua Zhou ◽  
Chunli Yang ◽  
Jing Wen ◽  
Peng Fu ◽  
Yaping Zhang ◽  
...  
Keyword(s):  
Microbial Fuel Cells ◽  
Reduction Reaction ◽  
Soft Template ◽  
Hollow Nanospheres ◽  
Carbon Nanospheres ◽  
Pyrolysis Method ◽  
Hollow Carbon ◽  
Template Assisted Synthesis ◽  
Co Doped ◽  
Poly Aniline

Fe and N-co-doped hollow carbon nanospheres have been fabricated via a simple pyrolysis method using poly(aniline-co-pyrrole) copolymer hollow nanospheres as precursors. The resulting catalyst displayed potential application as a cathode in a MFC.

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.

Hollow Carbon Nanospheres with Superior Rate Capability for Sodium-Based Batteries

2012 ◽  
Vol 2 (7) ◽  
pp. 873-877 ◽  
Author(s):  
Kun Tang ◽  
Lijun Fu ◽  
Robin J. White ◽  
Linghui Yu ◽  
Maria-Magdalena Titirici ◽  
...  
Keyword(s):  
Rate Capability ◽  
Carbon Nanospheres ◽  
Hollow Carbon

Hollow Carbon Nanospheres with a High Rate Capability for Lithium-Based Batteries

ChemSusChem ◽  
2012 ◽  
Vol 5 (2) ◽  
pp. 400-403 ◽  
Author(s):  
Kun Tang ◽  
Robin J. White ◽  
Xiaoke Mu ◽  
Maria-Magdalena Titirici ◽  
Peter A. van Aken ◽  
...  
Keyword(s):  
Rate Capability ◽  
High Rate ◽  
Carbon Nanospheres ◽  
High Rate Capability ◽  
Hollow Carbon

scholarly journals Self-Template Synthesis of Nitrogen-Doped Hollow Carbon Nanospheres with Rational Mesoporosity for Efficient Supercapacitors

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3619
Author(s):  
Xiang Zhao ◽  
Mu Zhang ◽  
Wei Pan ◽  
Rui Yang ◽  
Xudong Sun
Keyword(s):  
Rational Design ◽  
Electrode Materials ◽  
Rate Capability ◽  
High Specific Capacitance ◽  
Hierarchical Architecture ◽  
Formaldehyde Resin ◽  
Carbon Nanospheres ◽  
Nitrogen Doped ◽  
Symmetric Supercapacitor ◽  
Hollow Carbon

Rational design and economic fabrication are essential to develop carbonic electrode materials with optimized porosity for high-performance supercapacitors. Herein, nitrogen-doped hollow carbon nanospheres (NHCSs) derived from resorcinol and formaldehyde resin are successfully prepared via a self-template strategy. The porosity and heteroatoms in the carbon shell can be adjusted by purposefully introducing various dosages of ammonium ferric citrate (AFC). Under the optimum AFC dosage (30 mg), the as-prepared NHCS-30 possesses hierarchical architecture, high specific surface area up to 1987 m2·g−1, an ultrahigh mesopore proportion of 98%, and moderate contents of heteroatoms, and these features endow it with a high specific capacitance of 206.5 F·g−1 at 0.2 A·g−1, with a good rate capability of 125 F·g−1 at 20 A·g−1 as well as outstanding electrochemical stability after 5000 cycles in a 6 M KOH electrolyte. Furthermore, the assembled NHCS-30 based symmetric supercapacitor delivers an energy density of 14.1 W·h·kg−1 at a power density of 200 W·kg−1 in a 6 M KOH electrolyte. This work provides not only an appealing model to study the effect of structural and component change on capacitance, but also general guidance to expand functionality electrode materials by the self-template method.

Facile synthesis of core–shell nanostructured hollow carbon nanospheres@nickel cobalt double hydroxides as high-performance electrode materials for supercapacitors

2017 ◽  
Vol 46 (10) ◽  
pp. 3276-3283 ◽  
Author(s):  
Juan Xu ◽  
Chaojie Ma ◽  
Jianyu Cao ◽  
Zhidong Chen
Keyword(s):  
High Performance ◽  
Electrode Materials ◽  
Rate Capability ◽  
High Specific Capacitance ◽  
Core Shell ◽  
Carbon Nanospheres ◽  
Facile Hydrothermal Method ◽  
Nickel Cobalt ◽  
Hollow Carbon ◽  
Double Hydroxides

Novel core–shell nanostructured hollow carbon nanospheres@nickel cobalt double hydroxides (HCNs@NiCo-LDH) were fabricated by a facile hydrothermal method, exhibiting a high specific capacitance (2558 F g−1 at 1 A g−1) and outstanding rate capability.

Nitrogen-Doped Hollow Carbon Nanospheres Derived from Dopamine as High-Performance Anode Materials for Sodium-Ion Batteries

NANO ◽  
2016 ◽  
Vol 11 (11) ◽  
pp. 1650124 ◽  
Author(s):  
Yurong Yang ◽  
Min Qiu ◽  
Li Liu ◽  
Dan Su ◽  
Yanmei Pi ◽  
...  
Keyword(s):  
High Performance ◽  
Rate Capability ◽  
Topological Defects ◽  
Outer Wall ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
Carbon Nanospheres ◽  
Nitrogen Doped ◽  
N Doping ◽  
Hollow Carbon

Designed as an anode material for sodium ion batteries, porous nitrogen-doped hollow carbon nanospheres (N-HCS, [Formula: see text][Formula: see text]nm) are successfully synthesized via the mature template-assisted method using silica and dopamine as template and carbon precursor, respectively. For detailed characterization of Raman, FTIR and XPS results, it is revealed that N-doping can form a disordered carbon structure and induce a large number of topological defects on carbon outer wall. The N-HCS electrode exhibits excellent cycling stability and rate capability, delivering a satisfying capacity of 306[Formula: see text]mAh g[Formula: see text] over 600 cycles at a discharging rate of 0.05[Formula: see text]A g[Formula: see text] and an attainable capacity of 188[Formula: see text]mAh g[Formula: see text] even at a high discharging rate of 3.0[Formula: see text]A g[Formula: see text]. The excellent electrochemical performance of N-HCS can be attributed to the high content of pores. Moreover, the high content of pyridinic and graphitic N could facilitate the transfer of sodium ion and electron.

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