Facile synthesis of interconnected carbon network decorated with Co3O4 nanoparticles for potential supercapacitor applications

Zhao, Yirong; Liu, Ying; Du, Jingwei; Zhang, Xudong; Zhou, Jinyuan; Li, Xiaopeng; Wu, Caixia; Zhu, Ziran; Xie, Erqing; Pan, Xiaojun

doi:10.1016/j.apsusc.2019.05.142

Cited by 62 publications

(13 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Our device delivers a maximum energy density of 47.18 W h kg –1 at a power density of 375 W kg –1 and maintained an energy density of 34.22 W h·kg –1 at a high power density of 7.5 kW·kg –1 . These values are comparable with or even higher than those of state-of-the-art ASCs. ,,,− The excellent electrochemical performance of our device should be attributed to the increased potential window and advantage of the cathode composed of Co 3 O 4 @PNC composites with high capacitance and long cycle life.…”

Section: Resultssupporting

confidence: 60%

Ultrasmall Co₃O₄ Nanoparticles Confined in P, N-Doped Carbon Matrices for High-Performance Supercapacitors

Yang

Zhou

et al. 2020

J. Phys. Chem. C

View full text Add to dashboard Cite

Co3O4 nanoparticles with smaller particle size can expose more active sites to react with electrolytes, thereby exhibiting better supercapacitive performance. However, the size of Co3O4 nanoparticles is difficult to be effectively controlled in traditional carbon matrices. Herein, P, N-codoped carbon matrices with ultrahigh surface area and abundant nanocavities are used as a novel host to confine the growth of Co3O4 nanoparticles. The Co3O4/carbon composites with high redox activities of Co3O4 are successfully obtained, in which Co3O4 nanoparticles are strongly anchored in the carbon matrices, resulting in the enhancement of the composites’ capacitive performance (1310 F g–1 at 0.5 A g–1). Meanwhile, the strong anchoring effect of the carbon host on Co3O4 nanoparticles because of the rich doping elements and the confinement effect of the nanocavities ensure long-term stability (92% capacitance retention after 5000 cycles). Furthermore, the assembled asymmetric supercapacitor using this composite as the cathode material and activated carbon as the anode material delivers a high energy density of 47.18 W h kg–1 at 375 W kg–1.

show abstract

Section: Resultssupporting

confidence: 60%

Ultrasmall Co₃O₄ Nanoparticles Confined in P, N-Doped Carbon Matrices for High-Performance Supercapacitors

Yang

Zhou

et al. 2020

J. Phys. Chem. C

View full text Add to dashboard Cite

show abstract

“…In general, the presence of two types of pores can lead to an increase of the capacitance of the materials. [ 22,58] The peak identified on the graph by "hydroxide, defects, and C=O" do not give S3, Supporting Information, which varies from 4.70 to 2.96 at. %.…”

Section: Physico-chemical Characterizationmentioning

confidence: 99%

“…The survey spectra of C/ Co3O4-600, C/Co3O4-700, and C/Co3O4-800 reveal the existence of the three elements, Co, C, and O, in the materials (FigureS4, Supporting Information). The high resolution deconvoluted C 1s peak (Figure6a) illustrates the existence of a main contribution at 284.44 eV corresponding to C sp 2 and several small 284.94, 286.27, 287.45, and 288.64 eV assigned to oxygen-based functional groups, i.e., C−C=O, C−OR, C=O, and COOR, respectively [58]. The shape of the peak C 1s is broader for C/Co3O4-600, and it gets narrower for the high temperature-treated materials.…”

mentioning

confidence: 99%

Co₃O₄ Nanoparticles Embedded in Mesoporous Carbon for Supercapacitor Applications

Zallouz

Réty

Vidal

et al. 2021

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

Metal oxides are of great interest for supercapacitor application, however, they suffer from capacity fading during cycling and limited cycle life. In this work, a one-pot bottom-up approach is proposed to design cobalt oxide (Co3O4) nanoparticles confined in a mesoporous carbon. This involved the coassembly of a phenolic resin, a surfactant, and a cobalt salt followed by a high temperature pyrolysis (600−800 °C) and a subsequent low temperature oxidation (190−240 °C) step. Very small Co3O4 particle size (2.3−7.4 nm) could be achieved for high loadings of Co3O4 (up to 59%) in the carbon network. Both the pyrolysis and oxidation temperature increase led to an increase of nanoparticle size, porosity and electronic conductivity. At low temperatures, i.e., 600 and 650 °C, and despite the low particle size, the performances are poor and limited by the carbon low electronic conductivity. At high temperature (800 °C), the conductivity is improved translating in a higher capacitance, but the larger and more aggregated nanoparticles induced low rate capability. The best compromise to maintain high capacitance and rate capability was observed at 700 and 750 °C and thus for composite materials combining simultaneously dispersed nanoparticles, high porosity, and good electronic conductivity. In particular, the material treated at 750 °C presents, in a 2 electrode system using 2 M KOH, a capacitance of 54 F g −1 at 0.1 A g −1 , a very high rate capability of 48.7% at 10 A g −1 , and a superior rate performance of 82% after 10000 cycles.

show abstract

“…Through calculation, the specific capacitance of the NPC/CMNT/Ni x Co y O z composites reaches 993 F g −1 at the current density of 1 A g −1 , which is higher than 563 F/g of the NPC/Ni x Co y O z . As shown in Table 1, it is also higher than that of other C/metal oxides (sulfides) composites [39–43] …”

Section: Resultsmentioning

confidence: 84%

Synthesis of N‐Doped Porous Carbon/Carbon Micro‐Nanotubes/Ni_xCo_yO_z Nanosheets as a High‐Capacity Electrode Material for Supercapacitors

Cong

Yang²,

et al. 2021

ChemistrySelect

View full text Add to dashboard Cite

The N‐doped porous carbon (NPC) /carbon micro‐nanotubes (CMNT) /NixCoyOz nanosheets with rich mesopores and 1.37 wt% nitrogen doping are successfully synthesized by a pyrolysis‐ionization‐precipitation combination process, using coal‐based polyaniline and nickelocene as original materials. Therein, most of the CMNT are upright CMTs and worm‐like curved CNTs, and a few are bamboo‐like tubes or carbon nanofibers. Moreover, many flower‐like aggregates assembled by spinel NiCo2O4 nanosheets are anchored on the surface of the NPC and CMNT. The NPC/CMNT/NixCoyOz exhibits a high specific capacitance and cycling stability, attributed to the large BET specific surface area (485 m2/g), suitable BET average pore size (2.3 nm), good hydrophilicity and wettability, and synergistic effects among three components. The assembled NPC/CMNT/NixCoyOz//AC asymmetric supercapacitor also demonstres a high specific capacitance of 120 F g−1 at a current density of 1 A g−1 and a high energy density of 16.7 Wh kg−1 at a power density of 500 W kg−1.

show abstract

Facile synthesis of interconnected carbon network decorated with Co3O4 nanoparticles for potential supercapacitor applications

Cited by 62 publications

References 58 publications

Ultrasmall Co₃O₄ Nanoparticles Confined in P, N-Doped Carbon Matrices for High-Performance Supercapacitors

Ultrasmall Co₃O₄ Nanoparticles Confined in P, N-Doped Carbon Matrices for High-Performance Supercapacitors

Co₃O₄ Nanoparticles Embedded in Mesoporous Carbon for Supercapacitor Applications

Synthesis of N‐Doped Porous Carbon/Carbon Micro‐Nanotubes/Ni_xCo_yO_z Nanosheets as a High‐Capacity Electrode Material for Supercapacitors

Contact Info

Product

Resources

About

Facile synthesis of interconnected carbon network decorated with Co3O4 nanoparticles for potential supercapacitor applications

Cited by 62 publications

References 58 publications

Ultrasmall Co3O4 Nanoparticles Confined in P, N-Doped Carbon Matrices for High-Performance Supercapacitors

Ultrasmall Co3O4 Nanoparticles Confined in P, N-Doped Carbon Matrices for High-Performance Supercapacitors

Co3O4 Nanoparticles Embedded in Mesoporous Carbon for Supercapacitor Applications

Synthesis of N‐Doped Porous Carbon/Carbon Micro‐Nanotubes/NixCoyOz Nanosheets as a High‐Capacity Electrode Material for Supercapacitors

Contact Info

Product

Resources

About

Ultrasmall Co₃O₄ Nanoparticles Confined in P, N-Doped Carbon Matrices for High-Performance Supercapacitors

Ultrasmall Co₃O₄ Nanoparticles Confined in P, N-Doped Carbon Matrices for High-Performance Supercapacitors

Co₃O₄ Nanoparticles Embedded in Mesoporous Carbon for Supercapacitor Applications

Synthesis of N‐Doped Porous Carbon/Carbon Micro‐Nanotubes/Ni_xCo_yO_z Nanosheets as a High‐Capacity Electrode Material for Supercapacitors