Hierarchical porous nitrogen-doped carbon microspheres after thermal rearrangement as high performance electrode materials for supercapacitors

Liang, Ying; Lu, Yunhua; Xiao, Guoyong; Zhang, Jianhua; Chi, Haijun; Yan, Dong

doi:10.1016/j.apsusc.2020.147141

Cited by 51 publications

(19 citation statements)

References 51 publications

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“…Biomass can easily be converted to activated carbon through heat treatment in a certain gaseous environment (Ar/N2/CO2/H2O), chemical impregnation (KOH, NaOH, ZnCl2, H3PO4), or a combination of both [11,12]. The main constituent components include lignocellulose consisting of hemicellulose, cellulose, and lignin, which allow the production of activated carbon with tubular [13], rod-like [14], strobili-fiber [15], microsphere [16], nanotube [17], and nanosheet [18] morphologies. Meanwhile, chemical impregnation with high-temperature pyrolysis in a certain gas environment can optimize the fibrils and cellulose in the biowaste components to produce high-density nanofibers [19].…”

Section: Introductionmentioning

confidence: 99%

Nanofiber-enrich activated carbon coin derived from tofu dregs as electrode materials for supercapacitor

Taer

Apriwandi

Hasanah

et al. 2021

CST

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In this study, the activated carbon with enriched nanofiber obtained from free-binder materials. It was conducted tofu dregs carbon nanofiber as electrode material for supercapacitor without the addition of pVdF/PTFE. The chemical impregnation of NaOH, ZnCl2 and H3PO4 at high-temperature pyrolysis in an N2-CO2 environment converted the tofu dregs into carbon coin. Subsequently, the physical properties including, microcrystalline, morphology, element analysis, and electrochemical properties of specific capacitance were investigated. The morphological structure of activated carbon showed high nanofiber density and was decorated by sponge-like pores. In addition, the nanofiber contains oxygen content of 12.70% which can act as self-doping due to the pseudo-capacitance properties. Furthermore, the two-electrode system obtained a specific capacitance of 163 F g-1 in 1 M H2SO4 electrolyte. The results showed that tofu dregs-based activated carbon coins are sustainable and efficient to obtain high-dense nanofiber structure as electrode materials for energy storage applications.

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Section: Introductionmentioning

confidence: 99%

Nanofiber-enrich activated carbon coin derived from tofu dregs as electrode materials for supercapacitor

Taer

Apriwandi

Hasanah

et al. 2021

CST

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“…It is found that there are two broad characteristic peaks at ≈2 θ = 24° and 2 θ = 44°, corresponding to the typical (002) plane and (101) plane of carbon materials, respectively. [ 46 ] According to the Bragg equation, the average d spacings of carbon microparticles were mainly around at 0.371 and 0.206 nm. It can be observed that the two peaks of carbon microparticles are obviously affected by PAA concentration and final pyrolysis temperature.…”

Section: Resultsmentioning

confidence: 99%

“…Compared with our reported carbon microspheres derived from 6FAP and PMDA, the carbon microparticles based on DADHBP and BTDA exhibit higher BET areas and more pores of 1.7 and 2.7 nm. [ 46 ] The decrease in substituents and proper increase inflexibility tend to form closer packing because of less steric hindrance and better movement ability of polymer segment. Therefore, the PAA content, thermally rearranged time and pyrolysis temperature should be reasonably optimized to obtain sufficient contact area, which conduces to promote the transport of electrons and ions.…”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, the N and O contents measured by EA as well as capacitances of HPI‐90‐2‐700, HPI‐90‐2‐800, and HPI‐90‐2‐900 were compared with several previously reported carbon materials ( Table 2 ). [ 46,52–54 ] For HPI‐90‐2‐900, the N and O contents determined by XPS are also shown in Table 2. The three carbon microparticles prepared in this work exhibit similar BET area, but the capacitance performance of HPI‐90‐2‐900 is most considerable, which may be attributed to high micropore area and rich oxygen and nitrogen contents (10.96% and 4.84%).…”

Section: Resultsmentioning

confidence: 99%

“…Calculated from the GCD curves, the specific capacitance reaches 172 F g −1 when the current density is 0.5 A g −1 , which is higher than the reported HPI(6FAP‐PMDA) of 100.4 F g −1 . [ 46 ] Moreover, the energy density and power density are shown in Figure 9d. The energy density of HPI‐90‐2‐900 reaches 2.78 Wh kg −1 when the power density is 10 008 W kg −1 .…”

Section: Resultsmentioning

confidence: 99%

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Rich Oxygen‐Containing Carbon Microparticles Derived from Self‐Assembled Polyimides for High‐Performance Supercapacitors

Liang

Zhang

et al. 2021

Energy Tech

Self Cite

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Novel porous carbon microparticles derived from self‐assembled polyimides (PIs) were prepared via a facile solvothermal strategy, followed by thermally rearranged treatment and pyrolysis process. Without additional activation, the carbon microparticles exhibited large specific surface areas and abundant oxygen and nitrogen contents. Herein, the PIs microparticles derived from 3,3′,4,4′‐benzophenonetetracarboxylic dianhydride and 3,3′‐diamino‐4,4′‐dihydroxybiphenyl, are self‐assembled by nanoscale layers. Due to thermally rearranged process, the as‐prepared carbon microparticles contain a large number of micropores and mesopores, resulting in large specific surface area of 1070.7 m2 g−1. Due to the rich oxygen of 10.96%, HPI‐90‐2‐900 offers higher specific capacitance of 263.7 F g−1 when the current density is 0.5 A g−1. In addition, the specific capacitances are maintained by 67.5% when the current density is enhanced to 10 A g−1. The long‐term stability test shows that the retention rate of specific capacitance is close to 100% after 10 000 cycles of charge and discharge when the current density was 1 A g−1, indicating a good cycle life. Moreover, a light‐emitting diode is successfully lighted up by the coin cells. Therefore, a facile strategy to improve the electrochemical performance of carbon microparticles to meet the requirements of energy storage and conversion is provided.

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Ultrahigh Capacitive Supercapacitor Derived from Self‐Oxygen Doped Biomass‐Based 3D Porous Carbon Sources

2021

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This study reported an ultrahigh specific capacitance of a supercapacitor, using self‐oxygen doped 3D‐porous carbon derivatives from dried banana leaves. The samples were synthesized by ZnCl2 impregnation at different temperature pyrolysis of 700–900 °C. Furthermore, the overall process significantly increased the specific surface area from 429.6 to 860.4 m2 g−1 followed by the formation of 3D‐interconnected pores structures. Unexpectedly, the activated carbon demonstrated high‐level oxygen dopants between 9.47–12.45%. These valuable physical features showed a ultrahigh specific capacitance of 401 F g−1 and 235 F g−1 in a two‐electrode configuration system, using electrolytes of 1 M H2SO4 and 6 M KOH, respectively. Also, electrochemical properties were evaluated in the form of pellet binder‐free materials. Porous carbon sources were known to generate extensive specific energy of 55.69 Wh kg−1 and specific power of 200.09 W kg−1. Based on the technique and results, the use of hierarchical 3D‐porous carbon derivatives is validated as robust electrode materials in developing high‐performance electrochemical energy storage.

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Hierarchical porous nitrogen-doped carbon microspheres after thermal rearrangement as high performance electrode materials for supercapacitors

Cited by 51 publications

References 51 publications

Nanofiber-enrich activated carbon coin derived from tofu dregs as electrode materials for supercapacitor

Nanofiber-enrich activated carbon coin derived from tofu dregs as electrode materials for supercapacitor

Rich Oxygen‐Containing Carbon Microparticles Derived from Self‐Assembled Polyimides for High‐Performance Supercapacitors

Ultrahigh Capacitive Supercapacitor Derived from Self‐Oxygen Doped Biomass‐Based 3D Porous Carbon Sources

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