Simple synthesis of core-shell structure of Co–Co3O4 @ carbon-nanotube-incorporated nitrogen-doped carbon for high-performance supercapacitor

Zou, Yongjin; Cai, Chenglong; Xiang, Cuili; Huang, Pengru; Chu, Hailiang; She, Zhe; Xu, Fen; Sun, Lin; Kraatz, Heinz‐Bernhard

doi:10.1016/j.electacta.2017.12.184

Cited by 179 publications

(76 citation statements)

References 54 publications

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“…Meanwhile, modification by loading metal oxide and doping heteroatom was widely studied to improve electrochemical performance. Zhang et al 29 prepared Co─Co 3 O 4 supported on carbon-nanotubeincorporated nitrogen-doped carbon. It showed excellent electrochemical performance and cycle stability.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen‐doping activated biomass carbon from tea seed shell for CO ₂ capture and supercapacitor

2019

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Activated carbon is a promising material that has a broad application prospect.In this work, biomass (tea seed shell) was used to prepare activated carbon with KOH activation (referred to as AC), and nitrogen was doped in activated carbon using melamine as the nitrogen source (referred to as NAC-x, where x is the mass ratio of melamine and activated carbon). The obtained activated biomass carbon (activated bio-carbon) samples were characterized by Brunauer-Emmett-Teller (BET)-specific surface area analysis, ultimate analysis, X-ray photoelectron spectroscopy (XPS) analysis, Raman spectrum analysis, and X-ray diffraction (XRD) patterns. The specific surface areas of activated bio-carbons were 1503.20 m 2 /g (AC), 1064.54 m 2 /g (NAC-1), 1187.93 m 2 /g (NAC-2), 1055.32 m 2 /g (NAC-3), and 706.22 m 2 /g (NAC-4), revealing that nitrogen-doping process leads to decrease in specific surface area. XPS analysis revealed that the main nitrogen-containing functional groups were pyrrolic-N and pyridinic-N. The capacity of CO 2 capture and electrochemical performance of activated bio-carbon samples were investigated. The CO 2 capturing capacity followed this order: AC (3.15 mmol/g) > NAC-2 (2.75 mmol/g) > NAC-1 (2.69 mmol/g) > NAC-3 (2.44 mmol/g) > NAC-4 (1.95 mmol/g) at 298 K at 1 bar, which is consistent with the order of specific surface area. The specific surface area played a dominant role in CO 2 capturing capacity. As for supercapacitor, AC-4 showed the highest specific capacitance (168 F/g) at the current density of 0.5 A/g, but NAC-2 showed the best electrochemical performance (89 F/g) at 2 A/g. Nitrogen-containing functional groups and specific surface area both had an important impact on electrochemical performance. In general, NAC-3 and NAC-2 produced excellent electrochemical performance. Compared with NAC-3, less melamine was used to prepare NAC-2; therefore, NAC-2 was considered as the best activated bio-carbon for supercapacitor for 141 F/g (at 0.5 A/g), 108 F/g (at 1 A/g), and 89 F/g (at 2 A/g) in this work.

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Section: Introductionmentioning

confidence: 99%

Nitrogen‐doping activated biomass carbon from tea seed shell for CO ₂ capture and supercapacitor

2019

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“…A higher I D /I G value represents a lower graphitization degree of carbon in the sample. [31] The value of I D /I G for MnO/C and PÀ C was 0.85 and 0.89, respectively, suggesting the MnO/C possesses more ordered graphitized carbon.…”

Section: Resultsmentioning

confidence: 93%

Using Peanut Shells to Construct a Porous MnO/C Composite Material with Highly Improved Lithium Storage Performance

Zhan

Wen

et al. 2020

ChemElectroChem

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Rational utilization of biomass waste in creating new clean energy such as lithium‐ion batteries is conducive to alleviating the energy crisis and boosting environmental protection. Herein, using peanut shells as the carbon source, a MnO/C composite material was successfully prepared through an eco‐environmental and facile approach based on hydrothermal treatment and pyrolysis. The resultant MnO/C composite material demonstrated a hierarchical porous structure and MnO particles with irregular morphology were embedded in the pores. When used in a lithium‐ion battery, the material exhibited much better lithium storage properties than those for pristine MnO and peanut shell‐derived carbon. In 0.0–3.0 V, the composite material can supply an initial specific capacity of 1169.5 mA h g−1, with a capacity retention ratio of 84.9 % after 200 electrochemical cycles. Even at 2400 mA g−1, the material can still offer a discharge capacity of 532.3 mA h g−1, manifesting an outstanding rate performance. The enhanced lithium storage properties of the composite material are attributed to the support of the porous carbon matrix derived from peanut shells, which are not only conducive to improving conductivity but also capable of buffering the volume expansion/shrinkage caused by lithiation/delithiation during charge/discharge processes.

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“…In addition, the HRTEM image in Figure (c) shows crystal lattice fringes with an interplanar distance of 0.24 nm for the (311) crystal planes of Co 3 O 4 and 0.188 nm for (103) crystal planes of Cu 2 S (JCPDS Card no. 026‐1116), respectively . The STEM‐EDS mapping in Figure (d–h) shows that the contrast variation was due to the presence of different elements.…”

Section: Resultsmentioning

confidence: 99%

Designing a Copper‐ and Silver‐Sulfide Composite with Co₃O₄ for High‐Performance Electrochemical Supercapacitors

2018

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Electronic devices have driven modern lifestyle demands for efficient and environmentally friendly energy storage appliances. This paper reports the simple design of an efficient, cost‐effective pseudocapacitor electrode based on copper sulfide (Cu2S) and silver sulfide (Ag2S) composites with cobalt oxide (Co3O4) for high‐performance energy storage devices. A simple one‐pot approach was used to synthesize hexagonal sheets of Co3O4 and a successive ionic layer adsorption and reaction method was exploited to coat these sheets with nanostructures of Cu2S and Ag2S. The resulting three‐dimensional (3D) Co3O4/Cu2S and Co3O4/Ag2S composite electrode contained a high loading of Cu2S and Ag2S nanoparticles (metal sulfides) on the hexagonal sheets of Co3O4 (metal oxide), which offers a highly conductive network assisting in rapid charge‐transfer reactions and reduces the internal resistance of the electrode. A symmetrical supercapacitor based on Co3O4/Cu2S//Co3O4/Cu2S showed a high areal capacitance of 1080 mF cm−2, which was significantly higher than that of the Co3O4/Ag2S//Co3O4/Ag2S symmetric supercapacitor (645 mF cm−2). These results show that the Co3O4/Cu2S composite heterostructure is a promising electrode architecture for high performance pseudocapacitors.

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Simple synthesis of core-shell structure of Co–Co3O4 @ carbon-nanotube-incorporated nitrogen-doped carbon for high-performance supercapacitor

Cited by 179 publications

References 54 publications

Nitrogen‐doping activated biomass carbon from tea seed shell for CO ₂ capture and supercapacitor

Nitrogen‐doping activated biomass carbon from tea seed shell for CO ₂ capture and supercapacitor

Using Peanut Shells to Construct a Porous MnO/C Composite Material with Highly Improved Lithium Storage Performance

Designing a Copper‐ and Silver‐Sulfide Composite with Co₃O₄ for High‐Performance Electrochemical Supercapacitors

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Simple synthesis of core-shell structure of Co–Co3O4 @ carbon-nanotube-incorporated nitrogen-doped carbon for high-performance supercapacitor

Cited by 179 publications

References 54 publications

Nitrogen‐doping activated biomass carbon from tea seed shell for CO 2 capture and supercapacitor

Nitrogen‐doping activated biomass carbon from tea seed shell for CO 2 capture and supercapacitor

Using Peanut Shells to Construct a Porous MnO/C Composite Material with Highly Improved Lithium Storage Performance

Designing a Copper‐ and Silver‐Sulfide Composite with Co3O4 for High‐Performance Electrochemical Supercapacitors

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Product

Resources

About

Nitrogen‐doping activated biomass carbon from tea seed shell for CO ₂ capture and supercapacitor

Nitrogen‐doping activated biomass carbon from tea seed shell for CO ₂ capture and supercapacitor

Designing a Copper‐ and Silver‐Sulfide Composite with Co₃O₄ for High‐Performance Electrochemical Supercapacitors