Toward a remarkable Li-S battery via 3D printing

Gao, Xuejie; Sun, Qian; Yang, Xiaofei; Liang, Jianneng; Koo, Alicia; Li, Weihan; Liang, Jianwen; Wang, Jiwei; Li, Ruying; Holness, F. Benjamin; Price, Aaron D.; Yang, Shengxue; Sham, Tsun‐Kong; Sun, Xueliang

doi:10.1016/j.nanoen.2018.12.001

Cited by 129 publications

(95 citation statements)

References 44 publications

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“…In comparison, this peak moves back to a higher angle with the further increased temperature of 800 °C, and the corresponding interlayer spacing is 0.380 nm. As shown in Figure b, two Raman bands centered at 1359 and 1584 cm −1 are respectively indexed to D mode (presence of structural disorders) and G mode (indication of graphitic feature) of carbonaceous materials . The obvious D band indicates the highly disordered structure of CNSs.…”

Section: Resultsmentioning

confidence: 96%

Disordered, Large Interlayer Spacing, and Oxygen‐Rich Carbon Nanosheets for Potassium Ion Hybrid Capacitor

Chen

Yang

Hou³

et al. 2019

Advanced Energy Materials

249

212

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Potassium ion storage technology as a promising substitute for the well‐developed lithium ion storage technology is still at the infancy stage of development, and exploring suitable electrode materials is critical for its practical application. Here, the great feasibility of disordered, large interlayer spacing, and oxygen‐rich carbon nanosheets (CNSs) prepared by chemical vapor deposition for potassium ion storage applications is demonstrated. As an anode material, the CNSs exhibit outstanding rate capability as well as excellent cyclic stability. Taking advantage of this, a potassium ion hybrid capacitor (PIHC) is constructed by employing such CNSs as the battery‐type anode and activated carbon as the capacitor‐type cathode. The resulting device displays a high energy density of 149 Wh kg−1, an ultrahigh power output of 21 kW kg−1, as well as a long cycling life (80% capacity retention after 5000 cycles), which are all close to the state‐of‐the‐art values for PIHCs. This work promotes the development of high‐performance anode material for potassium ion storage devices, and the designed PIHC pushes the energy density and power density to a higher level.

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Section: Resultsmentioning

confidence: 96%

Disordered, Large Interlayer Spacing, and Oxygen‐Rich Carbon Nanosheets for Potassium Ion Hybrid Capacitor

Chen

Yang

Hou³

et al. 2019

Advanced Energy Materials

249

212

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“…However, the commonly used commercial Pt/C catalysts are limited by their exorbitant prices, scarce reserves, and inferior long‐term stability . With regard to electrochemical supercapacitors, more efficient electrode materials are urgently needed to meet the requirements of larger energy density, higher rate capability, and better wearability …”

Section: Figurementioning

confidence: 99%

Effects of Intrinsic Pentagon Defects on Electrochemical Reactivity of Carbon Nanomaterials

et al. 2019

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Theoretical calculations reveal that intrinsic pentagons in the basal plane can contribute to the local electronic redistribution and the contraction of band gap, making the carbon matrix possess superior binding affinity and electrochemical reactivity. To experimentally verify this, a pentagon‐defect‐rich carbon nanomaterial was constructed by means of in situ etching of fullerene molecules (C60). The electrochemical tests show that, relative to hexagons, such a carbon‐based material with abundant intrinsic pentagon defects makes much greater contribution to the electrocatalytic oxygen reduction activity and electric double layer capacitance. It shows a four‐electron‐reaction mechanism similar to commercial Pt/C and other transition‐metal‐based catalysts, and a higher specific capacitance than many reported metal‐free carbon materials. These results show the influence of intrinsic pentagon defects for developing carbon‐based nanomaterials toward energy conversion and storage devices.

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“…In this context, it must be noted that N-doped and B-doped fullerene have been proved to exhibit ORR electrocatalysis based on theoretical and experimental perspectives. [21,54] However, pristine fullerene seldom shows ORR electrocatalysis. Hence, based on our results that the Cu/Cu 2 O incorporated C 60 contributes to the significant ORR electrocatalysis.…”

Section: Electrocatalytic Performance Evaluation Toward Oxygen Reductmentioning

confidence: 99%

“…Recent reports have demonstrated that doped C 60 and/or its functionalized counterparts can be utilized for ORR electrocatalysis. [21,22] It is to be noted that not only the chemical components but also other physicochemical characteristics such as porosity, the microstructure, the amount of accessible active centers for electrocatalytic reactions and nanocarbon-catalyst particles interfacial interactions can influence the ORR efficiency. Recently, we have demonstrated the preparation of highly ordered mesoporous fullerene nanostructures with different carbon compositions and applied them for energy conversion applications.…”

Section: Introductionmentioning

confidence: 99%

Mixed Copper/Copper‐Oxide Anchored Mesoporous Fullerene Nanohybrids as Superior Electrocatalysts toward Oxygen Reduction Reaction

Saianand

Gopalan

Lee

et al. 2019

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Developing a highly active, stable, and efficient non‐noble metal‐free functional electrocatalyst to supplant the benchmark Pt/C‐based catalysts in practical fuel cell applications remains a stupendous challenge. A rational strategy is developed to directly anchor highly active and dispersed copper (Cu) nanospecies on mesoporous fullerenes (referred to as Cu‐MFC60) toward enhancing oxygen reduction reaction (ORR) electrocatalysis. The preparation of Cu‐MFC60 involves i) the synthesis of ordered MFC60 via the prevalent nanohard templating technique and ii) the postfunctionalization of MFC60 with finely distributed Cu nanospecies through incipient wet impregnation. The concurrence of Cu and cuprous oxide nanoparticles in the as‐developed Cu‐MFC60 samples through relevant material characterizations is affirmed. The optimized ORR catalyst, Cu(15%)‐MFC60, exhibits superior electrocatalytic ORR characteristics with an onset potential of 0.860 vs reversible hydrogen electrode, diffusion‐limiting current density (−5.183 mA cm−2), improved stability, and tolerance to methanol crossover along with a high selectivity (four‐electron transfer). This enhanced ORR performance can be attributed to the rapid mass transfer and abundant active sites owing to the synergistic coupling effects arising from the mixed copper nanospecies and the fullerene framework.

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Toward a remarkable Li-S battery via 3D printing

Cited by 129 publications

References 44 publications

Disordered, Large Interlayer Spacing, and Oxygen‐Rich Carbon Nanosheets for Potassium Ion Hybrid Capacitor

Disordered, Large Interlayer Spacing, and Oxygen‐Rich Carbon Nanosheets for Potassium Ion Hybrid Capacitor

Effects of Intrinsic Pentagon Defects on Electrochemical Reactivity of Carbon Nanomaterials

Mixed Copper/Copper‐Oxide Anchored Mesoporous Fullerene Nanohybrids as Superior Electrocatalysts toward Oxygen Reduction Reaction

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