Vacuum or flowing argon: What is the best synthesis atmosphere for nanodiamond-derived carbon onions for supercapacitor electrodes?

Zeiger, Marco; Jäckel, Nicolas; Weingarth, Daniel; Presser, Volker

doi:10.1016/j.carbon.2015.07.028

Cited by 61 publications

(56 citation statements)

References 72 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The thermal annealing of NDs at temperatures ranging from 1,100 to 1,900 °C results in an increase in the ratio of the number of carbon atoms sp 3 to sp 2 from 0.39 to 1. This process is also connected with a decrease in the density of CNOs (from 3.3 to 1.9 g cm −3 ), suggesting a change in the ND structure in the CNO . These last values are close to the density of ND (∼3.3 g cm −3 ) and graphite carbon (∼2.2 g cm −3 ) .…”

Section: Structure Of Cnos and Their Physico‐chemical Propertiessupporting

confidence: 55%

“…This process is also connected with a decrease in the density of CNOs (from 3.3 to 1.9 g cm À 3 ), suggesting a change in the ND structure in the CNO. [60][61][62][63][64] These last values are close to the density of ND (~3.3 g cm À 3 ) and graphite carbon (~2.2 g cm À 3 ). [63] At the same time, increasing the ND annealing temperature above 1,700°C leads to an increase in the electrical conductivity from 0 to approximately 4 S cm À 1 (Figure 2).…”

Section: Structure Of Cnos and Their Physico-chemical Propertiesmentioning

confidence: 75%

See 1 more Smart Citation

Carbon Nano‐Onions: A Review of Recent Progress in Synthesis and Applications

Płońska‐Brzezińska

2019

ChemNanoMat

View full text Add to dashboard Cite

This article presents a short review of the knowledge concerning multi‐layered fullerenes, also known as onion‐like carbons or carbon nano‐onions. In this article, the most important literature in this area is reviewed in a condensed way that presents these nanostructures, their unusual physical and chemical properties and their potential uses. This article focuses mainly on biomedical applications and areas where the electrochemical and electrocatalytic properties of these materials are applied. Currently, this field of research seems promising, and interest in this area is growing.

show abstract

Section: Structure Of Cnos and Their Physico‐chemical Propertiessupporting

confidence: 55%

Section: Structure Of Cnos and Their Physico-chemical Propertiesmentioning

confidence: 75%

Carbon Nano‐Onions: A Review of Recent Progress in Synthesis and Applications

Płońska‐Brzezińska

2019

ChemNanoMat

View full text Add to dashboard Cite

show abstract

“…This result is in good agreement with the previous publication that reported the oxidation of LGPS by electronic percolation pathways in the presence of carbon. Nonetheless, given the fact that the GHC/LPSCl cell showed much smaller anodic peaks than those of the AC/LPSCl cell, another factor such as functional group‐induced side reactions might also affect the different CV result between the two samples, which implies that the graphitic GHC might be more stable with LPSCl than AC.…”

Section: Resultsmentioning

confidence: 99%

Graphitic Hollow Nanocarbon as a Promising Conducting Agent for Solid‐State Lithium Batteries

Park

et al. 2019

Small

View full text Add to dashboard Cite

LIBs) are desirable to significantly increase to fulfill the growing demand for long distance per each charge. For this reason, next generation batteries such as Li-S, Li-O 2 , and Li-metal with exceptional energies have been attracted much attention as potential candidates due to their outstanding performances. [1][2][3][4][5] However, unfortunately, as a substantial amount of electrochemical energy should be stored in a confined volume, these systems are thermodynamically unstable, which could be a risk for safety incidents.In an attempt to overcome these drawbacks, the all-solid-state batteries (ASSBs) with all-solidified components are now considered as a promising next-generation technology beyond state-of-the-art LIBs. [6] The fascinating features of the ASSBs lie in the opportunity of enhancing energy density and surmounting the intrinsic shortcomings of conventional liquid-based batteries, such as electrolyte leakage, flammability, narrow voltage window, and low lithium ion transport number. In other words, the ASSBs are promising systems due to nonvolatile, nonexplosive, and stability up to ≈6.0 V versus Li/Li + . [6][7][8][9][10] In particular, if lithium metal can be employed as an anode material and interfacial stability can be improved, [11,12] it can be possible to achieve high energy and power density. These extraordinary properties of the ASSBs have extensively stimulated scientific and industry communities to the ASSB's research.In order to achieve superior electrochemical performances of the ASSBs, not only improving interfacial stability during the cycling, but balancing both ionic and electronic conductivities of composites is of crucial importance. For instance, while the electronic pathways appear to be more important for the high energy density ASSBs operating at relatively low current density, the sufficient ion transport is a more critical factor at high rate operations for the high power density ASSBs, [13,14] although the cell performances are relatively related to diverse factors such as the operating pressure/temperature, particle size, and composition in the electrode. In terms of enhancement of the ionic conductivity, extensive efforts for developing solid electrolyte (SE) with high ionic conductivity have been conducted for past few decades. Among diverse candidates, much attention has been focused on the sulfide-based SE including Li 10 GeP 2 S 12 (LGPS), [7,15] β-Li 3 PS 4 , [16] Li 7 P 3 S 11 , [17] Li 2 S-P 2 S 5 , [18] and argyrodite All-solid-state batteries (ASSBs) have lately received enormous attention for electric vehicle applications because of their exceptional stability by engaging all-solidified cell components. However, there are many formidable hurdles such as low ionic conductivity, interface instability, and difficulty in the manufacturing process, for its practical use. Recently, carbon, one of the representative conducting agents, turns out to largely participate in side reactions with the solid electrolyte, which finally leads to the formation of insulating sid...

show abstract

“…Structurally, carbon onions are small carbon quasi-nanospheres composed of concentrically stacked graphitic shells 19 , usually without inner porosity and surface area values in the range of 200-600 m 2 /g 20 . A facile and scalable synthesis route for carbon onions is the thermal annealing of nanodiamond powders in inert atmosphere or vacuum 21 . During the annealing process, sp 3 -hybridized nanodiamond is progressively converted to quasi-spherical sp 2 -carbon onions, yielding particles of about 5-10 nm in diameter 19 .…”

Section: Introductionmentioning

confidence: 99%

Enhanced Electrochemical Energy Storage by Nanoscopic Decoration of Endohedral and Exohedral Carbon with Vanadium Oxide via Atomic Layer Deposition

et al. 2016

Self Cite

View full text Add to dashboard Cite

Atomic layer deposition (ALD) is a facile process to decorate carbon surfaces with redox-active nanolayers. This is a particularly attractive route to obtain hybrid electrode materials for high performance electrochemical energy storage applications. Using activated carbon and carbon onions as representatives of substrate materials with large internal or external surface area, respectively, we have studied the enhanced energy storage capacity of vanadium oxide coatings. While the internal porosity of activated carbon readily becomes blocked by obstructing nanopores, carbon onions enable the continued deposition of vanadia within their large interparticle voids. Electrochemical benchmarking in lithium perchlorate in acetonitrile (1 M LiClO 4 ) showed a maximum capacity of 122 mAh/g when using vanadia coated activated carbon and 129 mAh/g for vanadia coated carbon onions. There is an optimum amount of vanadia between 50-65 wt.% for both substrates that results in an ideal balance between redox-activity and electrical conductivity of the hybrid electrode. Assembling asymmetric (charge balanced) full-cells, a maximum specific energy of 38 Wh/kg and 29 Wh/kg was found for carbon onions or activated carbon, respectively. The stability of both systems is promising, with a capacity retention of ~85-91 % after 7,000 cycles for full-cell measurements.

show abstract

Vacuum or flowing argon: What is the best synthesis atmosphere for nanodiamond-derived carbon onions for supercapacitor electrodes?

Cited by 61 publications

References 72 publications

Carbon Nano‐Onions: A Review of Recent Progress in Synthesis and Applications

Carbon Nano‐Onions: A Review of Recent Progress in Synthesis and Applications

Graphitic Hollow Nanocarbon as a Promising Conducting Agent for Solid‐State Lithium Batteries

Enhanced Electrochemical Energy Storage by Nanoscopic Decoration of Endohedral and Exohedral Carbon with Vanadium Oxide via Atomic Layer Deposition

Contact Info

Product

Resources

About