2. Origin and molecular mechanism behind the unique properties of soft carbon 2.1. Molecular structure of the pitch precursors Carbon-rich materials having a low content of heteroatoms (N, O, S, etc.) are the best precursors for soft carbon, such as petroleum pitch, coal tar pitch, few organic moieties, and coke.The weak crosslinking in these precursors means they become mobile at … - Download [PDF]
2. Origin and molecular mechanism behind the unique properties of soft carbon 2.1. Molecular structure of the pitch precursors Carbon-rich materials having a low content of heteroatoms (N, O, S, etc.) are the best precursors for soft carbon, such as petroleum pitch, coal tar pitch, few organic moieties, and coke.The weak crosslinking in these precursors means they become mobile at …
In order to apply to the high-power anode materials of lithium ion battery, various cokes samples were prepared by milling, pitch coating, and following heat treatment. ... @article{Kim2007PreparationAC, title={Preparation and Characterization of High-Power Anode Materials Using Soft Carbon Precursors for Lithium Ion Battery}, author={Taek Rae ...
Sodium-ion batteries (SIBs) have advantages in high sodium resources, providing powerful supplement to the current energy storage system. However, the lack of low-cost and high-performance anode materials still limits its practical application. Herein, a soft carbon anode derived from petroleum coke was successfully synthesized by engineering its composition and …
Soft carbons with porous structure have attracted increasing attention as attracting anode active materials for sodium-ion battery. However, the reported anode active materials are plagued by …
Energies 2020, 13, 4189 3 of 13 65% [25,26]. This is noteworthy that PVC pyrolysis releases toxic HCl gas and other possible precursor alternatives with more benign products can be of high interest.
Fig. 2 shows the voltage profile of soft carbon half cells with and without a silane coating. The voltage profile of the uncoated soft carbon electrode is illustrated in Fig. 2 a, which clearly demonstrates that the soft carbon can deliver a reversible capacity of about 200. mAh/g, and that the initial irreversible capacity loss (IRCL) for the uncoated soft carbon is 18.4%.
Soft carbon is a special class of carbon materials having tunable physical properties that makes it suitable for various battery applications. The precursors containing large polyaromatic hydrocarbons undergo mesophase formation via complex organic rearrangements, which endows soft carbon with unique attribu Research advancing UN SDG 7: Affordable and …
Silicon oxide (SiO x), inheriting the high-capacity characteristic of silicon-based materials but possessing superior cycling stability, is a promising anode material for next-generation Li-ion batteries.SiO x is typically applied in combination with graphite (Gr), but the limited cycling durability of the SiO x /Gr composites curtails large-scale applications.
DOI: 10.1246/CL.2003.1130 Corpus ID: 96402508; Soft Carbon-coated Hard Carbon Beads as a Lithium-ion Battery Anode Material @article{Yoshio2003SoftCH, title={Soft Carbon-coated Hard Carbon Beads as a Lithium-ion Battery Anode Material}, author={Masaki Yoshio and Hongyu Wang and Kenji Fukuda and Takeshi Abe and Zempachi Ogumi}, journal={Chemistry Letters}, …
Sodium-ion batteries (SIBs) have advantages in high sodium resources, providing powerful supplement to the current energy storage system.However, the lack of low-cost and high-performance anode materials still limits its practical application. Herein, a soft carbon anode derived from petroleum coke was successfully synthesized by engineering its composition and …
Advanced Energy Materials is your prime applied energy journal for research providing solutions to today''s global energy challenges. Abstract The rapid growth of lithium (Li) dendrites has long hindered the development of all-solid-state lithium-metal batteries (ASSLMB). ... (ASSLMB). Here, a composite soft carbon (SC)-nano Si 3 N 4 (SiN ...
Synergistic effect of soft carbon and hard carbon has been proven to be useful for obtaining excellent anode materials for potassium ion battery, which is determined by the mixing degree of precurs...
Pitch-Derived Soft Carbon as Stable Anode Material for Potassium Ion Batteries. Yuan Liu, ... It is confirmed that a simple thermal control can produce structurally optimized soft carbon that has much better battery performance than its widely reported carbon counterparts such as graphite and hard carbon.
Beijing Advanced Innovation Center for Materials Genome Engineering, Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190 China ... Herein, a multiple-diffusion-channel N,S-doped soft carbon with expanded layer spacing is designed ...
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Mesoporous soft carbon (MSC) was prepared from mesophase pitch using nano-CaCO3 as the template. The crystalline structure of soft carbon consists of a disordered region with a large interlayer distance benefitting …
The cycling stability of anode materials in potassium-ion batteries (KIBs) is challenged by the large size of K+ itself. The findings not only demonstrate the promising potential of soft carbon as a ...
Carbon materials have the advantages of large specific surface area, high electrical conductivity and high stability and are widely used as anode electrode materials for LIBs and LICs. However, the carbon materials directly used as electrodes without treatment have lower specific capacitance. ... Chen et al. [152] proposed a double carbon shell ...
Sodium-based dual ion full batteries (NDIBs) are reported with soft carbon as anode and graphite as cathode for the first time. The NDIBs operate at high discharge voltage plateau of 3.58 V, with superior discharge …
Silicon oxide (SiOx ), inheriting the high-capacity characteristic of silicon-based materials but possessing superior cycling stability, is a promising anode material for next-generation Li-ion ...
Pitch-Derived Soft Carbon as Stable Anode Material for Potassium Ion Batteries Adv Mater. 2020 Apr;32(17): e2000505. ... It is confirmed that a simple thermal control can produce structurally optimized soft carbon that has much better battery performance than its widely reported carbon counterparts such as graphite and hard carbon.
battery, the as-prepared soft carbon with hierarchical porous structure, rich sp2 carbon and doped N, O heteroatoms, exhibits an impressively high reversible ... As a result, the soft carbon anode active materials exhibit a high rever-sible capacity of 293 mAh g-1 at 0.05 A g-1, good rate capability (57 mAh g-1 at 5 A g-1) as well as remarkable ...
Extremely high capacity hard carbon for Na‐ion battery, delivering 478 mAh g ‐1, is successfully synthesized by heating a freeze‐dried mixture of magnesium gluconate and glucose via a MgO ...
Fast-charging sodium-ion batteries (SIBs) are expected to break the limit of long charging times and accelerate the development of grid-scale storage [1,2].So far, various anode materials (e.g., alloy, transition metal chalcogenides, and hard carbons) have been intensively investigated to accommodate more Na + for fast-charging SIBs [3–5].However, the large …
The FT-IR spectra of the three samples were shown in Fig. 1.The band originated from the aromatic C–H stretching (3100-3000 cm −1) and the aliphatic C–H stretching (3000-2750 cm −1) could be found.The peak at 1600 cm −1 was ascribed to the C C (sp 2) stretching vibration of the aromatic moiety substituted with aliphatic groups.The absorption …
Carbon materials are crucially important for the realization of potassium-ion batteries. However, the potassium storage mechanisms in various carbon materials are incompletely understood. Herein, solid-state 13C nuclear magnetic resonance (NMR) spectroscopy coupled with Raman and X-ray diffraction (XRD) techniques are employed to …