Carbonization of mesocarbon microbeads prepared from mesophase pitch with different anisotropic contents and their application in lithium-ion batteries

Gong, Xin; Lou, Bin; Yu, Ran; Zhang, Zhichen; Guo, Shuhai; Li, Gang; Wu, Bo; Liu, Dong

doi:10.1016/j.fuproc.2021.106832

Cited by 35 publications

(17 citation statements)

References 46 publications

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“…35 During the rst cathode scanning process of each Si@MCMB composite, there was an irreversible reduction peak of the rst cycles at 0.6-0.8 V, which was associated with the formation of an SEI on the electrode surface. 22,36 As shown in Fig. 6a, the MCMB composites showed similar charge-discharge performance, which was consistent with the cycling performance (Fig.…”

Section: Electrochemical Performancesupporting

confidence: 83%

“…As listed in Table 1 , the carbon structure parameters could be calculated from XRD. 22 The Si@MCMB composites showed a decrease in the interlayer spacing ( d m ) and an increase in the crystallite sizes ( L a and L c ) with the heat treatment temperature increasing from 800 to 1300 °C. The presence of a strong peak at 1350 cm −1 and a weak peak at 1605 cm −1 in Fig.…”

Section: Resultsmentioning

confidence: 97%

“…35 During the first cathode scanning process of each Si@MCMB composite, there was an irreversible reduction peak of the first cycles at 0.6–0.8 V, which was associated with the formation of an SEI on the electrode surface. 22,36…”

Section: Resultsmentioning

confidence: 99%

“…The long plateau at $0.4 V in the charge process originated from the Liion extraction. 19,22 The irreversible capacity loss of the rst two Si@MCMB anodes was mainly caused by the large specic surface area, aromatic heteroatoms and carbon layer structure, which caused the formation process of the SEI to consume too much lithium. In contrast, the last two Si@MCMB anodes had smaller surface areas, fewer aromatic heteroatoms and abundant pore channels and thus their rst coulombic efficiency was slightly better.…”

Section: Electrochemical Performancementioning

confidence: 99%

See 3 more Smart Citations

Investigation of the soft carbon microstructure in silicon/carbon anodes for superior lithium storage

Liu

et al. 2022

RSC Adv.

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Section: Electrochemical Performancesupporting

confidence: 83%

Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

Section: Electrochemical Performancementioning

confidence: 99%

See 2 more Smart Citations

Investigation of the soft carbon microstructure in silicon/carbon anodes for superior lithium storage

Liu

et al. 2022

RSC Adv.

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“…Generally, MCMBs are prepared by the thermal polycondensation of aromatic compounds, including coal tar pitch, petroleum pitch, heavy oil, anthracene oil, naphthalene, and biomass tar [ 10 , 11 , 12 , 13 , 14 ]. What is more, some researchers also report using a supercritical fluid extraction method and suspension method to prepare MCMBs with mesophase pitch as raw materials [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Mesocarbon Microbeads by the Co-Polycondensation of High-Temperature Coal Tar Pitch and Coal Pyrolytic Extracts

et al. 2022

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Mesocarbon microbeads (MCMBs) are a kind of engineering and functional artificial carbon materials generally prepared by the polymerization of polycyclic aromatic hydrocarbons. The physicochemical property of the raw materials plays a key role in the quality of MCMBs. For a detailed analysis of the synergistic effects of the generation of MCMBs, a high-temperature coal tar pitch was used as raw materials, and coal pyrolytic extracts were used as additive to synthesize the MCMBs. The microstructure and morphology of the derived MCMBs were determined by an optical microscope, scanning electron microscope, X-ray diffraction, Raman spectrum, and laser particle size analyzer. In fact, the addition of the coal pyrolytic extracts can adjust the molecular structure of the blending pitch, and the coal pyrolytic extracts can promote the generation of the MCMBs during the co-polycondensation process. The MCMBs obtained by co-polycondensation method have a good degree of sphericity, lower defects in the surface morphology, and a lower charge transfer resistance (Rct) of 4.677 Ω.

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Preparation of Pitch Porous Nitrogen‐doped Carbon and Its Low‐temperature Lithium Storage Properties

Dong,

Wang,

Shen

et al. 2024

ChemistrySelect

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The electrochemical performance of conventional lithium‐ion batteries are significantly deteriorates at low temperatures, posing a significant challenge in the development of battery technology. This paper addresses this issue by focusing on the synthesis of a nitrogen‐doped porous carbon material with fast lithium‐ion diffusion and reaction kinetics at low temperatures. The material was prepared using pitch as a precursor, urea as a nitrogen source and blowing agent, and SiO2 as a template. The obtained nitrogen‐doped porous carbon material (denoted as PN‐2) displayed a specific surface area of 167.64 m2/g and approximately five microcrystalline layers when the urea addition was 20%. Notably, at low temperatures, PN‐2 demonstrated an impressive discharge specific capacity, with average values of 372, 295, 254, and 197 mAh/g at 25 °C, 0 °C, −20 °C, and −40 °C, respectively. The large specific surface area of the porous carbon material effectively increased the active sites for lithium ions, promoting rapid diffusion and improved lithium/delithium kinetics, thus enhancing the multiplicity performance at low temperatures. This research provides the valuable insights for the design of high‐performance lithium‐ion battery materials suitable for cold climate environments.

show abstract

Carbonization of mesocarbon microbeads prepared from mesophase pitch with different anisotropic contents and their application in lithium-ion batteries

Cited by 35 publications

References 46 publications

Investigation of the soft carbon microstructure in silicon/carbon anodes for superior lithium storage

Investigation of the soft carbon microstructure in silicon/carbon anodes for superior lithium storage

Preparation and Characterization of Mesocarbon Microbeads by the Co-Polycondensation of High-Temperature Coal Tar Pitch and Coal Pyrolytic Extracts

Preparation of Pitch Porous Nitrogen‐doped Carbon and Its Low‐temperature Lithium Storage Properties

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