Observation of the intercalation of dimethyl sulfoxide-solvated lithium ion into graphite and decomposition of the ternary graphite intercalation compound using in situ Raman spectroscopy

Maruyama, Shohei; Fukutsuka, Tomokazu; Miyazaki, Kohei; Abe, Takeshi

doi:10.1016/j.electacta.2018.01.035

Cited by 32 publications

(15 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The 10–30 cm −1 upshift in G band is due to different factors, such as defect, strain, doping and number of layers 39 . D band of CoCNC@SiO 2 (3) appears at ~ 1350 cm −1 which is consistent with D band of defect graphite 40 , while CoCNC (2) shows D band at 1370 cm −1 . The shift in D band can be attributed to the presence of oxygen-containing functional groups (as indicated by XPS) which leads to different bond distance of C–C and eventually structural distortion of graphene 41 .…”

Section: Resultssupporting

confidence: 71%

Novel cobalt–carbon@silica adsorbent

Alotaibi

Hammud

Otaibi

et al. 2020

Sci Rep

View full text Add to dashboard Cite

Recently, carbon nanostructures are of high importance due to their unique characteristics and interesting applications. Pyrolysis of anthracene with cobalt complex Co(2,2′-bipy)Cl2(1), where (2,2′-bipy) is 2,2′-bipyridine, in the absence and presence of silica gave in high yield cobalt-carbon nanocomposite CoCNC (2) and CoCNC@SiO2(3) at 600 °C and 850 °C, respectively. They were characterized using SEM, TEM, PXRD, Raman and XPS. (3) and (2) contain core–shell cobalt(0)/cobalt oxide-graphite with or without silica support. PXRD indicates that (2) contains crystalline hexagonal α-Co and cubic β-Co phases while (3) contains only cubic β-Co phase and silica. The structure of (2) is 3D hierarchical carbon architecture wrapping spherical and elliptical cobalt nanoparticles. (3) consists of graphitized structures around cobalt nanoparticles embedded in the silica matrix. XPS reveals that the nanocomposites contain oxygen functional groups that enhance uptake of cationic dyes. CoCNC@SiO2(3) has higher capacity and thus is better adsorbent of Basic Violet 3 than CoCNC (2). The Langmuir adsorption capacity of (3) is 19.4 mg g−1 while column capacity is 12.55 mg g−1 at 25 °C. Freundlich isotherm and pseudo-second-order kinetic models fit well the adsorption data. Thermodynamics indicate that adsorption(3) is exothermic. Column regeneration was tested for three cycles and Yan et al. was found the best kinetic model.

show abstract

Section: Resultssupporting

confidence: 71%

Novel cobalt–carbon@silica adsorbent

Alotaibi

Hammud

Otaibi

et al. 2020

Sci Rep

View full text Add to dashboard Cite

show abstract

“…Among all the components of lithium-ion battery, electrode materials are the key factors that restrict the performance of lithium-ion batteries. Among them, negative electrode material, as an important part of lithium ion battery, has an important influence on the electrochemical performance of lithium ion battery (Chen et al, 2016a,b;Wang et al, 2017;Maruyama et al, 2018;Xu et al, 2018Xu et al, , 2019Zhu et al, 2018;Xiao et al, 2019). In lithium ion battery anode material, carbon material has the advantages of low electrode potential, high cycle efficiency, long cycle life, and good safety performance, makes it the preferred anode material for lithium-ion batteries.…”

Section: Introductionmentioning

confidence: 99%

“…In lithium ion battery anode material, carbon material has the advantages of low electrode potential, high cycle efficiency, long cycle life, and good safety performance, makes it the preferred anode material for lithium-ion batteries. At present, graphite is a common carbon anode material, which has a good layered structure suitable for lithium ion embedding and deintercalation, which makes it show the advantages of high conductivity and high reversible specific capacity, and has become a widely used traditional commercial negative electrode material (Cameán and Garcia, 2011;Huang et al, 2012;Ni et al, 2014;Kim et al, 2017;Raccichini et al, 2017;Maruyama et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Polyacrylonitrile Hard Carbon as Anode of High Rate Capability for Lithium Ion Batteries

Rao

Lou

et al. 2020

Front. Energy Res.

View full text Add to dashboard Cite

In order to develop new type of carbon anode material with high performance, a novel organic carbon material polyacrylonitrile (PAN) hard carbon was prepared by calcination of polypropylene cyanide at 1,050 • C. The obtained PAN hard carbon is used as the negative electrode material of lithium ion battery, showing an initial capacity of 343.5 mAh g −1 which is equal to that of graphite electrode (348.6 mAh g −1 ), and a higher initial coulomb efficiency of 87.9% than that of graphite electrode (84.4%). Moreover, the PAN hard carbon electrode shows superior cycle stability and rate performance at different current rates. The charge capacities are 320.1, 219.0, 212.9, and 123.5 mAh g −1 at current rates of 0.2, 1, 2, and 3 C, with coulombic efficiencies of 98.1, 100.6, 88.1, and 110.0%, respectively, which are higher than those of graphite electrode (83.8, 97.6, 98.8, and 94.1%). In addition, the charging capacity of PAN hard carbon electrode can still remain at 284.3 mAh g −1 (0.2 C after 200 cycles), 226.4 mAh g −1 (1 C after 300 cycles), 149.5 mAh g −1 (2 C after 400 cycles), and 120.0 mAh g −1 (3 C after 100 cycles), with capacity retention rates of 78.2, 111.9, 79.7, and 88.6%, respectively. The capacity and capacity retention rate after cycling are significantly higher than those of graphite electrode, indicating that the PAN hard carbon electrode shows superior rate performance, which would provide a new idea for the development of novel negative electrode material with high performance.

show abstract

“…The 12 cm −1 upshift in G band is due to strain, doping and the number of layers present in the HPC-Co nanocomposite [41]. The observed D band at 1339 cm −1 is characteristic of sp 3 disordered or defected graphitic carbon, while the typical D band of defect graphite occurs at ~1350cm −1 [42]. The shift in D band is due to oxygen functional groups in the HPC-Co (as XPS revealed) which caused variation in bond distances of C-C and thus distortion of graphene [43].…”

Section: Characterization Of Nanocompositesmentioning

confidence: 96%

Hierarchical Porous Carbon Cobalt Nanocomposites-Based Sensor for Fructose

et al. 2020

View full text Add to dashboard Cite

3D hierarchical graphitic carbon nanowalls encapsulating cobalt nanoparticles HPC-Co were prepared in high yield from solid-state pyrolysis of cobalt 2,2′-bipyridine chloride complex. Annealing of HPC-Co in air gave HPC-CoO, which consists of a mixture of crystallite Co3O4 nanospheres and nanorods bursting out of mesoporous carbon. Both nanocomposites were fully characterized using SEM, TEM, BET, and powder X-ray diffraction. The elemental composition of both nanocomposites examined using SEM elemental mapping and TEM elemental mapping supports the successful doping of nitrogen. The powder X-ray diffraction studies supported the formation of hexagonal cobalt in HPC-Co, and cubic crystalline Co3O4 with cubic cobalt in HPC-CoO. HPC-Co and HPC-CoO can be used as a modified carbon electrode in cyclic voltammetry experiments for the detection of fructose with limit of detection LOD 0.5 mM. However, the single-frequency impedimetric method has a wider dynamic range of 8.0–53.0 mM and a sensitivity of 24.87 Ω mM−1 for the electrode modified with HPC-Co and 8.0–87.6 mM and a sensitivity of 1.988 Ω mM−1 for the electrode modified with HPC-CoO. The LOD values are 3 and 4 mM, respectively. The effect of interference increases in the following order: ascorbic acid, ethanol, urea, and glucose. A simple method was used with negligible interference from glucose to measure the percentage of fructose in a corn syrup sample with an HPC-CoO electrode. A specific capacitance of 47.0 F/g with 76.6% retentivity was achieved for HPC-Co and 28.2 F/g with 87.9% for HPC-CoO for 3000 charge–discharge cycles. Thus, (1) has better sensitivity and specific capacitance than (2), because (1) has a higher surface area and less agglomerated cobalt nanoparticles than (2).

show abstract

Observation of the intercalation of dimethyl sulfoxide-solvated lithium ion into graphite and decomposition of the ternary graphite intercalation compound using in situ Raman spectroscopy

Cited by 32 publications

References 11 publications

Novel cobalt–carbon@silica adsorbent

Novel cobalt–carbon@silica adsorbent

Polyacrylonitrile Hard Carbon as Anode of High Rate Capability for Lithium Ion Batteries

Hierarchical Porous Carbon Cobalt Nanocomposites-Based Sensor for Fructose

Contact Info

Product

Resources

About