Influence of carbonaceous materials on electronic conduction in electrode-slurry

Takeno, Mitsuhiro; Fukutsuka, Tomokazu; Miyazaki, Kohei; Abe, Takeshi

doi:10.1016/j.carbon.2017.06.072

Cited by 26 publications

(17 citation statements)

References 24 publications

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“…This might be explained by the delithiation at 1.1 and 1.7 V vs. Li/Li + changing to more surface‐controlled reactions for the hybrid materials ( b ‐value: 0.7) in comparison to the non‐hybrid materials ( b ‐value: 0.6)as revealed by kinetics analysis (Supporting Information, Figure S6). In addition, the amount of conductive carbon in the electrodes and a uniform carbon distribution to generate an electron conduction path will affect the rate handling ability [29] . Therefore, the better rate capability of TNO‐OLC‐CO 2 compared to TNO‐CB‐CO 2 might be correlated with the higher amount of carbon and better carbon distribution (Table 1, and Supporting Information, Figure S7).…”

Section: Resultsmentioning

confidence: 99%

“…In addition, the amount of conductive carbon in the electrodes and a uniform carbon distribution to generate an electron conduction path will affect the rate handling ability. [29] Therefore, the better rate capability of TNO-OLC-CO 2 compared to TNO-CB-CO 2 might be correlated with the higher amount of carbon and better carbon distribution ( Table 1, and Supporting Information, Figure S7).…”

Section: Electrochemical Analysismentioning

confidence: 99%

See 1 more Smart Citation

Titanium Niobium Oxide Ti₂Nb₁₀O₂₉/Carbon Hybrid Electrodes Derived by Mechanochemically Synthesized Carbide for High‐Performance Lithium‐Ion Batteries

et al. 2020

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This work introduces the facile and scalable two-step synthesis of Ti 2 Nb 10 O 29 (TNO)/carbon hybrid material as a promising anode for lithium-ion batteries (LIBs). The first step consisted of a mechanically induced self-sustaining reaction via ball-milling at room temperature to produce titanium niobium carbide with a Ti and Nb stoichiometric ratio of 1 to 5. The second step involved the oxidation of as-synthesized titanium niobium carbide to produce TNO. Synthetic air yielded fully oxidized TNO, while annealing in CO 2 resulted in TNO/carbon hybrids. The electrochemical performance for the hybrid and non-hybrid electrodes was surveyed in a narrow potential window (1.0-2.5 V vs. Li/Li +) and a large potential window (0.05-2.5 V vs. Li/ Li +). The best hybrid material displayed a specific capacity of 350 mAh g À 1 at a rate of 0.01 A g À 1 (144 mAh g À 1 at 1 A g À 1) in the large potential window regime. The electrochemical performance of hybrid materials was superior compared to non-hybrid materials for operation within the large potential window. Due to the advantage of carbon in hybrid material, the rate handling was faster than that of the non-hybrid one. The hybrid materials displayed robust cycling stability and maintained ca. 70 % of their initial capacities after 500 cycles. In contrast, only ca. 26 % of the initial capacity was maintained after the first 40 cycles for non-hybrid materials. We also applied our hybrid material as an anode in a full-cell lithium-ion battery by coupling it with commercial LiMn 2 O 4 .

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Section: Resultsmentioning

confidence: 99%

Section: Electrochemical Analysismentioning

confidence: 99%

Titanium Niobium Oxide Ti₂Nb₁₀O₂₉/Carbon Hybrid Electrodes Derived by Mechanochemically Synthesized Carbide for High‐Performance Lithium‐Ion Batteries

et al. 2020

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“…Generally, the powder resistivity measurement method is used to investigate the electrical properties of the powder samples 25,26 . To measure the electrical properties, it is necessary for the powder sample to be formulated as a pellet under pressurization.…”

Section: Introductionmentioning

confidence: 99%

“…Since the resistivity or the conductivity of a sample is an intrinsic property, it should be equal or close to that of the CVD–grown graphene. Another candidate parameter to should be considered is volume resistivity or volume conductivity which is a function of the given pressure 26 . Accordingly, we selected the following parameters to determine how well they represent the quality of graphene flakes in this study: (i) sheet resistance (or conductance), (ii) resistivity (or conductivity), and (iii) volume resistivity (or volume conductivity).…”

Section: Introductionmentioning

confidence: 99%

Elucidation of an intrinsic parameter for evaluating the electrical quality of graphene flakes

Lee

Kim

Lee

et al. 2019

Sci Rep

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A test method for evaluating the quality of graphene flakes, such as reduced graphene oxide (rGO) and graphene nanopowder (GNP), was developed in this study. The pelletizer was selected for a sampling tool, which enables us to formulate the flake sample as a measurable sample. Various parameters were measured from the pelletized sample in order to elucidate the best parameter for representing the quality of the graphene flakes in terms of their electrical properties. Based on the analysis of 4-probe measurement data on the pelletized sample, the best intrinsic parameter is volume resistivity (or volume conductivity) rather than resistivity (or conductivity). Additionally, the possible modification of a sample before and after the pressurization was investigated by electron microscopy and Raman spectroscopy. No significant modification was observed. The volume conductivity in the two types of the graphene was different from their individual conductivities by one order of magnitude. Based on the results of X-ray photoelectron spectroscopy and Raman spectroscopy measurements, the volume conductivity of the graphene flake samples was governed by the oxygen content in the sample. Our achievements will promote the effective use of powder-type graphene products for further applications.

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“…Carbon materials with different structures and dimensions have been widely used as conductive additives for most commercial LIBs due to their high electronic and thermal conductivity, good chemical stability and light weight [9,[11][12][13][14] . Besides the conventional carbon materials, such as carbon black and graphite powder, new carbon materials with higher conductivity, such as carbon nanotubes, vapor grown carbon fibers and graphene also show great potential for the application as conductive additives in recent years [14][15][16][17][18] .…”

Section: Introductionmentioning

confidence: 99%

Choice for graphene as conductive additive for cathode of lithium-ion batteries

Shi

Lei

Pei

et al. 2019

Journal of Energy Chemistry

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Influence of carbonaceous materials on electronic conduction in electrode-slurry

Cited by 26 publications

References 24 publications

Titanium Niobium Oxide Ti₂Nb₁₀O₂₉/Carbon Hybrid Electrodes Derived by Mechanochemically Synthesized Carbide for High‐Performance Lithium‐Ion Batteries

Titanium Niobium Oxide Ti₂Nb₁₀O₂₉/Carbon Hybrid Electrodes Derived by Mechanochemically Synthesized Carbide for High‐Performance Lithium‐Ion Batteries

Elucidation of an intrinsic parameter for evaluating the electrical quality of graphene flakes

Choice for graphene as conductive additive for cathode of lithium-ion batteries

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Influence of carbonaceous materials on electronic conduction in electrode-slurry

Cited by 26 publications

References 24 publications

Titanium Niobium Oxide Ti2Nb10O29/Carbon Hybrid Electrodes Derived by Mechanochemically Synthesized Carbide for High‐Performance Lithium‐Ion Batteries

Titanium Niobium Oxide Ti2Nb10O29/Carbon Hybrid Electrodes Derived by Mechanochemically Synthesized Carbide for High‐Performance Lithium‐Ion Batteries

Elucidation of an intrinsic parameter for evaluating the electrical quality of graphene flakes

Choice for graphene as conductive additive for cathode of lithium-ion batteries

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Product

Resources

About

Titanium Niobium Oxide Ti₂Nb₁₀O₂₉/Carbon Hybrid Electrodes Derived by Mechanochemically Synthesized Carbide for High‐Performance Lithium‐Ion Batteries

Titanium Niobium Oxide Ti₂Nb₁₀O₂₉/Carbon Hybrid Electrodes Derived by Mechanochemically Synthesized Carbide for High‐Performance Lithium‐Ion Batteries