Hydrophilic and Conductive Carbon Nanotube Fibers for High-Performance Lithium-Ion Batteries

Ku, Nayoung; Cheon, Jaeyeong; Lee, Kyunbae; Jung, Young Bok; Yoon, Sung Jin; Kim, Taehoon

doi:10.3390/ma14247822

Cited by 8 publications

(11 citation statements)

References 38 publications

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“…Low-density CNTs demonstrate outstanding high-rate capabilities and cycle performance, according to tests on composite LiCoO 2 . For instance, SnO 2 -functionalized CNT derived from CNT functionalized with sulfonic acid was employed in lithium-ion battery anodes without the usage of a binder, conductive agent or current collector [ 196 , 197 ]. In this study, the SnO 2 @CNTF’s lithium storage capacity was determined using galvanostatic charge/discharge under the circumstances of a 100, 200, 500 and 1000 mA/g rate ( Figure 10 a,b).…”

Section: Applicationsmentioning

confidence: 99%

“…In this study, the SnO 2 @CNTF’s lithium storage capacity was determined using galvanostatic charge/discharge under the circumstances of a 100, 200, 500 and 1000 mA/g rate ( Figure 10 a,b). The SnO 2 particles created in this experiment have superior rate capability and cycle stability compared to pure silicon particles [ 196 ].…”

Section: Applicationsmentioning

confidence: 99%

“… ( a ) Rate performance at a current density ranging from 100 to 1000 mA/g of SnO 2 @CNTF and ( b ) relative values of the capacity [ 196 ]. Colours showed different specific capacities.…”

Section: Figurementioning

confidence: 99%

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Nanotube Functionalization: Investigation, Methods and Demonstrated Applications

2022

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This review presents an update on nanotube functionalization, including an investigation of their methods and applications. The review starts with the discussion of microscopy and spectroscopy investigations of functionalized carbon nanotubes (CNTs). The results of transmission electron microscopy and scanning tunnelling microscopy, X-ray photoelectron spectroscopy, infrared spectroscopy, Raman spectroscopy and resistivity measurements are summarized. The update on the methods of the functionalization of CNTs, such as covalent and non-covalent modification or the substitution of carbon atoms, is presented. The demonstrated applications of functionalized CNTs in nanoelectronics, composites, electrochemical energy storage, electrode materials, sensors and biomedicine are discussed.

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Section: Applicationsmentioning

confidence: 99%

Section: Applicationsmentioning

confidence: 99%

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Nanotube Functionalization: Investigation, Methods and Demonstrated Applications

2022

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“…In addition, to further improve the ionic and/or electronic conductivity of the electrode, some special conductive agents can be introduced into the LiFePO 4 -based electrodes, such as the traditional 0D conductive carbon black S-P (Super P), 1D carbon nanotubes, and 2D multilayer graphene. [28][29][30][31][32] Different types of conductive agents will affect the electrochemical interface impedance of the electrode materials in different ways and improve the rate capability and low-temperature charge-discharge performance of the battery. Among the abovementioned conductive agents, the 0D conductive carbon black S-P has a small contact area with the active material, so its conductivity is weaker than the other two kinds.…”

Section: Introductionmentioning

confidence: 99%

“…33 1D tubular conductive agent has excellent conductivity, but it is high price. 30,32 For 2D multilayer graphene, the forward flow of current is impeded due to the presence of sheets. 34 Therefore, combining a variety of conductive agents ensures the formation of a 0D-1D-2D conductive network, which greatly improves the conductivity and interface stability of the electrode materials.…”

Section: Introductionmentioning

confidence: 99%

Low‐temperature performance optimization of LiFePO₄‐based batteries

Wang

Song

et al. 2022

Asia-Pacific J Chem Eng

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LiFePO4 is one of the most widely used cathode materials for lithium‐ion batteries, and the low‐temperature performance of LiFePO4‐based batteries has been widely studied in recent years. Herein, a 3.5 Ah pouch‐type full battery was assembled using LiFePO4 as the cathode and artificial graphite as the anode. For the LiFePO4‐based cathode, carbon‐coated aluminum foil was selected as the current collector, and a 0D–1D–2D multi‐scale conductive network was introduced into the electrode. Notably, both the carbon‐coated current collector and novel conductive network could significantly reduce the internal resistance of the LiFePO4‐based battery, thus improving its electrochemical dynamics and low‐temperature performance. This paper provides a theoretical basis for the development of low‐temperature LiFePO4‐based batteries.

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Effect of S-doped carbon nanotubes as a positive conductive agent in lithium-ion batteries

Huang,

Guo,

Xiao

et al. 2024

Ionics

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In this paper, sulfur-doped carbon nanotubes were synthesized and modi ed at 600, 700 and 800°C. The results showed that the amount of sulfur doped in carbon nanotubes increased with the increase of temperature, which were 0.78%, 0.98%, and 1.07%, respectively, but the carbon/sulfur binding mode did not change. At the same time, sulfur doping signi cantly increased the speci c surface area, which was conducive to improving the in ltration of the electrolyte into the electrode piece. Sulfur-doped carbon nanotubes are used as conductive agents for the cathode NCM523 of lithium-ion batteries, and compared with untreated carbon nanotubes, they effectively improve the battery polarization, reduce the internal resistance, and greatly improve the ratio performance, and in terms of cycling performance, the capacity retention rate of the battery is increased from 71.3% to 81 ~ 85%. IntorductionLithium ion batteries have the characteristics of high energy density, high rate, and long cycle, which makes their market share in elds such as digital 3C and power vehicles increasingly widespread [1] . With the increasing demand for applications, some problems of lithium-ion batteries also urgently need to be solved. Most active materials used in cathode materials for lithium-ion batteries have poor conductivity, resulting in relatively large electrode internal resistance and low utilization of active material, which seriously affects the performance of the battery in terms of rate capability, cycling stability, and safety [2,3] , the contraction and expansion of materials in the process of charging and discharging also greatly affect the safety and life of the battery [4,5] . Conductive additives can increase the conductive contact between active materials, improve the electronic conductivity, generate micro-current between active materials and collector surfaces, reduce electrode contact resistance, accelerate electron mobility [5][6][7] .Therefore, it is often necessary to add additional conductive materials to improve battery performance.Due to the requirements for stability and resistance to acid and alkaline corrosion, conductive additives in lithium-ion batteries are mostly carbon-based materials [8][9][10][11] , including conductive carbon black, conductive graphite, carbon bers, graphene, and carbon nanotubes. In addition to their excellent electrical conductivity, carbon nanotubes have a ber-like structure that provides good exibility and mechanical stability [12][13][14] , It is conducive to improving the processability of the battery plate and the cycle life of the battery. Therefore, they are favored by researchers and manufacturers.Common preparation methods for carbon nanotubes include arc discharge, laser evaporation and chemical vapor deposition [15][16][17] . Due to the need for batch preparation, the chemical vapor deposition method is currently the most widely used. The resulting carbon nanotubes contain residual catalysts such as iron, cobalt, nickel, and aluminum. To remove these impurities, puri cation usi...

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Hydrophilic and Conductive Carbon Nanotube Fibers for High-Performance Lithium-Ion Batteries

Cited by 8 publications

References 38 publications

Nanotube Functionalization: Investigation, Methods and Demonstrated Applications

Nanotube Functionalization: Investigation, Methods and Demonstrated Applications

Low‐temperature performance optimization of LiFePO₄‐based batteries

Effect of S-doped carbon nanotubes as a positive conductive agent in lithium-ion batteries

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Hydrophilic and Conductive Carbon Nanotube Fibers for High-Performance Lithium-Ion Batteries

Cited by 8 publications

References 38 publications

Nanotube Functionalization: Investigation, Methods and Demonstrated Applications

Nanotube Functionalization: Investigation, Methods and Demonstrated Applications

Low‐temperature performance optimization of LiFePO4‐based batteries

Effect of S-doped carbon nanotubes as a positive conductive agent in lithium-ion batteries

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Low‐temperature performance optimization of LiFePO₄‐based batteries