Purification of Multi Walled Carbon Nanotubes (Mwcnts) Synthesized by Arc Discharge Set Up

Malathi, Y.; Padya, Balaji; Prabhakar, Karan; Jain, Pradeep

doi:10.5714/cl.2010.11.3.184

Cited by 8 publications

(5 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The arc-discharged cathode deposit was prepared according to the ref , and was used as an additional CA. Powder X-ray diffraction studies of the arc discharged cathode were carried out using a Bruker D8 instrument with a Cu Kα source (λ = 1.5406 Å).…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Multilayer Graphene as a Cathode Conductive Additive in Lithium-Ion Pouch Cells: A Correlation of Changes in Electrolyte Uptake and Composition of the Electrode Electrolyte Interface with Enhanced Cycling Stability

Peddi

Sahana

Budumuru

et al. 2023

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

The electrochemical performance of the lithium-ion battery is significantly affected by the choice of electrode conductive additives. In this study, a mixed conductive additive with an equal proportion of multilayer-graphene (MLG) and carbon black (CB) is used in LiNi 1/3 Mn 1/3 Co 1/3 O 2 (NMC-CB-MLG) electrodes. The electrochemical performance of these electrodes is compared at coin cell and pouch cell formats with that of the LiNi 1/3 Mn 1/3 Co 1/3 O 2 (NMC) electrodes prepared with CB alone as a conductive additive (NMC-CB). While CB independently increases rate capability, mixing MLG with CB as a conductive additive enhances cycling stability. The pouch cells fabricated using the NMC-CB-MLG electrode show a superior capacity retention of 80% after 730 cycles at 1C, compared to 65% at 320 cycles of NMC-CB. The differences in the capacity retention of both cells are correlated with the electrolyte uptake and stability of the electrode−electrolyte interface (EEI) due to changes in the chemical composition as investigated using X-ray photoelectron spectroscopy. The main reasons for the capacity fade of NMC-CB are explained by the formed unstable EEI and cathode electrode cracking, which lead to loss of lithium inventory and loss of active materials. This study concludes that MLG mixed with CB can be used as a conductive additive in commercial large-format lithium-ion high energy cells.

show abstract

Section: Methodsmentioning

confidence: 99%

“…Multilayer graphene (MLG) synthesized via an arc discharge method , mixed with an equal proportion of CB is used as a cathode conductive additive. Its influence on the cycling stability is compared with the CB electrode by fabricating a ∼0.5 Ah LiNi 1/3 Mn 1/3 Co 1/3 O 2 -graphite pouch cell.…”

Section: Introductionmentioning

confidence: 99%

Multilayer Graphene as a Cathode Conductive Additive in Lithium-Ion Pouch Cells: A Correlation of Changes in Electrolyte Uptake and Composition of the Electrode Electrolyte Interface with Enhanced Cycling Stability

Peddi

Sahana

Budumuru

et al. 2023

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

show abstract

“…CNTs have also been used as extremely strong nano-reinforcements for composites; such composites possess extraordinarily high strength with a low weight and with moderate electrostatic discharge properties [6][7][8][9][10][11]. However, the use of CNTs with composites has been largely hampered by their poor dispersion in polymer resins and weak interfacial bonding with polymer matrices.…”

Section: Introductionmentioning

confidence: 98%

“…However, the use of CNTs with composites has been largely hampered by their poor dispersion in polymer resins and weak interfacial bonding with polymer matrices. Therefore, surface modifications have been necessary to improve the functionality of CNTs for such applications [8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Roles of Ni/CNTs hybridization on rheological and mechanical properties of CNTs/epoxy nanocomposites

Kim

Bae

Seo

et al. 2011

Materials Science and Engineering: A

View full text Add to dashboard Cite

“…Indeed, although the material synthesized by the arc discharge is 100% carbon-made, only about 30 to 70% (weight) of the solid produced corresponds to actual MWCNTs. The rest are carbon nanoparticles such as amorphous carbon, graphenic (i.e., made of graphene) shells, and fullerene derivatives such as nanohorns [3,4]. Purifying the material while being highly selective was then a difficult task not only because of the chemical similarity but also the structural similarity between the unwanted material and the MWCNTs, as they all are graphene-based carbons (but amorphous carbon, which is highly rich in sp 3 -C).…”

Section: Introductionmentioning

confidence: 99%

Burn Them Right! Determining the Optimal Temperature for the Purification of Carbon Materials by Combustion

Picheau

Hof

Derré

et al. 2022

View full text Add to dashboard Cite

A new purification procedure for carbon nanoforms is proposed. It was tested on multiwall carbon nanotubes (MWCNTs) prepared by arc discharge, which is among the most challenging of cases due to the chemical and structural similarity between the MWCNTs and most of the impurities to be removed. Indeed, the various methods for synthesizing carbon nanoforms lead to a distribution of carbonaceous products, such as carbon shells, carbon spheres, fullerenes, and a variety of other species. Thus, many strategies to purify the desired products have been developed. Among the most successful ones, thermal oxidation (combustion) seems particularly efficient. To be successful while preserving a reasonable amount of MWCNTs, the combustion temperature has to be carefully selected. Moreover, the ideal combustion temperature does not only depend on the material to be treated but also on the overall system used to perform the reaction, including the reactor type and the parameters of the gaseous reactant. Typically, the optimization of the purification relies on multiple experiments and analysis of the products. However, to the best of our knowledge, a strategy to determine a priori the most suitable temperature has not been reported yet. We demonstrate here that a thermogravimetric method, namely the constant decomposition rate thermal analysis (CRTA), is particularly well adapted to answer this question. An isothermal treatment based on the results obtained from a CRTA program allowed arc-MWCNTs to be successfully purified from graphenic shells while optimizing the yield of the MWCNTs. This strategy is believed to be valuable not only for purifying MWCNTs but also for the purification of other carbonaceous forms, including new carbon nanoforms.

show abstract

Purification of Multi Walled Carbon Nanotubes (Mwcnts) Synthesized by Arc Discharge Set Up

Cited by 8 publications

References 31 publications

Multilayer Graphene as a Cathode Conductive Additive in Lithium-Ion Pouch Cells: A Correlation of Changes in Electrolyte Uptake and Composition of the Electrode Electrolyte Interface with Enhanced Cycling Stability

Multilayer Graphene as a Cathode Conductive Additive in Lithium-Ion Pouch Cells: A Correlation of Changes in Electrolyte Uptake and Composition of the Electrode Electrolyte Interface with Enhanced Cycling Stability

Roles of Ni/CNTs hybridization on rheological and mechanical properties of CNTs/epoxy nanocomposites

Burn Them Right! Determining the Optimal Temperature for the Purification of Carbon Materials by Combustion

Contact Info

Product

Resources

About