Synergistic role of carbon nanotube and SiCn reinforcements on mechanical properties and corrosion behavior of Cu-based nanocomposite developed by flake powder metallurgy and spark plasma sintering process

Akbarpour, M.R.; Mirabad, H. Mousa; Azar, Mojtaba Khalili; Kakaei, Karim; Kim, H.S.

doi:10.1016/j.msea.2020.139395

Cited by 32 publications

(10 citation statements)

References 75 publications

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“…This result is in accordance with the poor cycling performance and thermal stability of the pristine NCM811 cathode. The ZrO 2 coating can operate as a shielding layer between the transition-metal surface and the electrolyte and suppress particle deterioration. ,, Thus, negligible cracks are observed on the surface of both ZrO 2 and composite-coated electrodes (Figure b,c). Moreover, in the composite-coated sample, the presence of rGO nanosheets makes up the coating imperfections and, hence, prohibits harmful side reactions. , …”

Section: Resultsmentioning

confidence: 99%

Enhanced Electrochemical Performance and Thermal Stability of ZrO₂- and rGO–ZrO₂-Coated Li[Ni_0.8Co_0.1Mn_0.1]O₂ Cathode Material for Li-Ion Batteries

Azar

Khollari

Esmaeili

et al. 2020

ACS Appl. Energy Mater.

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LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811) has been considered as a promising cathode for Li-ion batteries (LIBs) due to its high electrochemical capacity and low cost; however, poor cycling stability is one of the main restricting factors in industrial applications of the NCM811 cathode material. Notably, the capacity fading and low structural stability of NCM811 are intensified at elevated temperatures. ZrO 2 -and composite rGO−ZrO 2 -coated NCM811 were fabricated by a facile wet chemical method and evaluated at 25 and 55 °C to overcome these impediments. The ZrO 2 coating provides superior cycling and thermal stability and perfectly protects the cathode active material from deleterious side reactions, and HF attacks by suppressing the direct contact of NCM811 particles and electrolytes. Despite these advantages, the discharge capacity of the ZrO 2 -coated cathode material (166.3, 187.7 mAh g −1 ) is slightly lower than that of the pristine cathode (171.7, 193.0 mAh g −1 ) due to the insulative nature of ZrO 2 NPs, after one cycle at ambient and elevated temperatures. The first cycle discharge capacity increased to 185.9 and 206.7 mAh g −1 at 25 and 55 °C, respectively, with the rGO−ZrO 2 -coated cathode material. The capacity retention reached 92.4 and 83.3%, showing high capacities of 171.8 and 172.3 mAh g −1 at 1C after 100 cycles at 25 and 55 °C, whereas the pristine cathode material exhibited low retention values of 72.4 and 54.5% with discharge capacities of 124.3 and 105.2 mAh g −1 under the same conditions, respectively. The incorporation of rGO into the coating can make up for the ZrO 2 coating imperfection and, at the same time, can enhance the ion/electron conductivity of the electrode by providing a conductive network on the surface of the cathode material. In light of the fact that ZrO 2 -and composite rGO−ZrO 2 -coated NCM811 cathode materials exhibit superior performance; they can pave the way for industrial applications of high-energy-density lithium-ion batteries. KEYWORDS: LiNi 0.8 Co 0.1 Mn 0.1 O 2 , nanocoating, reduced graphene oxide, ZrO 2 , thermal stability, lithium-ion batteries

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Section: Resultsmentioning

confidence: 99%

Enhanced Electrochemical Performance and Thermal Stability of ZrO₂- and rGO–ZrO₂-Coated Li[Ni_0.8Co_0.1Mn_0.1]O₂ Cathode Material for Li-Ion Batteries

Azar

Khollari

Esmaeili

et al. 2020

ACS Appl. Energy Mater.

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“…The 1 and 4 wt % TiO 2 -coated cathodes (Figure S5b and c) show better structural stability compared to the pristine cathode; however, the first sample suffers from inadequate TiO 2 coating and the latter from agglomeration of coating nanoparticles, which causes poor surface coverage. On the other hand, the 2 wt % TiO 2 -coated electrode (Figure S5d) has remained intact and rarely damaged, showing the effectiveness of the TiO 2 coating layer in isolating the active cathode particles from the electrolyte, alleviating the HF attack, and retarding the oxygen release. − …”

Section: Resultsmentioning

confidence: 99%

Electrochemical Performance and Elevated Temperature Properties of the TiO₂-Coated Li[Ni_0.8Co_0.1Mn_0.1]O₂ Cathode Material for High-Safety Li-Ion Batteries

Khollari

Azar

Esmaeili

et al. 2021

ACS Appl. Energy Mater.

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Nowadays, the LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811) cathode material has attracted great research interest due to its high energy density and less usage of costly raw materials. However, the high nickel content of NCM811 brings about an extremely unstable interface between the electrode and electrolyte and therefore inferior cyclic stability. Herein, we have proposed a straightforward method to deliver 1, 2, and 4 wt % of TiO 2 nanoparticles (NPs) on the surface of the NCM811 cathode material and to improve its properties at room and high temperatures. Based on scanning electron microscopy and transmission electron microscopy observations, the coating thickness varies from 10 to 35 nm and the 2 wt % TiO 2 -coated cathode is provided with uniformly distributed NPs that could result in an improved structural stability and electrochemical performance. In detail, at 25 and 55 °C and 1 C, the 2 wt % TiO 2 -coated cathode shows capacity retentions of 90.0 and 80.5% after 100 cycles, higher than those of pristine and coated cathodes. Under a high current rate of 10 C at 25 and 55 °C, the discharge capacities of the 2 wt % TiO 2 -coated cathode were 135.9 and 141.4 mA h g −1 , which are significantly higher than those of the pristine cathode material (128.3 and 89.1 mA h g −1 ). Results of the dissolution test at 55 °C reflect the effectiveness of the TiO 2 coating in maintaining the structural integrity of the cathode material and protecting it from HF attack and deleterious side reactions. Also, the differential scanning calorimetry result proves the enhanced safety after surface modification; the TiO 2 coating shifts the exothermic peak of the electrode from 231.1 to 242.9 °C. Therefore, surface modification with TiO 2 NPs can be proposed as a practical and cost-effective method for the commercial application of the high energy density NCM811 cathode at room and high temperatures. KEYWORDS: LiNi 0.8 Co 0.1 Mn 0.1 O 2 , nanocoating, TiO 2 , safety, cathode, lithium-ion batteries

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“…Micro- and nanometal particles have been widely used in diverse applications, such as interconnections and conductive inks. , In particular, Ag and Cu have been used as sintering materials for sintering interconnections (Figure ) owing to their high electrical and thermal conductivities. , Silver was more widely used in sintering applications at the beginning owing to the characteristics of noble metals. , However, the high cost of Ag materials impedes their commercialization and large-scale applications. Cu-based bonding (sintering) materials feature their high electrical and thermal conductivities at a low cost. , Furthermore, Cu exhibits better anti-ionic migration characteristics than Ag . However, Cu features a thermodynamically favorable copper oxide (passivation layer) formation in ambient environments .…”

Section: Introductionmentioning

confidence: 99%

Copper Sintering Pastes with Various Polar Solvents and Acidic Activators

Lee,

Han,

Kim

et al. 2023

ACS Omega

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Devices in the developing semiconductor market require high density, high integration, and detailed processing. Conventional wire bonding is inappropriate for fine-sized devices, and connected wires can be damaged by heat generation and external physical impact. Soldering is also used in advanced packaging technologies. However, disturbances and overhead joints can occur during bonding. Thus, sintering has been extensively utilized to overcome these drawbacks. Sintering pastes are pressurized and bonded, resulting in stable bonding during sintering. In this study, the composition of the Cu sintering material was examined using diverse additives and solvents. We manufactured sintering materials comprising Cu (1 μm), a solvent [methanol (MeOH), ethanol (EtOH), or ethylene glycol (EG)] and an acidic additive (benzoic acid, phthalic acid, or hexanoic acid). After the sintering process, the mechanical and electrical characteristics were compared to determine the optimal composition and bonding conditions. The optimum ratios between the acid and solvent were 4:6 (MeOH and EtOH) and 2:8 (EG) due to the high viscosity and effective long-term storage. All samples using EtOH as the solvent exhibited the highest sintering performances. The aromatic and carboxylic groups substantially improved the sintering performance and increased the electrical conductivity. Based on the O1s/Cu2p ratio (2.23%), the best sintering composition was EtOH/PA, which showed the highest electrical conductivity (ca. 104 S/m) and strength (34.0 MPa). The sintering process using various additives and solvents can be helpful to determine the sintering conditions while maintaining the electrical properties.

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Synergistic role of carbon nanotube and SiCn reinforcements on mechanical properties and corrosion behavior of Cu-based nanocomposite developed by flake powder metallurgy and spark plasma sintering process

Cited by 32 publications

References 75 publications

Enhanced Electrochemical Performance and Thermal Stability of ZrO₂- and rGO–ZrO₂-Coated Li[Ni_0.8Co_0.1Mn_0.1]O₂ Cathode Material for Li-Ion Batteries

Enhanced Electrochemical Performance and Thermal Stability of ZrO₂- and rGO–ZrO₂-Coated Li[Ni_0.8Co_0.1Mn_0.1]O₂ Cathode Material for Li-Ion Batteries

Electrochemical Performance and Elevated Temperature Properties of the TiO₂-Coated Li[Ni_0.8Co_0.1Mn_0.1]O₂ Cathode Material for High-Safety Li-Ion Batteries

Copper Sintering Pastes with Various Polar Solvents and Acidic Activators

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Synergistic role of carbon nanotube and SiCn reinforcements on mechanical properties and corrosion behavior of Cu-based nanocomposite developed by flake powder metallurgy and spark plasma sintering process

Cited by 32 publications

References 75 publications

Enhanced Electrochemical Performance and Thermal Stability of ZrO2- and rGO–ZrO2-Coated Li[Ni0.8Co0.1Mn0.1]O2 Cathode Material for Li-Ion Batteries

Enhanced Electrochemical Performance and Thermal Stability of ZrO2- and rGO–ZrO2-Coated Li[Ni0.8Co0.1Mn0.1]O2 Cathode Material for Li-Ion Batteries

Electrochemical Performance and Elevated Temperature Properties of the TiO2-Coated Li[Ni0.8Co0.1Mn0.1]O2 Cathode Material for High-Safety Li-Ion Batteries

Copper Sintering Pastes with Various Polar Solvents and Acidic Activators

Contact Info

Product

Resources

About

Enhanced Electrochemical Performance and Thermal Stability of ZrO₂- and rGO–ZrO₂-Coated Li[Ni_0.8Co_0.1Mn_0.1]O₂ Cathode Material for Li-Ion Batteries

Enhanced Electrochemical Performance and Thermal Stability of ZrO₂- and rGO–ZrO₂-Coated Li[Ni_0.8Co_0.1Mn_0.1]O₂ Cathode Material for Li-Ion Batteries

Electrochemical Performance and Elevated Temperature Properties of the TiO₂-Coated Li[Ni_0.8Co_0.1Mn_0.1]O₂ Cathode Material for High-Safety Li-Ion Batteries