Improvement of the cyclability of Li-ion battery cathode using a chemical-modified current collector

Loghavi, M.; Askari, Mohsen; Babaiee, Mohsen; Ghasemi, Abdolmajid

doi:10.1016/j.jelechem.2019.04.037

Cited by 21 publications

(6 citation statements)

References 14 publications

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“…. The loop at high frequency (~1 kHz) describes the response of various electrochemical processes; it generally characterizes the resistance of the SEI film on the graphite anode 10,[30][31][32] . However, for the NMC cathodes, as surface films are much thinner, their resistance is not predominant in this frequency range.…”

Section: Impedance Buildupmentioning

confidence: 99%

“…In fact, as electrochemical processes are dependent on the temperature contrary to electronic phenomena, impedance measurements at 0°C and 25°C have been carried out to confirm that the semi-circle described by the resistance R2 corresponds to the resistance of surface film for the graphite anode, and contact resistance for the NMC cathode. The high frequency loop is rather assigned to the electronic resistance of the electrodes (particle-toparticle and particle-to-collector) 10,30,33,34 . This semicircle is modeled by a resistance R2 in parallel with a constant phase element Q2.…”

Section: Impedance Buildupmentioning

confidence: 99%

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Performance and ageing behavior of water-processed LiNi0.5Mn0.3Co0.2O2/Graphite lithium-ion cells

Bichon

Sotta

Vito

et al. 2021

Journal of Power Sources

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In this study, water-processed LiNi0.5Mn0.3Co0.2O2 cathodes (NMC532) are investigated. Notably, corrosion of the aluminum current collector occurring in aqueous processing owing to the alkalinity of the NMC slurry is avoided through the addition of phosphoric acid which buffers the slurry pH, or by using a carbon-coated collector. The impact of small amounts of phosphoric acid on the electrochemical performance is evaluated in half cells, and the best formulations are selected to perform further ageing tests in pouch cells. In particular, post mortem analyses such as electrochemical impedance spectroscopy and X-ray photoelectron spectroscopy are conducted on

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Section: Impedance Buildupmentioning

confidence: 99%

Section: Impedance Buildupmentioning

confidence: 99%

Performance and ageing behavior of water-processed LiNi0.5Mn0.3Co0.2O2/Graphite lithium-ion cells

Bichon

Sotta

Vito

et al. 2021

Journal of Power Sources

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“…Three semicircles have often been reported in literature when the impedance spectra were recorded at higher state of charge. [74][75][76][77][78] The associated resistances have been mostly assigned, from high to low frequencies, to the surface film impedance (R f ), the electronic properties of the active material or a combination of charge transfer resistance at the metallic lithium/electrolyte interface along with the electronic conductivity of the active material (R * ) and the charge transfer impedance at the cathode/electrolyte interface (R ct ). In contrast, three semicircles are hard to discern for the cells with the NMPbased electrodes.…”

Section: Lialomentioning

confidence: 99%

Implications of Aqueous Processing for High Energy Density Cathode Materials: Part I. Ni-Rich Layered Oxides

Hofmann

Kapuschinski

Guntow

et al. 2020

J. Electrochem. Soc.

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Combining the use of nickel-rich layered oxide cathode materials with the implementation of aqueous electrode processing can pave the way to cost-reduced and environmentally friendly electrodes and simultaneously increase the energy density of cells. Herein, LiNi0.33Co0.33Mn0.33O2 (NCM111), LiNi0.6Co0.2Mn0.2O2 (NCM622), LiNi0.8Co0.1Mn0.1O2 (NCM811) and LiNi0.8Co0.15Al0.05O2 (NCA) were evaluated in terms of their response to aqueous processing under the same conditions to facilitate a direct comparison. The results illustrate that mainly nickel driven processes lead to lithium leaching which is combined with the increase of the pH value in the alkaline region. For NCA an additional aluminum-involving lithium leaching mechanism is assumed, which could explain the highest amount of leached lithium and the additional detection of aluminum. Electrochemical tests show a reduced capacity for cells containing water-based electrodes compared to reference cells for the NCM-type materials which increases during the first cycles indicating a reversible Li+/H+-exchange mechanism. In contrast, the NCA cells were completely electrochemically inactive making NCA the most water sensitive material tested in this report. By comparing the cycling performance of cells containing aqueous processed electrodes, a more pronounced capacity fade for nickel-rich cathode materials as compared to their reference cells can be observed.

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“…Significant improvements to battery performance by surface/interface modification were yet demonstrated by calendering [ 2,3 ] or laser structuring [ 4–8 ] of electrodes, lamination of electrodes and separator, [ 9 ] or by enlargement of the current collector micro‐surface. [ 10–14 ]…”

Section: Introductionmentioning

confidence: 99%

“…Significant improvements to battery performance by surface/interface modification were yet demonstrated by calendering [2,3] or laser structuring [4][5][6][7][8] of electrodes, lamination of electrodes and separator, [9] or by enlargement of the current collector micro-surface. [10][11][12][13][14] Plasma-processes are well-known as a helpful tool in the field of LIBs. [15] Plasma-processes enable the production of nanosized AM particles, [16][17][18] carbon-based conductive AM coatings, [19] specialized 3D architectures for electrode nanowires, [20,21]…”

mentioning

confidence: 99%

Improving Wetting Behavior and C‐Rate Capability of Lithium‐Ion Batteries by Plasma Activation

et al. 2022

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Climate change is part of today's most complex global challenges. Social efforts to achieve sustainable and CO 2 -neutral ways to provide mobility as well as for electrical energy production, induce ambitious challenges to energy storage. In the field of rechargeable batteries, the lithium-ion-battery (LIB) is today's most promising approach, to match all energy storage requirements of electric vehicles (mobile energy storage) as well as for grid stabilization (stationary energy storage). Since their first commercialization by Sanyo, Sony, and Matsuhita in the early 1990ies, [1] LIBs enabled a wide range of portable electronics. Nevertheless, LIBs still require further improvements in terms of energy density, power density, lifetime, safety, and cost reduction, which presently drives enormous research efforts to focus on these topics. Typical research fields cover the advancement of active and inactive electrode materials, separators, electrolytes, as well as manufacturing techniques. Simulation approaches for characterization of fundamental physical and chemical processes during LIB operation highlighted surfaces and interfaces to have a substantial influence on LIB kinetics, in terms of electrolyte mass transport, charge-transfer (CT) reactions at anodic and cathodic active material (AM) particles, and electronic resistance at the electrode--current collector interface. Significant improvements to battery performance by surface/interface modification were yet demonstrated by calendering [2,3] or laser structuring [4][5][6][7][8] of electrodes, lamination of electrodes and separator, [9] or by enlargement of the current collector micro-surface. [10][11][12][13][14] Plasma-processes are well-known as a helpful tool in the field of LIBs. [15] Plasma-processes enable the production of nanosized AM particles, [16][17][18] carbon-based conductive AM coatings, [19] specialized 3D architectures for electrode nanowires, [20,21]

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Improvement of the cyclability of Li-ion battery cathode using a chemical-modified current collector

Cited by 21 publications

References 14 publications

Performance and ageing behavior of water-processed LiNi0.5Mn0.3Co0.2O2/Graphite lithium-ion cells

Performance and ageing behavior of water-processed LiNi0.5Mn0.3Co0.2O2/Graphite lithium-ion cells

Implications of Aqueous Processing for High Energy Density Cathode Materials: Part I. Ni-Rich Layered Oxides

Improving Wetting Behavior and C‐Rate Capability of Lithium‐Ion Batteries by Plasma Activation

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