Induced nanoscale roughness of current collectors enhances lithium ion battery performances

Chen, Jimmy Ching-Ming; Yang, J.; Cheng, Mark Ming Cheng

doi:10.1016/j.jpowsour.2019.05.026

Cited by 16 publications

(6 citation statements)

References 39 publications

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“…Chen et al [ 42 ] showed that a rough current collector after chemical corrosion can improve the electrochemical performance of Li‐ion batteries. This section discusses the effect of the surface roughness of the current collector on the contact between the active particles and current collector.…”

Section: Resultsmentioning

confidence: 99%

Modeling Contact Behavior of Multiparticles and Particle–Current Collector Contact in Porous Electrode

et al. 2022

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There are various component contacts in porous electrodes, such as the direct contact between the active particles and the particle–current collector, during electrode manufacturing and lithium‐ion battery electrochemical cycles. Herein, an electrochemical–mechanical representative volume element model is developed to study the contact behavior of porous electrodes. For the direct contact behavior of multiple particles, stronger battery constraints and larger size differences enhance the reduction in Li‐ion concentration in the contact area of the active particles in the porous electrode and the contact stress in the porous electrode particles. For the contact between the active particles and current collector, the decrease in the elastic modulus of the current collector slightly increases the contact radius and significantly reduces the contact stress. By comparing the contact area and contact stress of the smooth and rough current collectors, the latter has a smaller contact area and larger contact stress when in contact with active particles. These findings provide insights into designing Li‐ion batteries from the perspective of contact stress to minimize the mechanical failure of porous electrodes.

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Section: Resultsmentioning

confidence: 99%

Modeling Contact Behavior of Multiparticles and Particle–Current Collector Contact in Porous Electrode

et al. 2022

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“…Coating graphene on the current collector is a well-known approach taken in modifications to the current collector interface. Graphene is a two-dimensional carbon material with excellent features that include good electrical conductivity, high mechanical strength, and high flexibility . It has been reported that a graphene film deposited on a Cu current collector can reduce polarization and improve electron transfer efficiency.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, when a graphene-coated Cu current collector is applied to a graphite anode, the adhesion is enhanced as a consequence of the van der Waals force and Coulombic interaction between the components . In addition to this, alterations to the surface roughness of the current collector may be another factor that influences the interface by providing improved structural stability …”

Section: Introductionmentioning

confidence: 99%

“…Graphene is a two-dimensional carbon material with excellent features that include good electrical conductivity, high mechanical strength, and high flexibility. 28 It has been reported that a graphene film deposited on a Cu current collector can reduce polarization and improve electron transfer efficiency. Moreover, when a graphene-coated Cu current collector is applied to a graphite anode, the adhesion is enhanced as a consequence of the van der Waals force and Coulombic interaction between the components.…”

Section: ■ Introductionmentioning

confidence: 99%

“…24 In addition to this, alterations to the surface roughness of the current collector may be another factor that influences the interface by providing improved structural stability. 28 Here, we significantly enhanced the performance of a solidstate battery by modifying the surface structure of the current collector. We used graphene growth to form a wrinkled Cu structure for use as a current collector for the anode, which was prepared by using chemical vapor deposition (CVD) graphene-growth synthesis.…”

Section: ■ Introductionmentioning

confidence: 99%

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Nanoscale Wrinkled Cu as a Current Collector for High-Loading Graphite Anode in Solid-State Lithium Batteries

Kim

Chae

et al. 2021

ACS Appl. Mater. Interfaces

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Solid-state lithium batteries have been intensively studied as part of research activities to develop energy storage systems with high safety and stability characteristics. Despite the advantages of solid-state lithium batteries, their application is currently limited by poor reversible capacity arising from their high resistance. In this study, we significantly improve the reversible capacity of solid-state lithium batteries by lowering the resistance through the introduction of a graphene and wrinkle structure on the surface of the copper (Cu) current collector. This is achieved through a process of chemical vapor deposition (CVD) facilitating graphene-growth synthesis. The modified graphene/wrinkled Cu current collector exhibits a periodic wrinkled pattern 420 nm in width and 22 nm in depth, and we apply it to a graphite composite electrode to obtain an improved areal loading average value of ∼2.5 mg cm–2. The surface-modified Cu current collector is associated with a significant increase in discharge capacity of 347 mAh g–1 at 0.2 C when used with a solid polymer electrolyte. Peel test results show that the observed enhancement is due to the improved strength of adhesion occurring between the graphite composite anode and the Cu current collector, which is attributed to mechanical interlocking. The surface-modified Cu current collector structure effectively reduces resistance by improving adhesion, which subsequently improves the performance of the solid-state lithium batteries. Our study can provide perspective and emphasize the importance of electrode design in achieving enhancements in battery performance.

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Enhancing the Capacity and Cycling Performance of Lithium Ion Batteries Through Perforated Current Collectors

Zou,

Nie,

et al. 2024

Acta Mech. Solida Sin.

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Induced nanoscale roughness of current collectors enhances lithium ion battery performances

Cited by 16 publications

References 39 publications

Modeling Contact Behavior of Multiparticles and Particle–Current Collector Contact in Porous Electrode

Modeling Contact Behavior of Multiparticles and Particle–Current Collector Contact in Porous Electrode

Nanoscale Wrinkled Cu as a Current Collector for High-Loading Graphite Anode in Solid-State Lithium Batteries

Enhancing the Capacity and Cycling Performance of Lithium Ion Batteries Through Perforated Current Collectors

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