Lithiation Induced Stress Concentration for 3D Metal Scaffold Structured Silicon Anodes

Zheng, Zhuoyuan; Chen, Bo; Fritz, Nathan Joseph; Gurumukhi, Yashraj; Cook, John B.; Ateş, Mehmet Nurullah; Miljkovic, Nenad; Wang, Pingfeng

doi:10.1149/2.1031910jes

Cited by 18 publications

(9 citation statements)

References 32 publications

(41 reference statements)

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“…In addition to the layer thickness of active material, these include the thickness of the conducting scaffold, the pore radius, and the curvature within the scaffold (concave vs convex regions). 75 Rate advantages of the 3DOM architecture were also demonstrated in full cells, for example, one assembled with 3DOM V 2 O 5 as the cathode and electrochemically precharged 3DOM Co 3 O 4 as the anode. 76 This cell could be charged at high rates (C-rate up to 8C, where 1C = 145 mA h g −1 ) and discharged at lower rates (2C), providing a reversible capacity of ∼150 mA h g −1 with a reasonably small capacity decay during 175 cycles.…”

Section: ■ Nanostructured Featuresmentioning

confidence: 98%

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Achieving Functionality and Multifunctionality through Bulk and Interfacial Structuring of Colloidal-Crystal-Templated Materials

Stein

2023

Langmuir

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Over the past 25 years, the field of colloidal crystal templating of inverse opal or three-dimensionally ordered macroporous (3DOM) structures has made tremendous progress. The degree of structural control over multiple length scales, understanding of mechanical properties, and complexity of systems in which 3DOM materials are a component have increased substantially. In addition, we are now seeing applications of 3DOM materials that make use of multiple features of their architecture at the same time. This Feature Article focuses on the different properties of 3DOM materials that provide functionality, including a relatively large surface area, the interconnectedness of the pores and the resulting good accessibility of the internal surface, the nanostructured features of the walls, the structural hierarchy and periodicity, well-defined surface roughness, and relative mechanical robustness at low density. It provides representative examples that illustrate the properties of interest related to applications including energy storage and conversion systems, sensors, catalysts, sorbents, photonics, actuators, and biomedical materials or devices.

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Section: ■ Nanostructured Featuresmentioning

confidence: 98%

“…However, the stress concentration profile depends on multiple other parameters, many of which can be controlled. In addition to the layer thickness of active material, these include the thickness of the conducting scaffold, the pore radius, and the curvature within the scaffold (concave vs convex regions) …”

Section: Nanostructured Featuresmentioning

confidence: 99%

Achieving Functionality and Multifunctionality through Bulk and Interfacial Structuring of Colloidal-Crystal-Templated Materials

Stein

2023

Langmuir

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“…Three-dimensional battery architectures enhance the power and energy capabilities of LIBs by providing short Li-ion diffusion pathways . Inverted opal structures for cathode and anode electrodes have also been receiving great attention due to reduced tortuosity. − To maximize the power characteristics of a LIB, Yet-Ming Chiang from MIT and his colleagues reported a novel battery electrode design with dual scale porosity to allow extremely fast discharge capabilities . Similarly, Dang et al studied Gt electrode architecture by lowering the tortuosity of the electrode using the freeze-drying method which improved the rate performance of the electrode .…”

Section: Introductionmentioning

confidence: 99%

Controlling the Crystallographic Orientation of Graphite Electrodes for Fast-Charging Li-Ion Batteries

Bayındır

Sohel

Erol

et al. 2021

ACS Appl. Mater. Interfaces

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In this study, we report a new design paradigm for an electrode preparation method that drastically improves the fast-charging capabilities of a graphite (Gt) anode by controlling the crystallographic orientation. The crystallographic orientation of the Gt electrode is achieved under a dynamic magnetic field using commercially available neodymium magnets. When the slurry of the Gt electrode is tape casted using the conventional method with no magnetic field, the crystallographic orientation is dominated with (002) planes along with other random planes. However, once the slurry of the Gt electrode is casted and dried under a magnetic field, the Gt particles tend to orient themselves along the (100), (101), and (110) planes which are all aligned vertically to the current collector. This striking difference allows the oriented Gt electrode to reach 80% state of the charge in only 50 min at 1C charge rate, whereas the randomly distributed Gt electrode reaches 80% state of the charge in 138 min at 1C charge rate using a constant current−constant voltage charging protocol. The outstanding electrochemical performance of the oriented Gt electrodes was characterized by X-ray diffraction, scanning electron microscopy, Raman spectroscopy, electrochemical cycling, and electrochemical impedance spectroscopy techniques.

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“…Numerical simulation models like FE analysis have been widely adopted in the LIB research field, [31][32][33][34][35][36][37][38][39][40] which are built upon specific physics of failure and can be used to investigate the electrochemicalthermal and electrochemical-mechanical couplings, as well as the capacity degradation failure mechanisms, etc. These models can precisely estimate the electrochemical reactions, Li diffusion, thermal response, and cycle dependent structural changes and stresses and provide valuable insights in understanding the characterizations of sophisticated electrode microstructures, which might be otherwise difficult to study experimentally.…”

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confidence: 99%

Uncertainty Quantification Analysis on Mechanical Properties of the Structured Silicon Anode via Surrogate Models

Zheng

Wang

2021

J. Electrochem. Soc.

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Silicon anode is the most promising candidate for next generation lithium ion batteries. A major drawback limiting its application is the significant volume change during lithiation-delithiation process, which may cause material pulverization and capacity degradation. A novel 3D bi-continuous nanoporous structured Si anode, consisting of porous metal scaffolds and thin Si coating layers, was proven to be an effective method to tackle this issue; however, uncertainty and non-uniformity, inherited from the fabrication process, will be inevitably introduced as important considerations for the performances of the Si anode. In this paper, uncertainty quantification (UQ) analysis is performed on the structured Si anode system to evaluate the influences of various design variables on its performances and to find the design optimization strategy. The biggest hurdle in the UQ study is the computational cost; to mitigate this challenge, a Gaussian Process based surrogate model is constructed using finite element simulation results as training data. It is found that the performances of the anode are rather sensitive to the geometric parameters, i.e. scaffold non-uniformity and Si layer thickness, whereas the mechanical properties of the materials are relatively less important. Furthermore, the optimal design is proposed to minimize the stress concentration in the Si anode.

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Lithiation Induced Stress Concentration for 3D Metal Scaffold Structured Silicon Anodes

Cited by 18 publications

References 32 publications

Achieving Functionality and Multifunctionality through Bulk and Interfacial Structuring of Colloidal-Crystal-Templated Materials

Achieving Functionality and Multifunctionality through Bulk and Interfacial Structuring of Colloidal-Crystal-Templated Materials

Controlling the Crystallographic Orientation of Graphite Electrodes for Fast-Charging Li-Ion Batteries

Uncertainty Quantification Analysis on Mechanical Properties of the Structured Silicon Anode via Surrogate Models

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