Foldable batteries: from materials to devices

Jeong, Insu; Han, Dong‐Yeob; Hwang, Jongha; Song, Woo‐Jin; Park, Soo‐Jin

doi:10.1039/d1na00892g

Cited by 10 publications

(5 citation statements)

References 200 publications

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“…Consequently, the 3D-printed Znion hybrid supercapacitor exhibited an areal energy density of 1.514 mWh•cm -2 with prolonged cyclability (capacitance retention of 100% over 10,000 cycles). Similarly, another study reported 3Dprinted Na-ion hybrid capacitors consisting of a nitrogen-doped Ti 3 C 2 T x (N-Ti 3 C 2 T x ) anode and AC positive electrode [23]. The porous N-Ti 3 C 2 T x enabled fast electron/ion pathways and electrochemical reaction kinetics, resulting in superior Na-ion storage behavior.…”

Section: Additive Manufacturingmentioning

confidence: 95%

Cell architecture designs towards high-energy-density microscale energy storage devices

Lee,

Lee

2024

Nano Research Energy

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The rapid growth of miniaturized electronics has led to an urgent demand for microscale energy storage devices (MESDs) to sustainably power the micro electronic devices. However, most MESDs reported to date have suffered from the limited energy densities and shape versatility compared to conventional large-scale counterparts because of the architectural constraints inherent in microfabrication-based cell manufacturing and cell dimension/structure. This review addresses the cell architecture design for MESDs that can achieve both miniaturization and high energy density. We provide a comprehensive overview of five types of cell architectures of MESDs and their fabrication techniques. In addition, to enable practical applications of MESDs, several cell design approaches are presented with the aim of minimizing the inactive parts of the cell and maximizing the performance metrics of MESDs. Finally, we discuss development direction and outlook of MESDs with a focus on materials chemistry, energy-dense electrochemical systems, and cell performance normalization, which will help to expand their applications and manufacturing scalability.

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Section: Additive Manufacturingmentioning

confidence: 95%

Cell architecture designs towards high-energy-density microscale energy storage devices

Lee,

Lee

2024

Nano Research Energy

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“…Recently, design strategies inspired by paper artwork, named kirigami and origami, have been extensively applied to a wide range of electronics, encompassing antennas [ 78 ], image sensors [ 79 , 80 ], battery [ 81 , 82 ], and bioelectronics [ 83 , 84 ]. A kirigami-based structure involves cutting the edges or central parts of devices [ 85 , 86 ], while an origami-based structure involves the controlled folding of devices into desired patterns [ 87 , 88 , 89 ].…”

Section: Structural Approaches For the Fabrication Of Stretchable Ledsmentioning

confidence: 99%

Structural and Material-Based Approaches for the Fabrication of Stretchable Light-Emitting Diodes

Park,

Kim

2023

Micromachines

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Stretchable displays, capable of freely transforming their shapes, have received significant attention as alternatives to conventional rigid displays, and they are anticipated to provide new opportunities in various human-friendly electronics applications. As a core component of stretchable displays, high-performance stretchable light-emitting diodes (LEDs) have recently emerged. The approaches to fabricate stretchable LEDs are broadly categorized into two groups, namely “structural” and “material-based” approaches, based on the mechanisms to tolerate strain. While structural approaches rely on specially designed geometries to dissipate applied strain, material-based approaches mainly focus on replacing conventional rigid components of LEDs to soft and stretchable materials. Here, we review the latest studies on the fabrication of stretchable LEDs, which is accomplished through these distinctive strategies. First, we introduce representative device designs for efficient strain distribution, encompassing island-bridge structures, wavy buckling, and kirigami-/origami-based structures. For the material-based approaches, we discuss the latest studies for intrinsically stretchable (is-) electronic/optoelectronic materials, including the formation of conductive nanocomposite and polymeric blending with various additives. The review also provides examples of is-LEDs, focusing on their luminous performance and stretchability. We conclude this review with a brief outlook on future technologies.

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“…In recent years, the demand for flexible lithium-ion batteries (FLIBs) has grown with the increasing popularity of flexible devices such as foldable smartphones and wearable accessories (Lee et al, 2013;Chen et al, 2021;Jeong et al, 2022). This trend is primarily driven by the development of foldable or flexible technologies, including cell phones, watches, and Internet of Things (IoT)-enabled electronics (Mokhtari et al, 2020;Woo et al, 2020;Lee et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Design parameters affecting mechanical failure and electrochemical degradation of ultrathin Li-ion pouch cells under repeated flexing

Kim,

Chan

2024

Front. Batter. Electrochem.

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Understanding mechanical failure modes of Li-ion battery electrodes of varying sizes and capacities is crucially important for the development of mechanically robust and high energy density flexible lithium-ion batteries (FLIBs). Three types of pouch cells (nominal capacities of 15, 25, and 50 mAh) were examined to understand how various design features used in the cells affected their mechanical failure modes and electrochemical performance after repeated introduction of compression and tension during bending. Postmortem microstructure analysis was carried out to identify the impacts of repeated flexing; several failure modes such as crack propagation, particle detachment, composite delamination, separator damage, electrode tears, and micro-short circuits were observed. We find that the observed mechanical failure modes are mainly dependent on the: 1) size and shape of the electrode composite materials, 2) configuration of the components within the cell (e.g., method of electrode folding, location of welded tabs), and 3) orientation of the long axis of the cell with respect to the bending axis. It was observed that the discharge capacity for all cell types studied herein was only slightly decreased (∼6–7% at 2C-rate) even after 3,000 repeated bends at a 25 mm radius of curvature provided if the bending axis is aligned to the long dimension of the cell. The results of this study provide valuable information on possible failure modes in Li-ion battery electrodes subjected to repeated flexing and how they can be mitigated to improve the dependability of practical pouch cells for FLIBs.

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Foldable batteries: from materials to devices

Abstract: In this review, we summarize the recent progress in developing materials and system designs for foldable batteries.

Cited by 10 publications

References 200 publications

Cell architecture designs towards high-energy-density microscale energy storage devices

Cell architecture designs towards high-energy-density microscale energy storage devices

Structural and Material-Based Approaches for the Fabrication of Stretchable Light-Emitting Diodes

Design parameters affecting mechanical failure and electrochemical degradation of ultrathin Li-ion pouch cells under repeated flexing

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