Crocodile skin inspired rigid-supple integrated flexible lithium ion batteries with high energy density and bidirectional deformability

Liu, Guanzhong; Zhang, Xingyu; Bao, Yinhua; Lu, Bo; Song, Yicheng; Qiao, Yu; Guo, Xu-Feng; Ao, Shengqi; Zhang, Junqian; Fang, Daining

doi:10.1016/j.ensm.2022.01.062

Cited by 30 publications

(35 citation statements)

References 46 publications

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“…The HE‐CMFSGS electrode exhibits the best discharge capabilities and the highest energy densities at all current densities (Figure 2f,g). [ 25 ] Detailly, it delivers reversible discharge capacities of 580.6, 578.8, 551.6, 533.9, 504.1, 477.4, and 459.2 mA h g –1 at increasing current densities from 0.1, 0.2, 0.5, 1.0, 2.0, 5.0 to 10.0 A g –1 , respectively (Figure 2f). Such superior rate capability indicates the outstanding kinetics movement of sodium ions in the high‐entropy configuration.…”

Section: Resultsmentioning

confidence: 99%

Entropy‐Change Driven Highly Reversible Sodium Storage for Conversion‐Type Sulfide

Zhao

Chen

Sun

et al. 2022

Adv Funct Materials

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Transition metal sulfides (TMSs) are reported to be efficient sodium storage anode materials due to their rich redox chemistry and good electronic conductivity features. However, the issues of poor reaction reversibility and cyclability, caused by structure degradation and volume expansion during repeated (de)sodiation processes, have far limited the applicability of these materials. Herein, a high-entropy configuration strategy is reported for Cu 4 MnFeSnGeS 8 anodes for advanced sodium ion batteries. In this high-entropy material, the homogeneously dispersed cations can effectively suppress the continuous coarseness of Sn nanoparticles and maintain valid interface contact between M 0 and Na 2 S, thus achieving highly reversible sodium storage. Moreover, the highly reversible crystalline-phase transformation of high-entropy Cu 4 MnFeSnGeS 8 and highly inherent mechanical stability can effectively relieve the persistently accumulated mechanical stress, thus restraining continuous breakage of the solid electrolyte interphase film and pulverization of the electrode, and improving cycling stability. Furthermore, when coupled with a Na 3 V 2 (PO 4 ) 3 cathode, the full cell shows a high energy density (264 Wh kg -1 ), which makes the high-entropy-stabilized sulfide a promising anode candidate for SIBs.

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Section: Resultsmentioning

confidence: 99%

Entropy‐Change Driven Highly Reversible Sodium Storage for Conversion‐Type Sulfide

Zhao

Chen

Sun

et al. 2022

Adv Funct Materials

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“…Even if the spiral degree was 360°(Figures 5f), the maximum stress on the cell was still lower than the yield strength of the current collectors. This result indicated that the existence of the battery 11 wave-like, 12 snake-origami, 13 joint inspired, 14 accordion-like, 15 crocodile skin inspired, 18 zigzag-like, 19 3D interlocking 26 ). groove effectively buffered the overall strain and thus inhibited the damage/fracture of the cell components caused by the stress: in other words, the mechanical failure of the battery was prevented.…”

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confidence: 84%

“…Lithium-ion batteries (LIBs), with the advantages of stable cycle life, no memory effect, etc., are currently some of the most commercially mature and widely used power sources. − To realize the functionalization of LIBs, considerable efforts have been made to develop shape transformations, including bendable, foldable, stretchable, etc. − However, only by realizing all the deformation modes caused by fundamental stresses can any desired special-shaped structures be obtained, thus meeting the various requirements of complex device design in the future. − Spiral deformation (SD), as one of the most basic mechanical deformation modes of materials, arises from shear/torsional stress. Many movements of living bodies in nature, such as the circling of snakes, the walking of centipedes, etc., are all caused by shear/torsional stress to achieve spiral motions.…”

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confidence: 99%

“…(e) Single-step-time full-cell voltage curves of the FLIB under different GCD cycles. (f) Capacity retention and in situ mechanical loading cycles of the reported full-cell-scale flexible batteries in comparison with DNA-structure-inspired spiral FLIBs (spine-like, wave-like, snake-origami, joint inspired, accordion-like, crocodile skin inspired, zigzag-like, 3D interlocking).…”

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confidence: 99%

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DNA Helix Structure Inspired Flexible Lithium-Ion Batteries with High Spiral Deformability and Long-Lived Cyclic Stability

et al. 2022

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With the development of flexible devices, it is necessary to design high-performance power supplies with superior flexibility, durability, safety, etc., to ensure that they can be deformed with the device while retaining their electrochemical functions. Herein, we have designed a flexible lithium-ion battery inspired by the DNA helix structure. The battery structure is mainly composed of multiple thick energy stacks for energy storage and some grooves for stress buffers, which realized the spiral deformation of batteries. According to the results, the batteries exhibit less than 3% capacity degradation even after more than 31000 times of in situ dynamic mechanical loadings. Moreover, the mechanism of the battery with spiral deformability is further revealed. It is anticipated that this bioinspired design strategy could create unique opportunities for the commercialization of flexible batteries and fill the current gap in realizing battery-specific deformations to meet various requirements for future complex device designs.

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“…And a work from Liu et al. [ 31 ] claimed the excellent electrochemical performance of rectangular FLIBs with a “rigid‐flexible integration” scheme. A common concern in all these reports is how to use the periodic variation of thickness to realize complex and diverse shape deformations while maintaining electrochemical performance.…”

Section: Introductionmentioning

confidence: 99%

Kirigami‐Inspired Flexible Lithium‐Ion Batteries via Transformation of Concentrated Stress into Segmented Strain

Meng

Zhu

Kang

et al. 2022

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Emerging directions in the growing wearable electronics market have spurred the development of flexible energy storage systems that require deformability while maintaining electrochemical performance. However, the traditional fabrication approaches of lithium‐ion batteries (LIBs) are challenging to withstand long‐cycle bending alternating loads due to the stress concentration caused by the nonuniformity of the actual deformation. Herein, inspired by kirigami, a segmented deformation design of full‐cell scale thin‐type flexible lithium‐ion batteries (FLIBs) with large‐scale manufacturing characteristics via the current collector's mechanical blanking process is reported. This strategy allows the battery's elliptical deformation of the actual state to be transformed into the circular strain of the ideal configuration, thereby dispersing the stress concentration on the top of the battery. According to the results, the designed battery maintains >95% capacity after >20 000 harsh in situ dynamic tests. In addition, finite element analysis further reveals the mechanism that the segmented deformation strategy bears the mechanical stress. This work can enlighten the rational design and customization of electrode patterns for high compatibility with various devices, thereby providing potential opportunities for the application of FLIBs.

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Crocodile skin inspired rigid-supple integrated flexible lithium ion batteries with high energy density and bidirectional deformability

Cited by 30 publications

References 46 publications

Entropy‐Change Driven Highly Reversible Sodium Storage for Conversion‐Type Sulfide

Entropy‐Change Driven Highly Reversible Sodium Storage for Conversion‐Type Sulfide

DNA Helix Structure Inspired Flexible Lithium-Ion Batteries with High Spiral Deformability and Long-Lived Cyclic Stability

Kirigami‐Inspired Flexible Lithium‐Ion Batteries via Transformation of Concentrated Stress into Segmented Strain

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