Hair-based flexible knittable supercapacitor with wide operating voltage and ultra-high rate capability

Liu, Wenwen; Feng, Kun; Zhang, Yining; Yu, Tongwen; Han, Lei; Lui, Gregory; Li, Matthew; Chiu, Gordon; Fung, P. K.; Yu, Aiping

doi:10.1016/j.nanoen.2017.03.022

Cited by 65 publications

(39 citation statements)

References 49 publications

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“…The macroscopic mechanical properties of hair and the as‐prepared hybrid macrofibers are compared and studied by using the hair and macrofibers to lift heavy objects (Figure d–f). Although human hair fibers (with a typical diameter of 100 µm) exhibit excellent mechanical properties, it cannot bear a 500 g weight. However, our hybrid macrofiber (with a diameter of 100 µm) can bear at least a 500 g weight without any fracture.…”

Section: Resultsmentioning

confidence: 99%

Biomimetic Mineralized Organic–Inorganic Hybrid Macrofiber with Spider Silk‐Like Supertoughness

Zhao

et al. 2019

Adv Funct Materials

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Spider silk fibers (SSF) have a hierarchical structure composed of proteins with highly repetitive sequences and biomineralization is sophisticated in hierarchical organic-inorganic constructions. By using inorganic hydroxyapatite (HAP) and organic polyvinyl alcohol (PVA) to simulate the rigid crystalline and flexible amorphous protein blocks of SSF, respectively, biomimetic mineralization is herein attempted for the large-scale preparation of SSF-like macrofibers with a hierarchical ordered structure, a superhigh tensile strength of 949 ± 38 MPa, a specific toughness of 296 ± 12 J g −1 , and a stretch ability of 80.6%. The hybrid macrofibers consist of microfibers, and their outstanding performance (e.g., extreme tolerance to temperatures ranging from −196 to 80 °C and superior ability to inhibit the transverse growth of cracks) is attributed to the hierarchical arrangement as well as the organic-inorganic integrated structure within the oriented mineralized polymer chains. The biomineralization-inspired technique provides a promising tactic that can be used to synthesize functional organicinorganic fibers that are structurally complex and, furthermore, industrially manufacture SSF-like artificial fibers with a supertoughness.

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Section: Resultsmentioning

confidence: 99%

Biomimetic Mineralized Organic–Inorganic Hybrid Macrofiber with Spider Silk‐Like Supertoughness

Zhao

et al. 2019

Adv Funct Materials

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“…Notably, our device delivers a maximum energy density of 0.0487 and 10.19 mWh cm −3 , while the power densities are 0.553 and 129.1 mW cm −3 , respectively. As shown in Figure h, our asymmetric yarn SCs show a higher electrochemical performance than the recently reported fiber‐based SCs, such as Ni‐Co DHs//pen ink fiber SCs (0.00957 mWh cm −2 ), PPy@MnO 2 @rGO yarn SCs (1.1 mWh cm −3 ), PEDOT@MnO 2 //C@Fe 3 O 4 yarn SCs (0.0335 mWh cm −2 ), PPy@CNTs@UY yarn SCs (0.00613 mWh cm −2 ), hair/Ni/rGO/MnO 2 //hair/Ni/rGO fiber SCs (1.81 mW h cm −3 ), MnO 2 @TiN//N‐MoO 3− x fiber SCs (2.29 mWh cm −3 ), A‐CFT fiber SCs (0.35 mWh cm −3 ), CW/PNC/PEDOT//CW/CMK‐3 (0.01 mWh cm −2 ) . The enhanced eletrochemical performance can be attributed to the following factors: 1) the functionalized SS yarn has large surface area which is good for growth of active material and the electrolyte ion diffusion for fast and reversible capacitive reaction, leading to the achievement of high‐energy density supercapacitors; 2) the functionalized yarn with a rough surface can provide a strong adhesive force between the grown active material and the yarn, which benefits the long‐time cycling stability; and 3) there is enough space between active material particles, and thus volume expansion brought by the fast and long‐term capacitive reaction can be effectively buffered.…”

Section: Resultsmentioning

confidence: 57%

Design of Novel Wearable, Stretchable, and Waterproof Cable‐Type Supercapacitors Based on High‐Performance Nickel Cobalt Sulfide‐Coated Etching‐Annealed Yarn Electrodes

Chen

Wen

et al. 2018

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Rapid advances in functional electronics bring tremendous demands on innovation toward effective designs of device structures. Yarn supercapacitors (SCs) show advantages of flexibility, knittability, and small size, and can be integrated into various electronic devices with low cost and high efficiency for energy storage. In this work, functionalized stainless steel yarns are developed to support active materials of positive and negative electrodes, which not only enhance capacitance of both electrodes but can also be designed into stretchable configurations. The as-made asymmetric yarn SCs show a high energy density of 0.0487 mWh cm (10.19 mWh cm ) at a power density of 0.553 mW cm (129.1 mW cm ) and a specific capacitance of 127.2 mF cm under an operating voltage window of 1.7 V. The fabricated SC is then made into a stretchable configuration by a prestraining-then-releasing approach using polydimethylsiloxane (PDMS) tube, and its electrochemical performance can be well maintained when stretching up to a high strain of 100%. Moreover, the stretchable cable-type SCs are stably workable under water-immersed condition. The method opens up new ways for fabricating flexible, stretchable, and waterproof devices.

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“…Similar studies with very efficient capacitance values using human hair are available in the literature [57][58][59][60]. In these studies, composite materials were created with human hair, either the material itself was used as an electrode [58] or the developed material was used to increase electrochemical activity [59][60].…”

Section: Figurementioning

confidence: 75%

Carbon Microrod Material Derived From Human Hair and Its Electrochemical Supercapacitor Application

Altuntaş¹,

Aslan²,

Nevruzoğlu³

2021

Gazi University Journal of Science

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Hair-based flexible knittable supercapacitor with wide operating voltage and ultra-high rate capability

Cited by 65 publications

References 49 publications

Biomimetic Mineralized Organic–Inorganic Hybrid Macrofiber with Spider Silk‐Like Supertoughness

Biomimetic Mineralized Organic–Inorganic Hybrid Macrofiber with Spider Silk‐Like Supertoughness

Design of Novel Wearable, Stretchable, and Waterproof Cable‐Type Supercapacitors Based on High‐Performance Nickel Cobalt Sulfide‐Coated Etching‐Annealed Yarn Electrodes

Carbon Microrod Material Derived From Human Hair and Its Electrochemical Supercapacitor Application

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