Two-dimensional materials for wireless power transfer

Gao, Mingyuan; Yao, Ye; Yang, Fan; Ye, Jin; Liu, Gang; Wang, Bowen; Liu, Sheng; Wang, Ping; Lu, Yuerui

doi:10.1016/j.device.2023.100022

Cited by 12 publications

(1 citation statement)

References 163 publications

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“…Chemical energy to electrical energy conversion methods such as fuel cells require an external fuel supply, which requires regular maintenance and leads to potential safety hazards such as leakage and explosion 20 , 21 . The near-field wireless power supply mode has a short working distance, and the energy that can be collected by the RF far-field energy harvesting technology is very weak (e.g., at the microwatt level), which cannot power Bluetooth and other milliwatt-level devices 22 , 23 .…”

Section: Introductionmentioning

confidence: 99%

Flexible thermoelectric generator and energy management electronics powered by body heat

Yang,

Li,

Deng

et al. 2023

Microsyst Nanoeng

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Uninterrupted, efficient power supplies have posed a significant hurdle to the ubiquitous adoption of wearable devices, despite their potential for revolutionizing human‒machine interactions. This challenge is further compounded by the requirement of these devices to supply dependable energy for data-intensive sensing and transmission. Traditional thermoelectric solutions fail to deliver satisfactory performance under conditions of extremely low voltages. Here, we present a novel solution of a wearable thermoelectric generator integrated with an energy management system, which is capable of powering sensors and Bluetooth by harnessing body heat. Distinct from previous works, our innovation lies in its ability to consistently operate even with a minimal temperature difference (i.e., 4 K) between the human skin and the ambient environment, ensuring reliable data transmission within a time as short as 1.6 s. Furthermore, our system can recharge utilizing body heat under ultralow voltage conditions (30 mV). Our developed system provides a novel pathway for the continuous, reliable monitoring of self-contained wearable devices without depending on batteries.

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Section: Introductionmentioning

confidence: 99%

Flexible thermoelectric generator and energy management electronics powered by body heat

Yang,

Li,

Deng

et al. 2023

Microsyst Nanoeng

Self Cite

View full text Add to dashboard Cite

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Wireless Power and Data Transfer Technologies for Flexible Bionic and Bioelectronic Interfaces: Materials and Applications

Mariello,

Proctor

2024

Adv Materials Technologies

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The next‐generation bionics and, more specifically, wearable and implantable bioelectronics require wireless, battery‐free, long‐term operation and seamless bio‐integration. Design considerations, materials choice, and implementation of efficient architectures have become crucial for the fabrication and deployment of wireless devices, especially if they are flexible or soft. Wireless power and data transfer represent key elements for the development of robust, efficient, and reliable systems for health monitoring, advanced disease diagnosis and treatment, personalized medicine. Here, the recent advances in materials and technologies used for wireless energy sourcing and telemetry in bio‐integrated flexible bionic and bioelectronic systems are reviewed. The study tackles different challenges related to mechanical compliance, low thickness, small footprint, biocompatibility, biodegradability, and in vivo implementation. The work also delves into the main figures of merit that are mostly adopted to quantify the wireless power/data transfer performances. Lastly, the pivotal applications of wearable and implantable wireless bionics/bioelectronics are summarized, such as electrical stimulation/recording, real‐time monitoring of physiological parameters, light delivery trough optical interfaces, electromechanical stimulation via ultrasounds, highlighting their potential for future implementation and the challenges related to their commercialization.

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Surface functionalization of naturally occurring silicate minerals infused hydrocarbon polymer matrix for ultra‐low dielectric performance at high frequency domain

Islam,

Deb,

Hasan

et al. 2024

Polymer Composites

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The expanding realm of high‐frequency electronics necessitates materials with exceptional attributes: notably, a low dielectric constant (Dk) to minimize signal propagation delays, high thermal conductivity for effective heat dissipation, higher breakdown strength, and robust mechanical properties to withstand demanding operational environments. While cycloolefin copolymers (COC) excel in electrical insulation, chemical resistance, and mechanical durability, their intrinsic slightly higher dielectric constant compared to other polymers, along with challenges such as poor dispersibility and low compatibility with nanoparticles, hinder their full potential in this domain. Considering these drawbacks, this study fabricated a series of COC/mica composites by integrating natural mica particles into the COC matrix via a CTAB‐assisted surface modification of mica to enhance dispersibility and mitigating particle aggregation through in‐situ mixing and hot‐press methods. The resultant composites demonstrate an outstanding ultra‐low Dk of 1.44, marking a significant decrease of over 36% compared to pristine COC with a Dk of 2.26, along with exceptionally low dielectric loss (δ) of 0.00013 at the frequency of 10 GHz, high dielectric breakdown strength ~49.40 kV/mm and enhanced thermal conductivity up to 0.88 W/(m K) at 40% mica loading. Additionally, the composites heightened mechanical performances like tensile strength 69 MPa at 6.5% elongation at break, impact strength up to ~17.9 kJ × m−2, and exceptional water resistance with absorption below 0.097%. These exceptional ultra‐low dielectric performance with above mentioned properties can meet the stringent requirements of modern high‐frequency electronics packaging for next generation electronics development.Highlights Surface modification by CTAB enhanced homogeneous dispersibility of composites. Achieved ultra‐low dielectric constant and loss compared to pure COC. Thermal conductivity improved significantly with incorporation of mica. Unlocking high‐frequency applications potential with ultralow Dk performance.

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Two-dimensional materials for wireless power transfer

Cited by 12 publications

References 163 publications

Flexible thermoelectric generator and energy management electronics powered by body heat

Flexible thermoelectric generator and energy management electronics powered by body heat

Wireless Power and Data Transfer Technologies for Flexible Bionic and Bioelectronic Interfaces: Materials and Applications

Surface functionalization of naturally occurring silicate minerals infused hydrocarbon polymer matrix for ultra‐low dielectric performance at high frequency domain

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