Decoupling of mechanical properties and ionic conductivity in supramolecular lithium ion conductors

Mackanic, David G.; Yan, Xuzhou; Zhang, Liqun; Matsuhisa, Naoji; Yu, Zhiao; Jiang, Yuanwen; Manika, Tuheen; Lopez, Jeffrey; Yan, Hongping; Li, Kai; Chen, Xiao; Cui, Yi; Bao, Zhenan

doi:10.1038/s41467-019-13362-4

Cited by 315 publications

(261 citation statements)

References 73 publications

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“…Therefore, these monitors can miss paroxysmal arrhythmia events that are too short in duration or too catastrophic in nature to be captured by the patient and cannot measure arrhythmia burden. As wearable devices become increasingly flexible, stretchable and weightless, they can be comfortably worn continuously to provide uninterrupted ECG data 34 .…”

Section: Ecg Monitoringmentioning

confidence: 99%

Integration of novel monitoring devices with machine learning technology for scalable cardiovascular management

et al. 2020

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Ambulatory monitoring is increasingly important for cardiovascular care but is often limited by the unpredictability of cardiovascular events, the intermittent nature of ambulatory monitors and the variable clinical significance of recorded data in patients. Technological advances in computing have led to the introduction of novel physiological biosignals that can increase the frequency at which abnormalities in cardiovascular parameters can be detected, making expert-level, automated diagnosis a reality. However, use of these biosignals for diagnosis also raises numerous concerns related to accuracy and actionability within clinical guidelines, in addition to medico-legal and ethical issues. Analytical methods such as machine learning can potentially increase the accuracy and improve the actionability of device-based diagnoses. Coupled with interoperability of data to widen access to all stakeholders, seamless connectivity (an internet of things) and maintenance of anonymity, this approach could ultimately facilitate near-real-time diagnosis and therapy. T he se tools are increasingly recognized by regulatory a g e n c ies a n d p r o f e s s ional m e d ic al s oc ie ti es, but several technical and ethical issues remain. In this Review, we describe the current state of cardiovascular monitoring along the continuum from biosignal acquisition to the identification of novel biosensors and the development of analytical techniques and ultimately to regulatory and ethical issues. Furthermore, we outline new paradigms for cardiovascular monitoring.

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Section: Ecg Monitoringmentioning

confidence: 99%

Integration of novel monitoring devices with machine learning technology for scalable cardiovascular management

et al. 2020

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“…Stretchable electronic materials have gained significant attention with the increasing needs for wearable electronics. [ 1–6 ] Several promising applications such as stretchable circuits, [ 7–11 ] displays, [ 12–14 ] and batteries [ 15–21 ] have been successfully demonstrated. For some applications, stretchable transistors provide signal amplification and a switching functionality.…”

Section: Introductionmentioning

confidence: 99%

F4‐TCNQ as an Additive to Impart Stretchable Semiconductors with High Mobility and Stability

Mun

Kang

Zheng

et al. 2020

Adv Elect Materials

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Numerous strategies are developed to impart stretchability to polymer semiconductors. Although these methods improve the ductility, mobility, and stability of such stretchable semiconductors, they nonetheless still need further improvement. Here, it is shown that 2,3,5,6‐tetrafluoro‐7,7,8,8‐tetracyanoquinodimethane (F4‐TCNQ) is an effective molecular additive to tune the properties of a diketopyrrolopyrrole‐based (DPP‐based) semiconductor. Specifically, the addition of F4‐TCNQ is observed to improve the ductility of the semiconductor by altering the polymer’s microstructures and dynamic motions. As a p‐type dopant additive, F4‐TCNQ can also effectively enhance the mobility and stability of the semiconductor through changing the host polymer’s packing structures and charge trap passivation. Upon fabricating fully stretchable transistors with F4‐TCNQ‐DPP blended semiconductor films, it is observed that the resulting stretchable transistors possess one of the highest initial mobility of 1.03 cm2 V−1 s−1. The fabricated transistors also exhibit higher stability (both bias and environmental) and mobility retention under repeated strain, compared to those without F4‐TCNQ additive. These findings offer a new direction of research on stretchable semiconductors to facilitate future practical applications.

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“…The discharge capacity is up to 136 mA h g −1 at a current density of 16 mA g −1 (≈0.12C, 1C = 136 mA g −1 , based on the active cathodic material), comparable to that of state‐of‐the‐art Li‐ion batteries based on an LFP cathode (Figure 5b). [ 38 ] After 20 cycles of continuously varied rates, a considerable capacity of ≈40 mA h g −1 is still maintained at 320 mA g −1 (Figure 5b, Figures S13 and S14, Supporting Information), superior than that reported for polymer electrolytes, [ 39 ] indicating a desirable rate performance supported by PLZ albeit with the high viscoelasticity. Moreover, 82% of the discharge capacity was retained after 400 cycles at a current density of 80 mA g −1 (Figure 5c, Figure S15, Supporting Information).…”

Section: Resultsmentioning

confidence: 95%

Ionic‐Association‐Assisted Viscoelastic Nylon Electrolytes Enable Synchronously Coupled Interface for Solid Batteries

Zhao

Fan

Zhao

et al. 2020

Adv Funct Materials

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Electrolyte/electrode heterointerfaces activated by unhindered charge transfer play an important role in solid-state and flexible batteries. However, continuous electrochemical cycling and mechanical deformations cause structural dislocation and unwanted reactions. An important challenge is to ensure enduring accurate contact between the battery components. The customization of a highly viscoelastic polyamide (PA, nylon)-based solid electrolyte to address this key issue is presented. The approach involves the use of concentrated aqueous solutions of bis(trifluoromethane)sulfonimide lithium (LiTFSI) to structurally "unzip" and relink pristine hydrogen-bonded PA chains by bridged cation-anion association. This elaborately tailored crosslinking technique confers upon the resultant electrolyte a combination of the preferred mechanical characteristics including high viscoelasticity and reversible stretchability, together with outstanding electrochemical performance represented by high ion conductivity (2.7 × 10 −4 S cm −1 ) and high anodic stability (>3 V vs Zn/Zn 2+ ). Flexible batteries with a wellintegrated configuration in which synchronous electrolyte/electrode movement guarantees intimate and compatible interfaces even during extreme deformations and electrochemical stimulations, are further demonstrated. These results reveal a promising opportunity to overcome the bottleneck caused by interfacial defects for next-generation solid batteries by reconstituting the structure of classical polymers and developing functional electrolytes.

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Decoupling of mechanical properties and ionic conductivity in supramolecular lithium ion conductors

Cited by 315 publications

References 73 publications

Integration of novel monitoring devices with machine learning technology for scalable cardiovascular management

Integration of novel monitoring devices with machine learning technology for scalable cardiovascular management

F4‐TCNQ as an Additive to Impart Stretchable Semiconductors with High Mobility and Stability

Ionic‐Association‐Assisted Viscoelastic Nylon Electrolytes Enable Synchronously Coupled Interface for Solid Batteries

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