Cellulose Nanofibrils Enhanced, Strong, Stretchable, Freezing‐Tolerant Ionic Conductive Organohydrogel for Multi‐Functional Sensors

Advanced Functional Materials, Journal Year: 2020, Volume and Issue: 30(35)

Published: July 14, 2020

Abstract To date, ionic conducting hydrogel attracts tremendous attention as an alternative to the conventional rigid metallic conductors in fabricating flexible devices, owing their intrinsic characteristics. However, simultaneous realization of high stiffness, toughness, conductivity, and freezing tolerance through a simple approach is still challenge. Here, novel highly stretchable (up 660%), strong 2.1 MPa), tough (5.25 MJ m −3 ), transparent 90%) conductive (3.2 S −1 ) organohydrogel facilely fabricated, sol–gel transition polyvinyl alcohol cellulose nanofibrils (CNFs) dimethyl sulfoxide‐water solvent system. The presents superior tolerance, remaining (1.1 even at −70 °C, compared other reported anti‐freezing (organo)hydrogel. Notably, this material design demonstrates synergistic effect CNFs boosting both mechanical properties tackling long‐standing dilemma among strength, conductivity for hydrogel. In addition, displays sensitivity toward tensile compressive deformation based on which multi‐functional sensors are assembled detect human body movement with sensitivity, stability, durability. This envisioned function versatile platform future.

Language: Английский

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Advanced Nanocellulose‐Based Composites for Flexible Functional Energy Storage Devices

Advanced Materials, Journal Year: 2021, Volume and Issue: 33(48)

Published: Sept. 24, 2021

With the increasing demand for wearable electronics (such as smartwatch equipment, health monitoring systems, and human-robot interface units), flexible energy storage systems with eco-friendly, low-cost, multifunctional characteristics, high electrochemical performances are imperative to be constructed. Nanocellulose sustainable natural abundance, superb properties, unique structures has emerged a promising nanomaterial, which shows significant potential fabricating functional systems. This review is intended provide novel perspectives on combination of nanocellulose other materials design fabricate nanocellulose-based composites advanced devices. First, structural characteristics properties briefly introduced. Second, structure-property-application relationships these addressed optimize their from perspective processing technologies micro/nano-interface structure. Next, recent specific applications composites, ranging lithium-ion batteries supercapacitors emerging devices, such lithium-sulfur batteries, sodium-ion zinc-ion comprehensively discussed. Finally, current challenges future developments in next generation proposed.

Language: Английский

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Multifunctional Superelastic, Superhydrophilic, and Ultralight Nanocellulose‐Based Composite Carbon Aerogels for Compressive Supercapacitor and Strain Sensor

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(26)

Published: March 3, 2022

Abstract Developing superelastic and superhydrophilic carbon aerogels with intriguing mechanical properties is urgently desired for achieving promising performances in highly compressive supercapacitors strain sensors. Herein, based on synergistic hydrogen bonding, electrostatic interaction, π–π interaction within regularly arranged layered porous structures, conductive cellulose nanofibrils (CNF), nanotubes (CNT) reduced graphene oxide (RGO) are developed via bidirectional freezing subsequent annealing. Benefiting from the architecture high surface roughness, CNF/CNT/RGO exhibit ultralow density (2.64 mg cm –3 ) superhydrophilicity (water contact angle ≈0° at 106 ms). The honeycomb‐like ordered structure can efficiently transfer stress entire microstructure, thereby endowing compressibility extraordinary fatigue resistance (10,000 cycles 50% strain). These be assembled into solid‐state symmetric showing excellent area capacitance (109.4 mF –2 0.4 mA superior long cycle compression performance (88% after 5000 of 50%). Furthermore, reveal good linear sensitivity ( S = 5.61 kPa –1 accurately capture human bio‐signals as It expected that such will provide a novel multifunctional platform wearable electronics, electronic skin, motion monitoring.

Language: Английский

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Copper-coordinated cellulose ion conductors for solid-state batteries

Nature, Journal Year: 2021, Volume and Issue: 598(7882), P. 590 - 596

Published: Oct. 20, 2021

Language: Английский

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Hard Carbon Anodes for Next‐Generation Li‐Ion Batteries: Review and Perspective

Advanced Energy Materials, Journal Year: 2021, Volume and Issue: 11(38)

Published: Sept. 1, 2021

Abstract Carbonaceous materials have been accepted as a promising family of anode for lithium‐ion batteries (LIBs) owing to optimal overall performance. Among various emerging carbonaceous materials, hard carbons recently gained significant attention high‐energy LIBs. The most attractive features are the enriched microcrystalline structure, which not only benefits uptake more Li + ions but also facilitates intercalation and deintercalation. However, booming application is significantly slowed by low initial Coulombic efficiency, large irreversible capacity, voltage hysteresis. Many efforts devoted address these challenges toward practical applications. This paper focuses on an up‐to‐date overview carbons, with emphasis lithium storage fundamentals material classification well present potential solutions. future prospects perspectives enable in next‐generation highlighted.

Language: Английский

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Green Carbon Science: Efficient Carbon Resource Processing, Utilization, and Recycling towards Carbon Neutrality

Angewandte Chemie International Edition, Journal Year: 2021, Volume and Issue: 61(15)

Published: Dec. 17, 2021

Green carbon science is defined as the "study and optimization of transformation carbon-containing compounds relevant processes involved in entire cycle from resource processing, energy utilization, CO2 fixation, recycling to utilize resources efficiently minimize net emission."[1] related closely neutrality, fields have developed quickly last decade. In this Minireview, we propose concept index, recent progress petroleum refining, production liquid fuels, chemicals, materials using coal, methane, , biomass, waste plastics highlighted combination with green science. An outlook for these important provided final section.

Language: Английский

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Cellulose Nanopaper: Fabrication, Functionalization, and Applications

Nano-Micro Letters, Journal Year: 2022, Volume and Issue: 14(1)

Published: April 13, 2022

Abstract Cellulose nanopaper has shown great potential in diverse fields including optoelectronic devices, food packaging, biomedical application, and so forth, owing to their various advantages such as good flexibility, tunable light transmittance, high thermal stability, low expansion coefficient, superior mechanical properties. Herein, recent progress on the fabrication applications of cellulose is summarized discussed based analyses latest studies. We begin with a brief introduction three types nanocellulose: nanocrystals, nanofibrils bacterial cellulose, recapitulating differences preparation Then, main methods filtration method casting well newly developed technology are systematically elaborated compared. Furthermore, advanced energy storage, electronic water treatment, high-performance packaging materials were highlighted. Finally, prospects ongoing challenges summarized.

Language: Английский

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Biopolymer-based hydrogel electrolytes for advanced energy storage/conversion devices: Properties, applications, and perspectives

Energy storage materials, Journal Year: 2022, Volume and Issue: 48, P. 244 - 262

Published: March 15, 2022

Language: Английский

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Muscle‐Inspired MXene Conductive Hydrogels with Anisotropy and Low‐Temperature Tolerance for Wearable Flexible Sensors and Arrays

Advanced Functional Materials, Journal Year: 2021, Volume and Issue: 31(46)

Published: Aug. 16, 2021

Abstract Conductive hydrogels as flexible electronic devices, not only have unique attractions but also meet the basic need of mechanical flexibility and intelligent sensing. How to endow anisotropy a wide application temperature range for traditional homogeneous conductive sensors is still challenge. Herein, directional freezing method used prepare anisotropic MXene that are inspired by ordered structures muscles. Due hydrogels, properties electrical conductivity enhanced in specific directions. The resistance −36 25 °C through solvent substitution. Thus, muscle‐inspired with low‐temperature can be wearable sensors. sensing signals further displayed on mobile phone images wireless technology, will change collected achieve motion detection. Multiple assembled into 3D sensor array detecting magnitude spatial distribution forces or strains. orientation promising sensors, which broad prospects human–machine interface compatibility medical monitoring.

Language: Английский

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MXene‐Based Conductive Organohydrogels with Long‐Term Environmental Stability and Multifunctionality

Advanced Functional Materials, Journal Year: 2020, Volume and Issue: 30(48)

Published: Sept. 18, 2020

Abstract Conductive hydrogels are promising interface materials utilized in bioelectronics for human–machine interactions. However, the low‐temperature induced freezing problem and water evaporation‐induced structural failures have significantly hindered their practical applications. To address these problems, herein, an elaborately designed nanocomposite organohydrogel is fabricated by introducing highly conductive MXene nanosheets into a tannic acid‐decorated cellulose nanofibrils/polyacrylamide hybrid gel network infiltrated with glycerol (Gly)/water binary solvent. Owing to introduction of Gly, as‐prepared demonstrates outstanding flexibility electrical conductivity under wide temperature spectrum (from −36 60 °C), exhibits long‐term stability open environment (>7 days). Additionally, dynamic catechol‐borate ester bonds, along readily formed hydrogen bonds between Gly molecules, further endow excellent stretchability (≈1500% strain), high tissue adhesiveness, self‐healing properties. The favorable environmental broad working strain range (≈500% strain); together sensitivity (gauge factor 8.21) make this candidate both large subtle motion monitoring.

Language: Английский

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