Graphene Films for Flexible Organic and Energy Storage Devices.

TL;DR: An ideal candidate material, Mo2C monolayer, with not only required large capacity but also high stability and mobility by means of first-principles calculations is reported, highlighting the promise of Mo2Cs as an appealing anode material for both lithium-ion and sodium-ion batteries.

TL;DR: In this paper, the authors have studied the current progress and selected challenges in the syntheses of graphene, h-BN and MoS2 including energy storage applications as supercapacitors and batteries.

TL;DR: In this paper, a review mainly focuses on the mechanical deformation characterization, analysis, and structural design strategies used in recent flexible lithium-ion batteries (LIBs) and supercapacitors (SCs).

Abstract: DOI: 10.1002/admt.201700248 intelligence, healthcare monitoring, artificial prosthesis, and human–machine interaction electronics.[1–4] Human skin, served as the largest sensory organ in human body, can help us communicate with surroundings such as the contacted pressures, changed temperatures, shapes, and textures of touched objects, via the specialized sense receptors.[5,6] For an intact haptic system, the collected information will be sent to the central nervous systems for comprehending and processing the meaning of the received information, and then our body will be guided to respond to the physical contact successfully. To imitate the sophisticated perception of human skin, various kinds of functional electronic devices which can sense and distinguish external physical, chemical, and biological signals simultaneously are integrated in a flexible or elastic system likes human skin. The functional electronic devices including pressure sensor, temperature sensor, and humidity sensor[7–9] have the ability to transfer the generated information from physical signals into electrical signals that electronic devices can recognize.[10–12] However, there remains enormous challenges to construct E-skins with multimodal detection, fleet response, high sensitivity and resolution, even though much research has been reported on the imitation of human skin behaviors recently. The rise of E-skins in early years may be resulted from the inspiration of science fiction and movies, which builds a bridge between virtual imagination and scientific reality. Since a prosthetic hand with tactile feedback was demonstrated by Clippinger et al. in 1974,[13] several studies have been followed to explore the potential application of tactile bionics.[14–16] Especially, flexible electronics achieved significant progress which served as a foundation to construct E-skins, due to the particular importance of mechanical compliance and highly sensitive characteristics in mimicking human skin.[17–21] For examples, Rogers and co-workers developed flexible electronics technologies to transfer traditional Si electronic devices onto 100 nm ultrathin films connected by stretchable interconnects.[22,23] Someya and co-workers integrated a large-scale organic fieldeffect transistors (FETs) based on flexible pentacene which showed excellent pressure sensitivity.[24] Bao and coworkers developed novel self-healing and mechanical force sensing E-skins with microstructured elastomeric dielectrics.[25–27] In addition, piezoresistive, capacitive, and piezoelectric sensors are deemed as three major transduction mechanisms for the Human skin, the largest organ of human body, can perceive tactile sensations, temperature, humidity, and other complex environmental stimulations. To mimic the capabilities of human skin, graphene provides great potential in building wearable electronic skins (E-skins), which hold broad applications in advanced robotics, healthcare monitoring, artificial intelligence, human– machine interfaces, etc. Herein, the recent progress in flexible tactile sensors and E-skins based on graphene material is presented. A brief introduction of the main approaches to prepare graphene nanosheets is provided. The main developments on the functions and mechanisms of bionic functional devices in E-skins including tactile sensors, temperature sensors, and humidity sensors are then highlighted. The current and future applications for graphenebased E-skins, such as multifunctional biomimetic E-skins, healthcare monitoring, and interactive human–machine interface, are also described. Finally, the existing challenges and future development trends for graphenebased E-skins are discussed.

TL;DR: The roll-to-roll production and wet-chemical doping of predominantly monolayer 30-inch graphene films grown by chemical vapour deposition onto flexible copper substrates are reported, showing high quality and sheet resistances superior to commercial transparent electrodes such as indium tin oxides.

TL;DR: CMG materials are made from 1-atom thick sheets of carbon, functionalized as needed, and here their performance in an ultracapacitor cell is demonstrated, illustrating the exciting potential for high performance, electrical energy storage devices based on this new class of carbon material.

TL;DR: Electrochemical capacitors enable rapid storage and efficient delivery of electrical energy in heavy-duty applications and are being enabled by electrochemical capacitor technology.

TL;DR: A solution-based method is reported that allows uniform and controllable deposition of reduced graphene oxide thin films with thicknesses ranging from a single monolayer to several layers over large areas, which could represent a route for translating the interesting fundamental properties of graphene into technologically viable devices.