Wearable energy sources based on 2D materials

Abstract

Wearable energy sources are in urgent demand due to the rapid development of wearable electronics. Besides flexibility and ultrathin thickness, emerging 2D materials present certain extraordinary properties that surpass the properties of conventional materials, which make them advantageous for high-performance wearable energy sources. Here, we provide a comprehensive review of recent advances in 2D material based wearable energy sources including wearable batteries, supercapacitors, and different types of energy harvesters. The crucial roles of 2D materials in the wearable energy sources are highlighted. Based on the current progress, the existing challenges and future prospects are outlined and discussed.

Controlling Defects in Continuous 2D GaS Films for High‐Performance Wavelength‐Tunable UV‐Discriminating Photodetectors

“…[1][2][3][4] The applications in increasingly extensive fields demand the discovery of novel 2D semiconductors with particular properties. [5][6][7][8][9][10][11] For example, most 2D semiconductors that have been studied possess small bandgaps, while the applications for 2D light-emitting diodes (LEDs) . [32] The degradation of some members of the layered Ga family has been studied.…”

Construction of Large‐Area Ultrathin Conductive Metal–Organic Framework Films through Vapor‐Induced Conversion

“…[13] As one kind of MOF and its analogues, metal-organic graphene analogues (MOGA) with non-zero bandgaps exhibit good electrical conductivity. There have been some reports about the M 3 (HITP) 2 (HITP = 2,3,6,7,10,11-hexaiminotriphenylene), M 3 (hexaaminobenzene) 2 (M = Ni, Cu), and so on. [8,[13][14][15][16] These films can be applied as active materials to the electronic devices and some other fields, such as field-effect transistor, photovoltaics, electronic skin, photocatalysis and biosensor.…”

“…[6,13,14,[17][18][19][20] Nevertheless, some of the traditional but practical devices (e.g., field effect transistor (FET), light emitting diode (LED), light emitting transistor (LET), and so on) based on MOGA still remain at a very naive stage with almost no report. [1][2][3][4][5] The key technology about fabrication of large-area films with controllable thickness and orientation suppresses the development of devices, so the study on construction strategy is becoming extremely urgent. [21] While the opportunities to fabricate MOGA films have been explored in a few cases to date, there are still a lot of challenges to overcome: thin film quality, growth mechanism, controlling the defects, improving the stability, enhancing the electrical conductivity, and effectively manipulating charge carrier.…”

“…Owing to the novel electronic, optical, and mechanical properties, 2D materials, including organic single crystals (OSCs), graphene, graphene derivatives, perovskites, transition metal chalcogenides (TMDCs), covalent-organic frameworks (COFs), and metal-organic frameworks (MOFs), play important roles in device applications. [1][2][3][4][5][6][7] The OSCs, graphene derivatives, perovskites and TMDCs have been researched a lot in constructing devices and charge transfer mechanism. [1][2][3][4] Exhilaratingly, conductive COFs and MOFs as active materials are just starting to play important roles in electronic devices.…”

“…[1][2][3][4][5][6][7] The OSCs, graphene derivatives, perovskites and TMDCs have been researched a lot in constructing devices and charge transfer mechanism. [1][2][3][4] Exhilaratingly, conductive COFs and MOFs as active materials are just starting to play important roles in electronic devices. In spite of easy fabrication in a "top-down" approach and rational modification, the functional groups of COFs connect building blocks, but restrain diverse substrates, but also control thickness precisely at the nanoscale.…”