2023-09-19 22:00:00
The increasing demand for energy for the next generation of portable and miniaturized electronic devices has sparked intense interest in exploring energy storage devices at a micrometer scale. Indeed, a large number of devices connected to the Internet will be deployed and they individually consume very little energy, with equally low instantaneous power.
This article provides an overview of the progress of recent research on electrical energy storage microdevices, in particular those using electrochemical reaction mechanisms, and highlights their future importance for a broad spectrum of applications. Furthermore, many efforts have been devoted to the fabrication and integration of all-solid-state microsupercapacitors and microbatteries. These microdevices are characterized by an extended lifespan and a wide operating temperature range. Compared to conventional solutions, the dense thin film stack architecture reduces the ion diffusion length, thereby improving power density and promoting co-integration with miniaturized and heterogeneous systems. However, many challenges such as instability at interfaces, low volume energy density and high manufacturing cost continue to hinder the larger scale diffusion of microbatteries and microsupercapacitors. The selection of materials, the implementation of microtechnologies and performance indicators are analyzed. A so-called Ragone diagram makes it possible to locate the compromise between the power available at the terminals of the storage device and the stored energy. The impact of cycling microstorage devices is commented on. Finally, medium-term research directions, technical challenges and optimization prospects are also discussed.
Key points
Field: miniature energy storage
Degree of diffusion of technology: emergence
Technologies involved: microfabrication
Areas of application: energy storage and conversion for IoT connected object networks
Main French players:
Other players around the world:
United States: MIT, Stanford University, Oak Ridge National Labs, University of Maryland
Korea: KIST Institute, Postech University
Taiwan: National Taiwan University
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#Electrical #energy #storage #microdevices #Complete #file
