Development of advanced electrochemical energy storage devices

What are electrochemical energy storage devices?

Electrochemical Energy Storage Devices─Batteries, Supercapacitors, and Battery–Supercapacitor Hybrid Devices Great energy consumption by the rapidly growing population has demanded the development of electrochemical energy storage devices with high power density, high energy density, and long cycle stability.

Are lithium-ion batteries a promising electrochemical energy storage device?

Batteries (in particular, lithium-ion batteries), supercapacitors, and battery–supercapacitor hybrid devices are promising electrochemical energy storage devices. This review highlights recent progress in the development of lithium-ion batteries, supercapacitors, and battery–supercapacitor hybrid devices.

What are the different types of energy storage systems?

Hence, a popular strategy is to develop advanced energy storage devices for delivering energy on demand. 1 - 5 Currently, energy storage systems are available for various large-scale applications and are classified into four types: mechanical, chemical, electrical, and electrochemical, 1, 2, 6 - 8 as shown in Figure 1.

How can a hybrid electrode design improve electron transport?

Advanced approaches, aiming at introducing more electrochemically active sites and shortening the transport path for electrons and diffusion length for ions, have been discussed. This is achieved through the selection of an appropriate pseudocapacitive material and the careful design of the hybrid electrode architecture.

How do EDLCs store energy without a faradaic reaction?

The energy storage of EDLCs is via charge adsorption at the surface of the electrode without any faradaic reactions. 24, 27 During the charge/discharge processes, the arrangement of the charges in the Helmholtz double layer results in a displacement current.

What are the challenges of electrode design?

One key challenge is the identification of ideal electrode materials that satisfy the requirements of high energy/power densities and long cycle. 12 Strategies such as decreasing the particle size, 13, 14 controlling the morphology, 15 and producing hybrid materials 16 have been proposed.