Does Ragone plot work in electric energy storage?

While there is consensus on the general Ragone plot concept, many implementations are found in the literature. This article provides a systematic and comprehensive review of the Ragone plot methodology in the field of electric energy storage.

What is Ragone plot?

Ragone plot is the curve that displays the energy available to load as a function of the power, which differentiate energy storage devices by means of the available energy and power .

Can rate capability and Ragone plots be generated for Sensible thermal storage devices?

Although not the focus here, rate capability and Ragone plots can also be generated for sensible thermal storage devices, where the rate capability curve will be approximately linear throughout the discharge process (similar to the voltage response of an electrical capacitor).

What are 'Ragone plots' for thermal storage?

In addition to the work by Yazawa et al., Christen developed what he referred to as ‘Ragone plots’ for thermal storage, but approached it from a simplified thermodynamic perspective that cannot evaluate specific materials or designs of thermal storage devices 28.

Are thermal Ragone plots based on cost-based optimization?

However, the focus of the thermal Ragone plots presented here, as in the Ragone plots used for battery research, is not on cost-based optimization, but rather on the performance trade-off between energy and power. This framework sets a clear objective: push the Ragone curve up (higher power) and to the right (higher energy).

What is a Ragone framework for thermal energy storage?

A new Ragone framework for thermal energy storage provides guidance for researchers on how to optimize new thermal storage materials or devices for both energy and power density. This framework will accelerate the development of novel thermal storage technologies.