An All-Solid-State Coaxial Structural Battery Using Sodium-Based Electrolyte

• Type: Article in International Scientific Journal
• Date: 2021

Authors

Federico Danzi (Author) FEUP; Pedro Ponces Camanho (Author) FEUP; Maria Helena Braga (Author) FEUP

Journal

Title: Molecules

Vol. 26 No. 17

Pages: 1-5226

ISSN: 1420-3049

Publisher: MDPI

Indexing

ISI Web of Knowledge - 9 Citations

ISI Web of Science

Scopus - 10 Citations

Associated Projects

MatER - MatER - Materials for Energy Research Group

LAETA2023 - Programático - ET - Emerging Technologies - LAETA2023 - Programático - ET - Emerging Technologies

Other information

Authenticus ID: P-00V-BFQ

DOI: 10.3390/molecules26175226

Abstract (EN): The transition to a sustainable society is paramount and requires the electrification of vehicles, the grid, industry, data banks, wearables, and IoT. Here, we show an all-solid-state structural battery where a Na+-based ferroelectric glass electrolyte is combined with metallic electrodes/current collectors (no traditional cathode present at fabrication) and thin-ply carbon-fiber laminates to obtain a coaxial multifunctional beam. This new concept aims to optimize the volume of any hollow beam-like structure by integrating an electrochemical system capable of both harvesting thermal and storing electrical energy while improving its mechanical performance. The coaxial cell is a coaxial cable where the dielectric is ferroelectric. The electrochemical results demonstrated the capability of performing three-minute charges to one-day discharges (70 cycles) and long-lasting discharges (>40 days at 1 mA) showing an energy density of 56.2 Wh center dot L-1 and specific energy of 38.0 Wh center dot kg(-1), including the whole volume and weight of the structural cell. This is the highest specific energy among safe structural cells, while no Na+-based structural cells were found in the literature. The mechanical tests, instead, highlighted the coaxial cell capabilities to withstand severe inelastic deformation without compromising its functionalities, while increasing the flexural strength of the hosting structure. Moreover, the absence of alkali metals and liquid electrolytes together with its enhanced thermal properties makes this coaxial structural battery a valid and safe alternative as an energy reservoir for all the applications where traditional lithium-ion batteries are not suitable.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 16