Issue 29, 2024

A recrystallized organic cathode with high electrical conductivity for fast sodium-ion storage

Abstract

Organic electrode materials have attracted much attention in the field of batteries owing to their low-cost, structure diversity and environmental friendliness. However, most of them suffer from low electrical conductivity, sluggish reaction kinetics, and poor cycle life. In this work, we develop a strategy of fabricating a naphthalene diimide-based sodium salt cathode with high electrical conductivity for facilitating the charge transfer and accelerating the reaction kinetics by the dissolution/reprecipitation process. The recrystallization process of naphthalene molecules in water enhances intermolecular π–π interactions, leading to the formation of a uniform rod-like morphology and significantly increasing its electrical conductivity, which allows fast charge transfer kinetics and high ionic conductivity of organic electrodes in sodium-ion batteries. Therefore, the recrystallized organic cathode (NDI-ONa-r) exhibits a high specific capacity of 145 mA h g−1 at 0.1 A g−1, excellent fast charge/discharge performance (70 mA h g−1 at 20 A g−1, about 127C), and an ultra-long cycle life of 30 000 cycles at 10 A g−1 with a capacity retention of 87%. As a result, the NDI-ONa-r//HC full cells also show a high specific capacity of 140 mA h g−1 at 0.1 A g−1 and good rate performance. Our work presents a potential way to fundamentally facilitate fast electron transport and ion diffusion in organic electrode materials, which would motivate their application in high-performance sodium-ion batteries.

Graphical abstract: A recrystallized organic cathode with high electrical conductivity for fast sodium-ion storage

Supplementary files

Article information

Article type
Paper
Submitted
04 апр. 2024
Accepted
17 јун. 2024
First published
17 јун. 2024

J. Mater. Chem. A, 2024,12, 18286-18293

A recrystallized organic cathode with high electrical conductivity for fast sodium-ion storage

Z. Shan, S. Yang, X. Zhang and Y. Chen, J. Mater. Chem. A, 2024, 12, 18286 DOI: 10.1039/D4TA02302A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements