Issue 2, 2023

Engineering the modulation of the active sites and pores of pristine metal–organic frameworks for high-performance sodium-ion storage

Abstract

Metal–organic framework materials have numerous significant merits for use as electrodes in sodium-ion batteries, such as multiple active sites and porous structures. However, the masked active sites and pores limit their performances. Herein, we rationally selected Ni-HHTP (HHTP = 2,3,6,7,10,11-hexahydroxytriphenylene) with a stable structure, and adopted thermal treatment prior to its carbonization to open blocked pores and expose multiple active sites. As expected, after thermal treatment at a low temperature of 250 °C, the obtained Ni-HHTP-250 sample still retained the intrinsic crystal skeleton and crystal type, and exposed more actives sites and pores than those of pristine Ni-HHTP. The obtained Ni-HHTP-250 as an electrode material for sodium-ion batteries exhibits a large reversible discharge capacity of 420 mA h g−1 at 0.1 A g−1 along with a fine rate capability of 200 mA h g−1 at 2.0 A g−1. Mechanism studies show that both the Ni ions and organic ligands in the Ni-HHTP-250 sample are active sites. The H2O molecules and the –OH subgroups in the pores masking the active site can be removed after heat treatment. Hence, the excellent electrochemical performance is largely due to the open porous structure and exposed active sites, resulting in rapid Na+ diffusion and relatively high electronic conductivity. This work offers an innovative idea for preparing high-performance electrodes of metal-ion batteries.

Graphical abstract: Engineering the modulation of the active sites and pores of pristine metal–organic frameworks for high-performance sodium-ion storage

Supplementary files

Article information

Article type
Research Article
Submitted
03 အောက် 2022
Accepted
10 နို 2022
First published
11 နို 2022

Inorg. Chem. Front., 2023,10, 396-405

Engineering the modulation of the active sites and pores of pristine metal–organic frameworks for high-performance sodium-ion storage

W. Shuang, Y. Wang, F. Chen, Y. Wu, Z. Bai and L. Yang, Inorg. Chem. Front., 2023, 10, 396 DOI: 10.1039/D2QI02117J

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