Rational design of a zwitterionic porous organic framework loaded with Co(ii) ions to host sulfur and synergistically boost polysulfide redox kinetics for lithium sulfur batteries

Miao Sun,Haifeng Ji,Xiaojie Zhang,Yi Feng,Gaojie Yan,Jingjing Shi

doi:10.1039/d1ma00875g

Miao Sun, Haifeng Ji + Show 4 more

Open Access

https://doi.org/10.1039/d1ma00875g

Copy DOI

Abstract

A cobalt(ii) modified multifunctional porous organic framework (POF) as the cathode to obtain a high-performance lithium–sulfur battery.

Highlights

A significant number of research studies have indicated that metal oxides, nanoparticles and mixed valence compounds containing transition metals like Mn, Co, Ni, Fe and Cu exhibit outstanding catalytic activity under electrochemical conditions.[19,20,21] For example, Kathiresan and co-workers[22] developed a porous organic polymer (POP) embedded with Co nanoparticles as a bifunctional electrocatalyst
The dendritic structure of HUT4 (C2094H570N1140O954) was built using the Dendrimer module, and the number of atoms reached the Density functional theory (DFT) calculations were used to demonstrate that zwitterionic porous organic framework HUT4 loaded with Co(II) ions exhibited excellent performance on adsorbing and fast conversion of lithium polysulfides (LiPSs)
The electrostatic potential (Fig. 1b and others in Fig. S2, Electronic supplementary information (ESI)†) and charge density differences (Fig. 1c and others in Fig. S3, ESI†) of Co-HUT4@Li2S8 were accurately calculated to prove the excellent ability of Co-HUT4 on absorbing LiPSs

Summary

Introduction

A significant number of research studies have indicated that metal oxides, nanoparticles and mixed valence compounds containing transition metals like Mn, Co, Ni, Fe and Cu exhibit outstanding catalytic activity under electrochemical conditions.[19,20,21] For example, Kathiresan and co-workers[22] developed a porous organic polymer (POP) embedded with Co nanoparticles as a bifunctional electrocatalyst.

Results

Conclusion