Poly(p-phenylenediamine)-Coated Metal-Organic Frameworks for High-Performance Sodium-Ion Batteries: The Balance of Capacity and Stability

Liang-Yu Wang; Zhi-Peng Cai; Chao Ma; Kai-Xue Wang; Jie-Sheng Chen

doi:10.1021/acsami.3c10751

Poly(p-phenylenediamine)-Coated Metal-Organic Frameworks for High-Performance Sodium-Ion Batteries: The Balance of Capacity and Stability

ACS Appl Mater Interfaces. 2023 Sep 20;15(37):44364-44372. doi: 10.1021/acsami.3c10751. Epub 2023 Sep 5.

Authors

Liang-Yu Wang¹, Zhi-Peng Cai¹, Chao Ma², Kai-Xue Wang¹, Jie-Sheng Chen¹

Affiliations

¹ Shanghai Electrochemical Energy Devices Research Center, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China.
² College of Smart Energy, Shanghai Jiao Tong University, Shanghai 200240, P. R. China.

PMID: 37668259
DOI: 10.1021/acsami.3c10751

Abstract

Metal-organic frameworks (MOFs) with well-defined porous structures and highly active frameworks are considered as promising electrode materials for sodium-ion batteries (SIBs). However, the structure pulverization upon sodiation/desodiation impacts on their practical application in SIBs. To address this issue, poly(p-phenylenediamine) (PPA) was uniformly coated onto the surface of MIL-88A, a typical Fe-based MOF through in situ polymerization initiated by the metal ions (Fe³⁺) of MIL-88A. Used as an anode material for SIBs, the PPA-coated MIL-88A, denoted as PPA@MIL-88A, showed significantly improved electrochemical performance. A reversible capacity as high as 230 mAh g^-1 was achieved at 0.2 A g^-1 even after 500 cycles. MIL-88A constructed with electrochemically active Fe³⁺ and fumaric acid ligands guarantees the high specific capacity, while the PPA polymer coating effectively inhibits the pulverization of MIL-88A. This work provides an efficient strategy for improving the structure and cycling stability of MOFs-based electrode materials.

Keywords: MOF; in situ polymerization; sodium-ion batteries; structural stability; surface coating.