Crystalline, porous, covalent polyoxometalate-organic frameworks for lithium-ion batteries

Xiuqin Yu , Cuiyan Li , Yunchao Ma , Daohao Li , Hui Li , Xinyu Guan , Yushan Yan , Valentin Valtchev (1) , Shilun Qiu , Qianrong Fang

1 LCS - Laboratoire catalyse et spectrochimie

The development of covalent organic frameworks (COFs) with new building units is of critical importance for enriching the structural diversity and expanding their functions. However, the construction of COFs has been thus far limited primarily to traditional organic linkers. Herein, we report three-dimensional porous crystalline covalent polyoxometalate-organic frameworks (CPOFs) constructed from both inorganic and organic building blocks with reversible covalent bonds. These highly crystalline CPOFs exhibited 3-fold interpenetrated diamondoid topology, permanent porosity and high stability. Furthermore, these CPOFs could be directly applied as anode materials for lithium-ion batteries (LIBs) and displayed high reversible capacity (as high as 550 mA h g-1), rate performance, and cycling stability (up to 500 cycles).

Keywords: covalent organic frameworks; polyoxometalates; lithium-ion batteries

Domains: Chemical Sciences

Xiuqin Yu, Cuiyan Li, Yunchao Ma, Daohao Li, Hui Li, et al.. Crystalline, porous, covalent polyoxometalate-organic frameworks for lithium-ion batteries. Microporous and Mesoporous Materials, 2020, 299, pp.110105. ⟨10.1016/j.micromeso.2020.110105⟩. ⟨hal-03035279⟩