Journal of Shanghai University(Natural Science Edition) ›› 2022, Vol. 28 ›› Issue (1): 91-101.doi: 10.12066/j.issn.1007-2861.2224

• Research Articles • Previous Articles     Next Articles

Adsorption and transport properties of the lithium ion in a covalent organic framework/carbon nanotube composite by molecular simulation

XU Yi1(), CUI Zhiyuan1, WU Fan1, YUAN Bin2   

  1. 1. School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China
    2. Weidmann Diagnostic Solutions (Shanghai) Co., Ltd., Shanghai 201114, China
  • Received:2020-01-10 Online:2022-02-28 Published:2022-03-02
  • Contact: XU Yi E-mail:tree2000xy@shu.edu.cn

Abstract:

In this study, the adsorption and transport properties of the lithium ion (Li$^{+})$ in a covalent organic framework/carbon nanotube composite (COF@CNT) are investigated through molecular simulation. The adsorption sites and sequence of Li$^{+}$ are defined and the corresponding adsorption energy is obtained. In addition, apparent change in the morphology of the COF@CNT is identified. When saturated adsorption is reached, the volumetric change rate of the COF@CNT is only 0.25. Simultaneously, the average voltage is maintained at greater than 2.00 V, and the theoretical capacity reaches as high as1402.47 mAh/g. Finally, the electronic conductivity of Li$^{+}$ inside the COF@CNT exceeds that in a pure CNT. The results of this study can provide a theoretical basis for the practical application of these systems.

Key words: covalent organic framework, carbon nanotube, lithium ion, adsorption and transport, molecular simulation

CLC Number: