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Zhang T, Wei F, Wu Y, Li W, Huang L, Fu J, Jing C, Cheng J, Liu S. Polyoxometalate-Bridged Synthesis of Superstructured Mesoporous Polymers and Their Derivatives for Sodium-Iodine Batteries. Adv Sci (Weinh) 2023:e2301918. [PMID: 37098637 DOI: 10.1002/advs.202301918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Indexed: 06/19/2023]
Abstract
Despite the impressive progress in mesoporous materials over past decades, for those precursors having no well-matched interactions with soft templates, there are still obstacles to be guided for mesoporous structure via soft-template strategies. Here, a polyoxometalate-assisted co-assembly route is proposed for controllable construction of superstructured mesoporous materials by introducing polyoxometalates as bifunctional bridge units, which weakens the self-nucleation tendency of the precursor through coordination interactions and simultaneously connects the template through the induced dipole-dipole interaction. By this strategy, a series of meso-structured polymers, featuring highly open radial mesopores and dendritic pore walls composed of continuous interwoven nanosheets can be facilely obtained. Further carbonization gave rise to nitrogen-doped hierarchical mesoporous carbon decorated uniformly with ultrafine γ-Mo2 N nanoparticles. Density functional theory proves that nitrogen-doped carbon and γ-Mo2 N can strongly adsorb polyiodide ions, which effectively alleviate polyiodide dissolving in organic electrolytes. Thereby, as the cathode materials for sodium-iodine batteries, the I2 -loaded carbonaceous composite shows a high specific capacity (235 mA h g-1 at 0.5 A g-1 ), excellent rate performance, and cycle stability. This work will open a new venue for controllable synthesis of new hierarchical mesoporous functional materials, and thus promote their applications toward diverse fields.
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Affiliation(s)
- Tingting Zhang
- State Key Laboratory of Precision Spectroscopy, Engineering Research Center of Nanophotonics and Advanced Instrument, Ministry of Education, School of Physics and Electronic Science, East China Normal University, Shanghai, 200241, P. R. China
| | - Facai Wei
- State Key Laboratory of Precision Spectroscopy, Engineering Research Center of Nanophotonics and Advanced Instrument, Ministry of Education, School of Physics and Electronic Science, East China Normal University, Shanghai, 200241, P. R. China
| | - Yong Wu
- State Key Laboratory of Precision Spectroscopy, Engineering Research Center of Nanophotonics and Advanced Instrument, Ministry of Education, School of Physics and Electronic Science, East China Normal University, Shanghai, 200241, P. R. China
| | - Wenda Li
- State Key Laboratory of Precision Spectroscopy, Engineering Research Center of Nanophotonics and Advanced Instrument, Ministry of Education, School of Physics and Electronic Science, East China Normal University, Shanghai, 200241, P. R. China
| | - Lingyan Huang
- State Key Laboratory of Precision Spectroscopy, Engineering Research Center of Nanophotonics and Advanced Instrument, Ministry of Education, School of Physics and Electronic Science, East China Normal University, Shanghai, 200241, P. R. China
| | - Jianwei Fu
- School of Materials Science and Engineering, Zhengzhou University, 75 Daxue Road, Zhengzhou, 450052, P. R. China
| | - Chengbin Jing
- State Key Laboratory of Precision Spectroscopy, Engineering Research Center of Nanophotonics and Advanced Instrument, Ministry of Education, School of Physics and Electronic Science, East China Normal University, Shanghai, 200241, P. R. China
| | - Jiangong Cheng
- State Key Lab of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, 200050, Shanghai, P. R. China
| | - Shaohua Liu
- State Key Laboratory of Precision Spectroscopy, Engineering Research Center of Nanophotonics and Advanced Instrument, Ministry of Education, School of Physics and Electronic Science, East China Normal University, Shanghai, 200241, P. R. China
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