Polymer Stabilized Droplet Templating towards Tunable Hierarchical Porosity in Single Crystalline Na3V2(PO4)3 for Enhanced Sodium‐Ion Storage. Issue 18 (17th March 2021)

• Record Type: Journal Article
• Authors: Xiong, Hailong; Sun, Ge; Liu, Zhilin; Zhang, Ling; Li, Lin; Zhang, Wei; Du, Fei; Qiao, Zhen‐An
• Is Part Of: Angewandte Chemie international edition. Volume 60:Issue 18(2021)
• Page Start: 10334
• Page End: 10341
• Publication Date: 2021-03-17
• Subjects: droplet template -- Na3V2(PO4)3 -- porous structure -- single crystals -- sodium-ion batteries; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.202100954
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: Na3 V2 (PO4 )3 (NVP) is regarded as a potential cathode material for sodium‐ion batteries, whereas, its performance is usually limited by inherent low electronic conductivity and dense bulk structure. Herein, we develop a facile polymer stabilized droplet template strategy to synthesize porous single crystal structured NVP. The pore structures (macrostructures, hierarchically meso/macrostructures, and mesostructures), pore sizes (5–2000 nm), and specific surface areas (26–158 m 2 g −1 ) of the samples can be readily controlled by tuning the sizes of droplet templates. The resultant hierarchically meso/macropores NVP demonstrates superior sodium storage performances, because its porous single crystal structure owns solid–liquid Na + transmission mode, shortens ion diffusion distance and provides large electrode–electrolyte contact area, greatly facilitating fast ionic transport. We believe the presented method will supply a novel avenue to prepare porous single crystal structured materials for anticipative applications. Abstract : A facile polymer stabilized droplet template strategy allows the synthesis of porous single crystal structured NVP with tunable pore structure. The resultant hierarchically meso/macropores NVP demonstrates superior sodium storage performances, because its porous single crystal structure shortens ion diffusion distance and provides large electrode–electrolyte contact area, greatly facilitating fast ionic transport.