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- Title
Controllable Preparation and Sodium Storage Properties of Sb2Te3–Te Heterojunction.
- Authors
Jia, Shupei; Jiang, Sheng; Li, Saisai; Liu, Peng; Wang, Feng; Wang, Dianhui; Liu, Wenping; Qin, Haiqing; Deng, Jianqiu
- Abstract
Antimony-based materials possess high theoretical capacities and suitable potential, which could be promising anode materials for sodium-ion batteries (SIB). However, poor stabilities and sluggish kinetics are drawbacks. Building heterojunction is an ideal method to solve these issues. Its unique structure develops internal electric fields spontaneously to boost the charge transport and relieve stress. Nevertheless, the controllable preparation of face-to-face (2D) heterojunctions is still hard-pressed. Herein, Sb 2 Te 3 – Te nanoheterojunctions, which consist of two-dimensional Sb 2 Te 3 – Te nanoblades attached to a one-dimensional Te nanorod, are fabricated through a two-step solvothermal method. Among that, the density of nanoblades is adjustable through the engineering feed ratio. When employed as anodes for SIBs, Sb 2 Te 3 – Te nanoheterojunctions display a reversible capacity of 463.2 mAh g − 1 at 100 mA g − 1 . Even a capacity of 305.5 mAh g − 1 remains after 1000 cycles under a high current of 1.5 A g − 1 . Moreover, the density functional theory (DFT) calculations also identify the high conductivity of heterojunction. This work offers an effective way to design the structures and properties of heterojunctions, further expanding their application range. Heterojunctions are capable of developing internal electric fields which can enhance charge transport and relieve stress. In this study, face-to-face Sb-Te heterojunctions were created using a two-step solvothermal reaction. These heterojunctions are composed of nanorods and integrated nanosheets. The morphology of the heterojunctions can be adjusted by manipulating the feed ratio of precursors. The synthesized heterojunctions exhibited impressive rate performance and cycling stability when used as anodes in sodium-ion batteries.
- Subjects
HETEROJUNCTIONS; DENSITY functional theory; SODIUM; ELECTRIC fields; NANORODS
- Publication
NANO, 2024, Vol 19, Issue 5, p1
- ISSN
1793-2920
- Publication type
Article
- DOI
10.1142/S1793292024500292