Hetero-interface constructs ion reservoir to enhance conversion reaction kinetics for sodium/lithium storage
| Autor: | Mi Yan, Yinzhu Jiang, Yunhao Lu, Naoufal Bahlawane, Wenhao Guan, Peng Zhou, Wenping Sun, Chu Liang, Libin Fang, Zhenyun Lan |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Sodium Diffusion Kinetics Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences 0104 chemical sciences Anode Ion Chemical kinetics chemistry Chemical engineering General Materials Science Lithium 0210 nano-technology |
| Zdroj: | Energy Storage Materials. 18:107-113 |
| ISSN: | 2405-8297 |
| DOI: | 10.1016/j.ensm.2018.10.002 |
| Popis: | Developing high-capacity electrode materials is most vital to high-energy rechargeable batteries. The conversion reaction-based anode materials deliver substantially higher theoretical capacities in respect to intercalation-based materials. However, the sluggish conversion reaction kinetics is a big obstacle to deliver high practical capacity and rate capability, which is particularly severe for sodium storage. Herein, we implement an interface engineering approach by designing hetero-interfaces to enhance conversion reaction. As a proof of concept, Sb2S3-SnS2 hetero-nanostructures are synthesized and show greatly improved electrochemical performance in terms of specific capacity and rate capability. The DFT calculations reveal that the hetero-interfacial electric field prompts sodium ions pump into the interfaces, which greatly reduces the activation barrier and hence accelerates reaction kinetics. The Sb2S3-SnS2 hetero-interface serves therefore as a “reservoir” and fast diffusion channel for sodium or lithium ions. The obtained results provide important insights into engineering efficient hetero-nanostructures towards fast conversion reaction kinetics for rechargeable batteries. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect