期刊
ENERGY STORAGE MATERIALS
卷 10, 期 -, 页码 122-129出版社
ELSEVIER
DOI: 10.1016/j.ensm.2017.08.011
关键词
Top-down synthesis; Carbon nanosheets; Sb nanoparticles; Sodium-ion batteries; Multi-dimensional structure
资金
- National Key R&D Program of China [2016YFB0100305]
- Sofja Kovalevskaja award of the Alexander von Humboldt Foundation
- National Natural Science Foundation of China [21373195, 51622210]
- Fundamental Research Funds for the Central Universities [WK3430000004]
- Collaborative Innovation Center of Suzhou Nano Science and Technology
- ARC DECRA Grant [DE170101426]
- Australian Research Council [DE170101426] Funding Source: Australian Research Council
Nanoparticle-based electrode materials have sparked enormous excitement in the sodium-ion battery community because of potentially fast transport kinetics. However, they may suffer from many challenging static and dynamic problems, such as agglomeration of nanoparticles, high contact resistance, volume change, and instability of solid electrolyte interphase. Herein, we develop inter-connected 2D carbon nanosheets in which ultrasmall 0D Sb nanodots are embedded homogenously through a previously unexplored top-down strategy. Starting from the laminar structure K3Sb3P2O14, H3Sb3P2O14 nanosheets are exfoliated by ion exchange and then serve as templates for the synthesis of carbon sheets and Sb nanodots. Such combination of multi-dimensional and multi- scale nanostructures in the electrode materials lead to excellent electron/ion transport kinetics and pronounced integrity of the electrode structure on cycling, providing a promising pathway for developing advanced electrode materials in terms of reversibility, rate capability and cycle life.
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