Journal
ELECTROCHIMICA ACTA
Volume 296, Issue -, Pages 582-589Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2018.11.059
Keywords
ZnSe nanoparticles; Nitrogen-doped carbon; Hybrid structures; Anode; Sodium-ion batteries
Categories
Funding
- National Natural Science Fund of China [21871164]
- China Postdoctoral Science Foundation [2017M610419]
- Special Fund for Postdoctoral of China [2018T110680]
- Special Fund for Postdoctoral Innovation Program of Shandong Province [201701003]
- Fundamental Research Funds of Xinjiang Institute of Engineering for PhD [2013BQT051607]
- Taishan Scholar Project of Shandong Province [ts201511004]
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Sodium-ion batteries (SIBs) have drawn great attentions due to the abundance of sodium and their similar electrochemical principles to that of lithium-ion batteries. However, larger ionic radius of Na+ greatly retards Na+ transport and causes severe volume expansion. Therefore, delicate design of anodes for SIBs that can reversibly accommodate sodium ions is a crucial, but challenging task. In this paper, we rationally engineer a hybrid composite featured with ZnSe nanoparticles uniformly wrapped in three-dimensional (3D) porous nitrogen-doped carbon matrix (ZnSe NP@p-NC). The synthesis is achieved through the domination of the self-template-induced reaction between Zn-based zeolitic imidazolate framework (ZIF-8) nanododecahedra and Se powder at an elevated temperature. Due to the structural and compositional merits, including a 3D porous structure, the uniform distribution of the small-size ZnSe nanoparticles, and graphitic carbon matrix, these unique ZnSe NP@p-NC popcorn balls display a high sodium-storage performance, including cycling stability (181.7 mAh g(-1) after 2000 cycles at 10 A g(-1)), rate capability, and initial Coulombic efficiency. (C) 2018 Elsevier Ltd. All rights reserved.
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