التفاصيل البيبلوغرافية
| العنوان: |
Optimization of SbBix nanoparticles embedded in ultra-thin carbon networks for enhanced sodium/potassium storage. |
| المؤلفون: |
Lin, Qingxin1,2 (AUTHOR), Qin, Jian1,2,3 (AUTHOR) qinjian@xaut.edu.cn, Cao, Yanyan1,2 (AUTHOR), Li, Xiaokang1,2 (AUTHOR), Hong, Yan1,2 (AUTHOR), Jin, Meichen1,2 (AUTHOR), Dong, Jinjuan1,2 (AUTHOR), Xiao, Wei1,2 (AUTHOR), Li, Wenbin1,2 (AUTHOR), Wang, Jingjing1,2 (AUTHOR), Li, Xifei1,2 (AUTHOR) xfli@xaut.edu.cn |
| المصدر: |
Chemical Engineering Journal. Oct2023, Vol. 474, pN.PAG-N.PAG. 1p. |
| مصطلحات موضوعية: |
*SODIUM, *POTASSIUM, *DENSITY functional theory, *SURFACE states, *NANOPARTICLES, *ENERGY storage |
| مستخلص: |
• SbBi x nanoparticles embedded in ultra-thin carbon networks are designed. • SbBi x @C exhibits excellent performance in both sodium and potassium storage. • The influence of proportion in SbBi x on energy storage behavior is revealed. • SEI composition and particle surface states play an important role in energy storage. The alloy proportions of SbBi x show obvious influence on sodium/potassium storage. Herein, SbBi x nanoparticles embedded in ultra-thin carbon networks (SbBi x @C, x = 1, 0.5, 0.15) are successfully synthesized by a facile salt template assisted pyrolysis method. The effect of different alloy proportions on the chemical and electrochemical properties of active materials is revealed. Density functional theory calculation demonstrates that SbBi 0.5 has the smallest formation energy (−5.131 eV) and the smallest volume expansion rate for both sodium/potassium storage (222%/376%). Benefiting from the optimized volume expansion for both sodium/potassium storage and carbon networks structure, the optimized SbBi 0.5 @C anode shows high reversible capacities of 301 mAh/g and 390 mAh/g after 100 cycles at 0.1 A/g for sodium/potassium storage, respectively. It is also observed that the SbBi 0.5 @C anode delivers different behaviours of sodium/potassium storage, which is due to the various composition of SEI films formed after sodium/potassium storage. It is believed that this work provides a synthetic strategy for fabricating alloy-type anode materials for SIBs/PIBs, in view of structure design and the regulation of alloy proportion. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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