| Autor: |
Chen, Miao‐Ling, Chen, Yi‐Zhao, Wang, Ling‐Zhi, Cao, Jing‐Ru, Huang, Xing‐Wen, Li, Yue‐Zhu, Wang, Rui‐Bin, Liu, Yi‐Dong, Hu, Jun‐Qi, Liao, Song‐Yi, Min, Yong‐Gang |
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| Zdroj: |
ChemNanoMat; Mar2023, Vol. 9 Issue 3, p1-7, 7p |
| Abstrakt: |
In this work, a hierarchical ZnS‐SnS‐Sb2S3@C (ZTAS@C) submicron box has been successfully prepared via a facile cation‐exchange strategy and is used as advanced anode for Li‐ion batteries. The composition and morphology of the as‐prepared samples are measured by XRD, SEM and TEM, respectively. In addition, the as‐synthesized hollow ZTAS@C architecture delivers a rate capability of 1001, 862, 765, 621, and 419 mAh g−1 at 0.2, 0.5, 1.0, 2.0, and 4.0 A g−1, respectively, and maintains reversible specific capacity of 581 mAh g−1 after 100 cycles at 1.0 A g−1 with the high CE value around almost 100%. Since 1 mol Sb2S3 could hold 4.8 times more Li+ ions than ZnS, the as‐synthesized ZTAS@C delivers 2∼3 times more specific capacity than the un‐treated ZnS‐SnS@C sample without cation‐exchange during electrochemical testing. Moreover, the cycled ZTAS@C could maintain a relatively complete microscopic morphology of the submicron box with a lower electrode expansion rate of ∼131%. Owing to synergistic effects between ZnS‐SnS‐Sb2S3, such as stable structure from ZnS, faster ionic conductivity from SnS and higher capacity from Sb2S3 (theoretically 947 mAh/g), ZTAS@C anode showed excellent electrochemical enhancements as using for LIBs anode. Therefore, the cation exchange strategy should be a facile way to improve the rate performance and cycle stability of multi‐metals sulfide composites. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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