In:
Journal of Materials Chemistry A, Royal Society of Chemistry (RSC), Vol. 10, No. 44 ( 2022), p. 23799-23810
Abstract:
Defect engineering is considered an effective strategy to improve the electrochemical performance of batteries because of its ability to promote ion diffusion and increase reactive sites in electrode materials. Twin boundaries as interfacial defects offer new opportunities for ion transport in nanomaterials. In this work, Cd x Zn 1− x S with twin boundaries (Cd x Zn 1− x S-B) was designed and fabricated based on the theories of crystal structure analysis and density functional theory (DFT) calculations. We demonstrate that the introduction of Zn into CdS to form Cd x Zn 1− x S-B enables fast lithium-ion diffusion and enhances structural stability. Its reversible specific capacity is approximately four times that of its corresponding single metal sulfide electrode and the cycle stability is significantly better than that of Cd x Zn 1− x S without twin boundaries. Notably, Cd 0.7 Zn 0.3 S-B delivers a high specific capacity of 404.8 mA h g −1 at 2.0 A g −1 after 1900 cycles, and the Cd 0.7 Zn 0.3 S-B||LiFePO 4 full cell maintained a capacity retention of 84.3% after 150 cycles at 500 mA g −1 . Cd 0.7 Zn 0.3 S-B also shows excellent sodium storage performance. This study demonstrates that designing electrode materials via introducing twin boundaries can promote the development of next generation rechargeable batteries.
Type of Medium:
Online Resource
ISSN:
2050-7488
,
2050-7496
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2022
detail.hit.zdb_id:
2702232-8
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