Study on solution combustion synthesis and electrochemical performance of V2O5–Cu as cathode materials for aqueous zinc-ion batteries.
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| Title: | Study on solution combustion synthesis and electrochemical performance of V |
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| Authors: | Ma, Jidong1 (AUTHOR) majidong@xmut.edu.cn, Gu, Xinya1 (AUTHOR), Du, Kai1 (AUTHOR), Zhou, Wenjun1 (AUTHOR), Cui, Jian1 (AUTHOR), Gu, Siyong1 (AUTHOR), Zhang, Houan1 (AUTHOR) |
| Source: | Journal of Materials Science: Materials in Electronics. Nov2024, Vol. 35 Issue 33, p1-10. 10p. |
| Abstract: | Aqueous zinc-ion batteries (AZIBs) are widely regarded as a highly potential alternative power source, chiefly owing to the superior safety characteristics. Vanadium-based compounds, especially V2O5 cathode materials, have been widely studied due to the advantages of suitable working voltage windows and highly reversible redox reactions. Nevertheless, the inadequate conductivity of V2O5 and its intrinsic structural instability have hindered its utility in AZIBs. This study introduces a straightforward one-step solution combustion method for synthesizing copper-ion-doped V2O5, aimed at enhancing its structural robustness and electrochemical efficacy. The modified material resulted in expanded interlayer spacing, increased ionic diffusion rate, higher concentration of low-valence vanadium and oxygen vacancies, consequently enhancing electron mobility and facilitating electrochemical reactions. This enhancement led to an increased discharge specific capacity of the material. When V2O5–Cu is employed as the cathode material in aqueous zinc-ion batteries, it achieves a discharge specific capacity of up to 300 mAh g−1 at a current density of 4 A g−1. Moreover, after 500 cycles, the battery retains approximately 95% of its initial capacity. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| Abstract: | Aqueous zinc-ion batteries (AZIBs) are widely regarded as a highly potential alternative power source, chiefly owing to the superior safety characteristics. Vanadium-based compounds, especially V2O5 cathode materials, have been widely studied due to the advantages of suitable working voltage windows and highly reversible redox reactions. Nevertheless, the inadequate conductivity of V2O5 and its intrinsic structural instability have hindered its utility in AZIBs. This study introduces a straightforward one-step solution combustion method for synthesizing copper-ion-doped V2O5, aimed at enhancing its structural robustness and electrochemical efficacy. The modified material resulted in expanded interlayer spacing, increased ionic diffusion rate, higher concentration of low-valence vanadium and oxygen vacancies, consequently enhancing electron mobility and facilitating electrochemical reactions. This enhancement led to an increased discharge specific capacity of the material. When V2O5–Cu is employed as the cathode material in aqueous zinc-ion batteries, it achieves a discharge specific capacity of up to 300 mAh g−1 at a current density of 4 A g−1. Moreover, after 500 cycles, the battery retains approximately 95% of its initial capacity. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 09574522 |
| DOI: | 10.1007/s10854-024-13892-8 |
