草酸浓度调控对水系锌离子电池正极材料NH_4V_4O<sub>10</sub>合成的优化(英文)

蔺何; 刘晨帆; 张禹

doi:10.13568/j.cnki.651094.651316.2023.10.03.0002

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草酸浓度调控对水系锌离子电池正极材料NH_4V_4O₁₀合成的优化(英文)

更新时间：2026-01-21

- 草酸浓度调控对水系锌离子电池正极材料NH_4V_4O₁₀合成的优化(英文)
- Journal of Xinjiang University (Natural Science Edition in Chinese and English) Vol. 41, Issue 4, Pages: 427-434(2024)
- 作者机构：
  
  新疆大学化学学院省部共建碳基能源资源化学与利用国家重点实验室
- 作者简介：
- 基金信息：
- DOI：10.13568/j.cnki.651094.651316.2023.10.03.0002
  CLC： TQ113.7;TM912
- Published：2024
- 稿件说明：
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[1]蔺何,刘晨帆,张禹.草酸浓度调控对水系锌离子电池正极材料NH_4V_4O_(10)合成的优化（英文）[J].新疆大学学报(自然科学版中英文),2024,41(04):427-434.
[1]蔺何,刘晨帆,张禹.草酸浓度调控对水系锌离子电池正极材料NH_4V_4O_(10)合成的优化（英文）[J].新疆大学学报(自然科学版中英文),2024,41(04):427-434. DOI： 10.13568/j.cnki.651094.651316.2023.10.03.0002.

DOI：10.13568/j.cnki.651094.651316.2023.10.03.0002.

摘要

采用一步水热法，调整不同的草酸含量制备了NH_4V_4O10(NVO)样品，并研究其作为水系锌离子电池正极材料的电化学性能．实验发现：草酸的浓度在决定样品组成上起到了关键性作用．当浓度较低时，得到NVO和(NH4)_2V_4O9的混合相；草酸浓度过高则会导致VO2的生成．当偏钒酸铵与草酸的摩尔比保持在1:1时，成功合成了纯相NVO．电化学测试结果表明：纯相NVO在0.2 A·g-1的电流密度下，比容量达到了479.3 mAh·g-1，性能显著优于其它样品．此外，该材料在0.1 mV·s-1的扫描速率下，赝电容贡献率高达82.48%.

Abstract

Using one-step hydrothermal method and adjusting the content of oxalic acid

NH_4V_4O10(NVO) samples were prepared

and their electrochemical properties as potential cathode materials for aqueous zinc-ion batteries were studied. The concentration of oxalic acid played a pivotal role in determining the resultant phase of the product. At lower concentrations

a mix of NVO and (NH4)_2V_4O9 phases emerged

while an excess of oxalic acid led to the formation of VO2. A balanced ammonium metavanadate and oxalic acid ratio of 1:1 produced a pure NVO phase. Electrochemical analyses highlighted that this singlephase NVO demonstrated a remarkable specific capacity of 479.3 m Ah·g-1 at 0.2 A·g-1

outperforming other compositions.Moreover

the material showcased a high pseudo capacitive contribution rate of 82.48% at 0.1 mV·s-1.

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references

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草酸浓度调控对水系锌离子电池正极材料NH_4V_4O10合成的优化(英文)

DOI：10.13568/j.cnki.651094.651316.2023.10.03.0002

摘要

Abstract

关键词

Keywords

references

草酸浓度调控对水系锌离子电池正极材料NH_4V_4O₁₀合成的优化(英文)