简单且具有成本效益的NiO/MgO-SiO2复合材料,用于高效的氧气演化反应和不对称的超级电容系统
Gulzar Ali1, Aneela Tahira2, Asma Hayat1
1Institute of Chemistry, University of Sindh Jamshoro 76080 Pakistan gulzaralichemist@gmail.com asmabaloch141617@gmail.com zaffar.ibhupoto@usindh.edu.pk.
RSC advances
|March 7, 2025
概括
葡萄皮废物被转化为用于电催化和储能的NiO/MgO-SiO2复合材料. 最好的复合材料在超级电容器和氧气演变反应中表现出极好的稳定性和性能.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 绿色化学 绿色化学
背景情况:
- 生物质废弃物为先进材料合成提供了一个可持续的来源.
- 开发高效的电催化剂和储能材料对于可再生能源技术至关重要.
研究的目的:
- 使用葡萄皮生物质废物合成新的NiO/MgO-SiO2复合物.
- 评估这些复合材料在氧化演化反应 (OER) 和不对称超级电容器 (ASC) 的电化学性能.
主要方法:
- MgO-SiO2复合物是从葡萄皮提取物中*in situ*制备的.
- 被沉积在MgO-SiO2上,使用修改后的热水法.
- 在OER和ASC设备的KOH溶液中研究了电化学特性.
主要成果:
- 具有最高MgO-SiO2含量的NiO/MgO-SiO2复合物 (样本3) 显示出OER在10 mA cm-2处的230 mV的低超电位,在40小时内具有出色的稳定性.
- 使用样本3制造的ASC设备的特定电容量为344.12 Fg-1,能量密度为7.31 Wh kg-1.
- 在4万个充放电周期后,ASC装置保持了88.9%的电容.
结论:
- 葡萄皮提取物是合成高性能NiO/MgO-SiO2电催化和储能材料的可行前体.
- 开发的NiO/MgO-SiO2复合材料显示出在能源转换和储能装置中的应用潜力很大.
- 这项研究强调了农业废弃物的成功利用,使其成为功能性纳米材料.
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