用BaMnO合的LiAlH4的脱性能得到改善3
N A Sazelee1, Sami-Ullah Rather2, A M Sinin3
1Energy Storage Research Group, Faculty of Ocean Engineering Technology, Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia.
氧化 (BaMnO3) 添加剂显著改善化 (LiAlH4) 的储. 复合材料显示较低的分解温度和增强的释放动力学,使其更实用于车载应用.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 储能 储能 储能 储能 储能 储能
背景情况:
- 化 (LiAlH4) 是一个有前途的固态存材料,因为它具有高的重力度容量 (10.5%).
- 然而,其实际应用受到高分解温度,缓慢的动力学和低可逆性的限制.
研究的目的:
- 通过将二氧化氧化物 (BaMnO3) 作为添加剂来增强LiAlH4的储特性.
- 调查BaMnO3对LiAlH4.4分解温度,脱动力学和容量的影响.
主要方法:
- 合成了具有不同重量百分比BaMnO3的LiAlH4复合物.
- 使用热重力测量分析 (TGA) 和异热溶解试验分析了溶解特性.
- 使用X射线衍射 (XRD) 来描述复合材料的特征.
主要成果:
- 添加BaMnO3显著降低了LiAlH4的释放起始温度,达到109-115°C.
- 复合物在90°C时表现出更快的脱吸动力学,并释放了2.00-2.60重量%的H2,而纯LiAlH4.4的<1.00重量%相比.
- 减少了30kJ/mol (第一阶段) 和34kJ/mol (第二阶段) 的脱吸的激活能量.
结论:
- BaMnO3 有效地改善了LiAlH4.4的溶解特性.
- 增强的性能归因于活性物种的形成,如MnO2和含有Ba的材料.
- 这种经过修改的LiAlH4复合物显示出实际的机载储存应用的潜力.
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