和三甲聚离子:非水性氧流电池应用的合成,特征和电化学评估
Julia M Stauber1, Shiyu Zhang1, Nataliya Gvozdik2
1Department of Chemistry, Massachusetts Institute of Technology , Cambridge, Massachusetts 02139, United States.
Journal of the American Chemical Society
|December 13, 2017
概括
一个新的和二甲流电池实现了2.4V和超过90%的效率100个周期. 这表明了有前途的非水性氧化还原流电池电解质,用于未来的能量储存.
科学领域:
- 电化学
- 材料科学
- 能量储存
背景情况:
- 开发稳定和高效的电解质对于推进非水性氧化还原流电池 (NaRFB) 是至关重要的.
- 过渡金属复合物为电池应用提供可调节的氧化还原特性.
- 甲酸对金属离子具有独特的协调环境.
研究的目的:
- 使用和二甲复合物构建和评估电化学电池.
- 调查这些复合物的适用性作为NaRFB中的阴解质和阳解质材料.
- 描述合成复合物的氧化还原特性,稳定性和可溶性.
主要方法:
- 使用 ([CoII/III(P3O9) 2[4-/3-) 和 ([VIII/II(P3O9) 23-/4-) 的电化学电池结构复合物.
- 循环电量测量和静电循环测量以评估细胞的性能和稳定性.
- 用于结构分析的光谱表征 (31P NMR,UV/vis,ESI-MS(-),IR) 和X射线晶体.
- 旋转交叉 (SCO) 复合物的分离和特征.
主要成果:
- 一个电化学电池具有2.4V电池电压和超过90%的库伦比效率超过100个周期.
- 和复合物表现出可逆的氧化还原化学,高电化学稳定性,以及在乙中优异的溶解性.
- 分离的晶体盐 ([PPN]4[1]·2MeCN和[PPN]3[2]·DME) 进行了表征,并提供了复合物的结构数据.
- 一个自旋交叉复合物,活性催化剂物种,已成功分离.
结论:
- 和二甲复合物是NaRFB电解质的有希望的候选物.
- 证明的细胞性能突显了基于过渡金属酸盐的系统的潜力.
- 这项工作为开发全无机非水性氧化还原流电池电解质开辟了道路.
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