用于硫电池的双功能添加剂,基于金属酸复合物
Zhuzuan Chen1,2, Kang Gan3, Yuehai Peng1
1Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, China.
ACS applied materials & interfaces
|November 22, 2023
概括
一种新的添加剂,甲酸四盐 (Ni-PCTs),有效地捕获和催化聚硫化在硫电池 (LSBs). 这大大提高了LSB的性能,解决了储能方面的关键挑战.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 硫电池 (LSB) 提供高能量密度,但面临诸如聚硫化物穿效应和缓慢的氧化还原动力学等挑战.
- 有效的电极材料对于克服这些局限性和实现工业规模的LSB至关重要.
研究的目的:
- 开发一种双功能添加剂,可以吸附和催化多硫化物 (LiPS),以提高LSB的性能.
- 为了研究甲酸四素酸复合物四盐 (Ni-PCTs) 作为LSB中的添加剂的疗效.
主要方法:
- 合成了一种双功能添加剂,Ni-PCTs,利用硫酸组进行吸附和phthalocyanine环/原子进行催化.
- 将10%重量Ni-PCTs添加剂纳入LSB,并通过循环测试评估其电化学性能.
主要成果:
- 尼-PCT通过硫酸组和通过N和Ni原子的催化转化证明了LiPS的有效捕获.
- 用Ni-PCTs添加剂的LSB显示出高的初始特异容量1283mAhg-1在0.15mA/cm2下.
- 在400个循环后保持了623 mA hg-1的稳定特定容量,这表明循环稳定性得到了改善.
结论:
- 开发的Ni-PCTs添加剂通过减轻穿效应和改善动力学来显著提高硫电池的性能.
- 金属酸作为下一代储能器件中先进的硫阴极的有效添加剂具有前途.
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