可充电 Na-S 电池的单原子工程电极
Erhuan Zhang1, Xiang Hu2, Lingzhe Meng3
1Department of Chemistry, Tsinghua University, Beijing 100084, China.
Journal of the American Chemical Society
|October 10, 2022
概括
研究人员使用原子开发了一种新的硫 (Na-S) 电池. 这项创新提高了能源密度和耐用性,克服了先进能源存储解决方案的关键挑战.
科学领域:
- 材料科学
- 电化学
- 能量储存
背景情况:
- 可充电-硫 (Na-S) 电池具有高能量密度和低成本,但存在多硫化物和树问题.
- 硫种缓慢的氧化还原动力阻碍了Na-S电池的高效电化学转化.
研究的目的:
- 通过设计用于阳极和硫阴极的新型主体材料来解决Na-S电池的局限性.
- 研究 (Y) -N4单原子位点作为改善Na-S电池性能的Janus催化剂的潜力.
主要方法:
- 使用金属有机框架 (MOF) 合成含单个原子 (Y SAs/NC) 的化碳宿主.
- 以其"Janus"特性,特别是性和硫性,为Y SAs/NC材料的特征.
- 使用Y SAs/NC作为电极主体材料组装和测试Na-S全细胞.
主要成果:
- 在Na-S全电池中,Y SAs/NC材料表现出优异的电化学性能.
- 达到822mAhg-1的高容量,具有显著的循环性,在5Ag-1的1000个循环中保持97.5%的容量.
- 概念验证3D打印电池和袋式电池验证了开发的Na-S技术的实用性.
结论:
- 在添加碳主体中加入的Y单原子位点有效地减轻了多硫化物和树问题.
- 开发的Y SAs/NC材料显示出对用于储能应用的高性能和耐用Na-S电池的重大前景.
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