化与有序的阴位空缺,用于高效的氧气减排和耐冷的Al-air电池
Jianxue Liu1,2, Chao Zhang1, Chen Xu3
1Aerospace Research Institute of Materials & Processing Technology, Beijing, 100076, China. ljx1654060931@foxmail.com.
Nanoscale
|June 9, 2023
概括
开发高效的电催化剂对于在极寒条件下运行的空气电池至关重要. 六边形Co0.85Se装饰的N,Se联合合的碳纳米纤维显示出显著的氧降解反应活性,使电池在-40°C下起作用.
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:
- 空气电池面临着缓慢的氧气减少反应的挑战,限制了在寒冷环境中的性能.
- 需要高效的电催化剂,以便在极端天气条件下实现气电池应用.
研究的目的:
- 为了合成和评估气电池的新型电催化剂.
- 为了改善氧气还原反应动力学和空气电池的低温性能.
主要方法:
- 通过电ZIF-67纳米立方体的碳化/化合成六边形Co0.85Se装饰的N,Se联合合的碳纳米纤维 (Co0.85Se@N,Se-CNFs).
- 合成材料的结构和电化学性能的表征.
- 测试由此产生的空气电池在温度范围 (-40-50°C) 的性能.
主要成果:
- 合成的Co0.85Se@N,Se-CNFs表现出优异的氧降解反应活性,具有高发起 (0.93V) 和半波 (0.87V与RHE) 潜力.
- 使用这些电催化剂的空气电池在-40°C至50°C的温度下表现出卓越的性能.
- 在-40°C时,电池达到0.15-1.2V的电压,峰值功率密度约为0.7mW cm-2.2.
结论:
- 六边形Co0.85Se装饰的N,Se联合合的碳纳米纤维是空气电池的有效电催化剂.
- 开发的材料显著提高了极端寒冷条件下的电池性能.
- 这种催化剂设计对储能系统中的更广泛应用具有前景.
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