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异构促进的氧气电催化使得可充电的空气电池具有中性水性电解质
Li An1, Zhiyong Zhang2, Jianrui Feng3
1State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, and College of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou , 730000 , People's Republic of China.
Journal of the American Chemical Society
|November 8, 2018
概括
研究人员开发了用于中性水性空气电池的NiFe2O4/FeNi2S4异构纳米板. 这种先进的催化剂增强了氧气反应,
科学领域:
- 材料科学
- 电化学
- 能量储存
背景情况:
- 中性水性空气电池 (ZAB) 提供了比性版本更长的寿命和可回收性.
- 对于中性ZAB来说,一个关键的挑战是缺乏有效的氧化演化 (OER) 和氧化减少 (ORR) 的双功能催化剂.
研究的目的:
- 合成和评估NiFe2O4/FeNi2S4异构纳米板 (HNS) 作为中性可充电ZAB的强大的双功能催化剂.
- 研究氧化物/硫化物接口在增强电催化活性中的作用.
主要方法:
- 控制 NiFe2O4/FeNi2S4 HNS 的合成.
- 在中性电解质中对OER和ORR活性和稳定性的电化学表征.
- 密度函数理论 (DFT) 计算以了解电子结构和氧结合能量.
- 使用合成催化剂的ZAB的性能测试.
主要成果:
- 与单组分催化剂相比,NiFe2O4/FeNi2S4 HNS表现出更高的OER和ORR活性.
- 催化剂表现出极好的稳定性,在加快耐久性测试中性能衰减是可以忽略的.
- 采用HNS的ZAB实现了高功率密度为44.4mW cm-2和显著的循环稳定性 (在900个循环后衰减0.6%).
结论:
- NiFe2O4/FeNi2S4 HNS是中性可充电ZAB的高效双功能电催化剂.
- 异构接口在调节氧结合能量和增强催化性能方面发挥着至关重要的作用.
- 这项工作为开发先进的高性能中性金属空气电池提供了有前途的途径.
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