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通过使用降铁细菌来改善中性全铁流电池的电化学特性和性能

Sitao Li¹, Xinyuan Peng², Decong Zheng¹

¹Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Science, Chengdu 610041, China; University of Chinese Academy of Sciences, Beijing 100049, China.

Bioelectrochemistry (Amsterdam, Netherlands)

|February 1, 2024

概括

减少铁的细菌 (FeRB) 通过增加充电能力和电流密度来增强全铁氧化还原流电池 (RFB). 像Alcaligenes这样的特定FeRB菌株显示出改善RFB性能的巨大潜力.

科学领域:

电化学电化学电化学
微生物学微生物学
储能储能储能储能储能储能

背景情况:

全铁氧化还原流电池 (RFB) 由于可访问的电解质,提供了潜在的电解质.
电活性细菌在提高RFB性能方面的作用在很大程度上被忽视了.
之前的研究证实铁氧化细菌 (FeOB) 可以提高全铁RFB的性能.

研究的目的:

为了研究降铁细菌 (FeRB) 和混合微生物培养对Fe3+-DTPA/Na4[Fe(CN) [6] RFBs的影响.
为了确定FeRB或混合培养是否与FeOB相比提供同等或更高的性能增强.
为了确定关键的微生物物种,负责提高全铁RFB的性能.

主要方法:

采用了批量实验和时间电位计.
电化学阻抗光谱 (EIS) 和循环电压计 (CV) 用于电化学分析.
扫描电子显微镜 (SEM) 和微生物组成分析进行.

主要成果:

使用FeRB或混合培养的实验反应器表现出更高的充电电流密度和初始阴极潜力.
EIS和CV数据显示极化阻抗增速较慢,降低峰值潜力的转变为正值.
观察到微生物功能高达0.3M和12mA/cm2,并改善了充电特定容量.

结论:

减少铁的细菌 (FeRB),特别是Alcaligenes,Corynebacterium和Bacillus,显著提高了全铁RFB的性能.
这些电活性微生物显示出提高铁基RFB的效率和容量的重要潜力.
这些发现为微生物辅助的储能系统开辟了新的途径.

关键词:

全铁氧化还原流电池是全铁氧化还原流电池.通过细菌介导的铁还原.铁还原细菌是一种减少铁的细菌.微生物电催化剂的微生物电催化新型的清洁能源储存.

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