基于氧化还原靶向的锂硫液流电池的设计组装与性能评价

来源 :第三届全国新能源与化工新材料学术会议暨全国能量转换与存储材料学术研讨会 | 被引量 : 0次 | 上传用户:sweetorange888
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  液流电池是一种重要的大型电化学储能装置.由于能量储存和功率输出彼此独立,且具有结构简单、储能规模大、循环寿命长及安全性能高等优点,因此液流电池既可以作为新能源发电过程中的储能装置,还可以作为电网调峰的大规模储能装置.比较成功的主要有全钒液流电池,但面临着高成本、低能量密度的考验.Michael Gr(a)tzel教授首次引入氧化还原电对,靶向对接磷酸亚铁锂正极材料,可以有效克服电极材料导电性差的问题,同时呈现出锂离子高比容量和高能量密度的特点[1],其中合适的氧化还原电对是关键因素.我们利用氧化还原靶向原则,选取比容量更高、价格低廉、导电性差的S粉作为靶向对接材料,通过大量筛选可能的活性电对,最终选取Ni(Cp*)2/Cr(Cp*)2 [2]、EtV(Ⅱ)/EtV(0) [3]作为活性电对,首次成功实现了氧化还原靶向的锂硫液硫电池的设计组装与性能评价,可望有效解决储能型电池能量密度低、能量转换效率差的问题,为大型储能型锂硫液流电池的研究、推广及应用奠定了基础,展现了大型储能电池的优异发展前景.
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