HBF<sub>4</sub>溶液中全铅液流电池

引用本文: 刘东阳, 程杰, 潘军青, 文越华, 曹高萍, 杨裕生. HBF₄溶液中全铅液流电池[J]. 物理化学学报, 2011, 27(11): 2571-2576. doi: 10.3866/PKU.WHXB20111105 shu

Citation: LIU Dong-Yang, CHENG Jie, PAN Jun-Qing, WEN Yue-Hua, CAO Gao-Ping, YANG Yu-Sheng. All-Lead Redox Flow Battery in a Fluoroboric Acid Electrolyte[J]. Acta Physico-Chimica Sinica, 2011, 27(11): 2571-2576. doi: 10.3866/PKU.WHXB20111105 shu

HBF₄溶液中全铅液流电池

基金项目:
国家重点基础研究发展计划项目(973) (2010CB227204) (973) (2010CB227204)

国家自然科学基金(50804050)资助 (50804050)

摘要: 报道了一种HBF₄水溶液中的全铅液流电池, 正、负电极电解液均采用Pb(BF₄)₂的HBF₄水溶液. 在酸性的四氟硼酸铅电解液中考察了石墨电极和玻碳电极作为工作电极的循环伏安性能, 石墨电极较适于用作全铅液流电池的正、负电极. 采用石墨电极作为电池的正、负电极并在四氟硼酸铅酸性电解液中进行充放电实验, 其中Pb(BF₄)₂浓度分别为0.5、1.0 和1.5 mol·L^-1, 且保持游离的HBF₄浓度为1.0 mol·L^-1. 该电池为单液流电池,不需要隔膜分隔正、负极的电解液, 电流密度为10、20和40 mA×cm^-2, 当限定充电容量为7.0 mAh×cm^-2, 放电电压截止到1.0 V时, 平均库仑效率大于87%, 平均能量效率大于68%; 当电解液采用1.0或1.5 mol·L^-1 Pb(BF₄)₂+1.0 mol·L^-1 HBF₄水溶液时, 在10及20 mA×cm^-2电流下的能量效率最高可超过74%.

关键词:

English

All-Lead Redox Flow Battery in a Fluoroboric Acid Electrolyte

1.
1. College of Science, Beijing University of Chemical Technology, Beijing 100029, P. R. China;
2. Research Institute of Chemical Defence, Beijing 100191, P. R. China
Received Date: 08 June 2011
Available Online: 27 October 2011
Fund Project:
国家重点基础研究发展计划项目(973) (2010CB227204)

国家自然科学基金(50804050)资助

Abstract: An all-lead redox flow battery in a fluoroboric acid electrolyte is proposed. The same electrolyte was used as both the negative and positive electrodes, and it consists of a high concentration solution of Pb(BF₄)₂ in aqueous fluoroboric acid, i.e., 0.1, 0.5, 1.0 and 1.5 mol·L^-1 Pb(BF₄)₂ in 1.0 mol·L^-1 HBF₄. The properties of the graphite and glassy carbon electrodes for both the positive and negative electrodes as current collectors were compared using cyclic voltammetry. We found that the graphite substrate was better than glassy carbon for both the negative electrode and the positive electrode. The all-lead redox flow battery was constructed using graphite substrates as both the positive and negative electrodes with a single electrolyte flow passing though the two electrodes. The performance of the batteries was evaluated using the constant current charge/discharge technique. Typically, an average coulombic efficiency of above 87% and an average energy efficiency of above 68% were obtained. An average energy efficiency of above 74% was achieved with electrolyte containing 1.0 or 1.5 mol·L^-1 Pb(BF₄)₂ + 1.0 mol·L^-1 HBF₄ at current densities of 10 and 20 mA×cm^-2.

Key words:

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

HBF₄溶液中全铅液流电池

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