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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Study of influence of lead foam as negative electrode current collector material on VRLA battery charge performance
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Study of influence of lead foam as negative electrode current collector material on VRLA battery charge performance

机译：泡沫铅作为负极集流体材料对VRLA电池充电性能的影响研究

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摘要

Valve regulated lead acid (VRLA) batteries were prepared by using lead foam and cast grids as the negative electrode current collectors, respectively. Charge discharge cycle tests were carried out at charge rates of I_(10), 2I_(10), and 6I_(10), and a discharge rate of 2h. It was shown that with the same amount of a negative electrode active material, a lead-foam VRLA battery has higher utilization efficiency and capacity than a cast grid VRLA battery, and its charge acceptances (charge discharge factors) at charge rates of I_(10), 2I_(10), and 6I_(10) are 14.1 percent, 22.4 percent, and 45.3 percent higher, respectively, than those of a cast grid VRLA battery. EIS and chronoamperometry tests of both kinds of negative electrodes at charged and discharged states showed that a lead-foam negative electrode has a smaller electrochemical reaction resistance and a larger real surface area than a cast grid one, and the PbSO_4 crystal size is smaller at the discharged state shown by SEM, which makes the charge reaction happen more easily. Therefore, lead foam is in favor of raising the charge acceptance of a VRLA battery.
机译：阀控铅酸（VRLA）电池分别通过使用泡沫铅和浇铸栅作为负极集电器来制备。以I_（10），2I_（10）和6I_（10）的充电速率以及2h的放电速率进行充电放电循环测试。结果表明，使用相同量的负极活性物质，铅泡沫VRLA电池比铸造栅格VRLA电池具有更高的利用率和容量，其充电率I_（10）时的充电接受度（充电放电因子） ），2I_（10）和6I_（10）分别比铸造网格VRLA电池高14.1％，22.4％和45.3％。对两种负极在充电和放电状态下的EIS和计时电流法测试表明，铅泡沫负极的电化学反应电阻较小，且实际表面积比铸栅负极大，并且PbSO_4晶体的尺寸在铸态时较小。 SEM显示放电状态，使电荷反应更容易发生。因此，铅泡沫有利于提高VRLA电池的充电接受度。

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