不同温度下铅酸电池负极特性研究

Study on the negative electrode characteristics of lead-acid battery at different temperatures

研究了不同温度下铅酸电池负极的氧化峰电流和析氢电流,发现温度越低,氧化峰电流和析氢电流越小,其中-15℃时的析氢电流只有30℃时的1/5。研究了在不同温度下电解液密度对铅酸电池负极氧化峰电流和析氢电流的影响,发现氧化峰电流和析氢电流与电解液的内阻有关,且氧化峰电流和析氢电流的最大值均出现在电解液密度1.1l^1.25 g/ml的条件下。

Linear sweep voltammetry(LSV)was carried out on the negative plates of lead-acid batteries under the conditions of varied temperatures and electrolyte densities respectively.The current value of both anodic peaks and hydrogen evolution peaks were studied.It was found that the lower the temperature was,the lower the oxidation peak current and hydrogen evolution current were.The value of hydrogen evolution current at-15℃was only 1/5 of that at 30℃.The influence of electrolyte density on anode oxidation peak current and hydrogen evolution current of lead-acid battery at different temperatures was studied.The results showed that oxidation peak current and hydrogen evolution current were related to the internal resistance of electrolyte.The maximum values of oxidation peak current and hydrogen evolution current occurred at the electrolyte density of 1.1℃1.25 g/mL.