新型合成有机膨胀剂对铅酸动力电池低温性能的影响研究OA北大核心CSTPCD

The effect of the new synthetic organic expander on the low temperature performance of lead-acid power batteries was discussed.The thermal stability of the sodium lignosulfonate and new expander was tested by DSC/TGA;through CV and hydrogen evolution curve tests,the effects on the surface electrochemical behavior and hydrogen evolution behavior of the anode were analyzed;the ef-fects on the microcrystal morphology of the anode active substance were analyzed by SEM;the influ-ence on the low temperature performance of power battery was analyzed by low temperature perfor-mance test;through the test of the low temperature retention after high temperature overcharge,the stability in high temperature environment was compared and analyzed;the influence of the new ex-pander on the battery charging acceptability was compared and analyzed through charging accept-ability test.It's found that the thermal stability of the new expander is better than that of sodium lig-nosulfonate;it can improve the reduction reaction of lead ion on the anode surface;from the hydro-gen evolution behavior,the hydrogen evolution potential of the new expander anode is more negative and it is more difficult to hydrogen evolution;the new expander is different from sodium lignosulfo-nate in the crystalline morphology of the anode active substance,which is more conducive to forming the grain structure with larger surface area;in terms of improving the low temperature performance of power battery,the new expander is better than sodium lignosulfonate;its high temperature resis-tance and charging acceptability are better than that of sodium lignosulfonate.