摘要
采用控制单一变量法,选用4款不同硫含量的炭黑产品,借助扫描电子显微镜法(SEM)、电感耦合等离子体光谱分析法(ICP)、电阻率测试仪、电池检测柜等对炭黑原材料粉末、电极片、电芯进行不同维度的测试分析。结果表明,炭黑产品受原材选型及生产工艺影响,产品含硫量存在较大差异,炉黑产品结构中存在较多的官能团,更易分散,可降低正极片电阻率,也有利于降低电芯直流内阻(DCIR);炭黑硫含量对倍率及高低温性能无显著影响,但是,硫杂质的存在会对比容量、循环性能造成负面影响,尤其在日历寿命方面,硫含量对荷电保持率与容量恢复率的影响呈现出较强的负相关性。该研究结果对高硫炭黑在锂离子电池中的应用提供了参考。
The method of controlling a single variable was adopted,four carbon black products with different sulfur contents were selected,and the carbon black raw material powder,electrode,and battery cell were tested and analyzed from different dimensions by using SEM,ICP,resistivity tester,and battery detection cabinet.The results show that the sulfur content of carbon black products varies greatly due to the influence of raw material selection and production process.There are more functional groups in the structure of furnace carbon black products,which more easily disperse,resulting in reducing the resistivity of cathode sheets and the DCIR of battery cells.The sulfur content of carbon black has no significant effect on the rate and high/low temperature performance,but the sulfur impurities have a negative impact on the specific capacity and cycling performance,especially in terms of calendar life.The impact of sulfur content on the charge retention and capacity recovery rate shows a strong negative correlation.The research results provide reference for the application of high-sulfur carbon black in lithium-ion batteries.
作者
仲启方
孙延生
ZHONG Qifang;SUN Yansheng(Do-Fluoride New Energy Technology Co.,Ltd.,Jiaozuo Henan 454150,China)
出处
《电源技术》
北大核心
2025年第10期2066-2071,共6页
Chinese Journal of Power Sources
关键词
硫杂质
硫含量
极片
电性能
sulfur impurities
sulfur content
electrode sheet
electrical performance
