batteries.Waste ternary lithium-ion batteries are very harmful to the environment and humans,but the valuable metals such as lithium,nickel,cobalt,and manganese have high recycling value.In terms of resource recycling and environmental protection, used lithium-ion batteries have a high recycling value.At present,the recycling of waste lithium-ion batteries is facing some problems.For example,the diversity of electrode materials makes separation and purification difficult,and the high cost can also cause some problems such as secondary pollution.Therefore,it is necessary to find green and low-cost methods for the recycling of waste lithium ion batteries. Microwave metallurgy has outstanding advantages in this respect Therefore,this paper uses the mechanically crushed ternary lithium battery as the raw material to study the dielectric properties of the apparent density of the positive electrode material at room temperature and the microwave dielectric properties and absorption that change with temperature.performance.The results show that at room temperature,when the apparent density of the cathode material is 1.484g/cm3,the cathode material has the best dielectric performance;during the heating process,the cathode material has good microwaye absorption performance between 25-700C. 400 At C,the dielectric constant Er'reaches the maximum value of 11.96 (F/M). With the increase of microwave power,the time for the positive electrode powder to rise to 700C is significantly shortened,and the maximum heating rate is in the range of 320-450C.The changing trend of dielectric properties is consistent with the changing trend of microwave heating characteristics. Keywords:Lithiumion battery;Ternary;Positive electrode powder;Microwave heating;D electric constant;Heating rate 1.前言 三元锂离子电池(LBs)经过数百次循环充放电后，电池内部结构会发生不 可逆的改变，最终造成LBs的失活报废山。由于三元锂离子电池中含有 Co、M、Ni和Li等大量有价金属，随意丢弃不但会给生态环境带来严重的危 害2]，而且造成有价金属损失，因此，须对废旧三元锂离子电池进行综合回收batteries. Waste ternary lithium-ion batteries are very harmful to the environment and humans, but the valuable metals such as lithium, nickel, cobalt, and manganese have high recycling value. In terms of resource recycling and environmental protection, used lithium-ion batteries have a high recycling value. At present, the recycling of waste lithium-ion batteries is facing some problems. For example, the diversity of electrode materials makes separation and purification difficult, and the high cost can also cause some problems such as secondary pollution. Therefore, it is necessary to find green and low-cost methods for the recycling of waste lithium-ion batteries. Microwave metallurgy has outstanding advantages in this respect. Therefore, this paper uses the mechanically crushed ternary lithium battery as the raw material to study the dielectric properties of the apparent density of the positive electrode material at room temperature and the microwave dielectric properties and absorption that change with temperature. performance. The results show that at room temperature, when the apparent density of the cathode material is 1.484g/cm3, the cathode material has the best dielectric performance; during the heating process, the cathode material has good microwave absorption performance between 25-700 , ℃ 400 At , the dielectric constant Ɛr' reaches the maximum value of 11.96 (F/M). ℃ With the increase of microwave power, the time for the positive electrode powder to rise to 700 is significantly shortened, and the maximum heating rate is in the range ℃ of 320-450 . The changing trend of dielectric properties is consistent with the ℃ changing trend of microwave heating characteristics. Keywords: Lithium ion battery; Ternary; Positive electrode powder; Microwave heating; Dielectric constant; Heating rate 1. 前言 三元锂离子电池(LIBs)经过数百次循环充放电后，电池内部结构会发生不 可逆的改变，最终造成 LIBs 的失活报废[1]。由于三元锂离子电池中含有 Co、Mn、Ni 和 Li 等大量有价金属，随意丢弃不但会给生态环境带来严重的危 害[2]，而且造成有价金属损失，因此，须对废旧三元锂离子电池进行综合回收 录用稿件，非最终出版稿