废旧电池再资源化制备高性能中熵合金催化剂及其性能研究  

Synthesis of a high-efficacy medium-entropy alloy catalyst via the recycling of spent batteries and its subsequent performance evaluation

作　　者：郭珊 田雨 徐永滨 王朋 刘治明 GUO Shan;TIAN Yu;XU Yongbin;WANG Peng;LIU Zhiming(College of Electromechanical Engineering,Qingdao University of Science&Technology,Qingdao 266061,Shandong,China)

机构地区：[1]青岛科技大学机电工程学院,山东青岛266061

出　　处：《化工学报》2025年第1期231-240,共10页CIESC Journal

基　　金：国家自然科学基金项目(21905152,52302273);山东省泰山学者项目(tsqn202211160,tsqn202312199);山东省自然科学基金项目(ZR2023QE176);青岛市科技惠民示范专项(24-1-8-cspz-12-nsh)。

摘　　要：以从废旧三元锂离子电池中回收的镍钴锰(NCM)有价金属与钯(Pd)盐为原料,采用快速高温轰击方法制备含氮碳基体负载钯镍钴锰中熵合金纳米颗粒(Pd MEA@N-C)作为锂氧电池双功能催化剂,以实现废弃三元锂离子电池的循环使用,优化在氧还原/析出过程(ORR/OER)中放电产物过氧化锂(Li_(2)O_(2))的可逆生成与分解。XRD、TEM表明Pd MEA成功制备,XPS表明Pd的引入有利于实现合金颗粒中电子排布的精准调控。以Pd MEA@N-C为正极材料组装锂氧电池测试性能,结果显示,在限制1000 mAh·g^(-1)的容量,200 mA·g^(-1)的电流密度条件下,过电位低至0.49 V;200 mA·g^(-1)的电流密度条件下进行深度充放电测试,充放电容量高达15491 mAh·g^(-1);在循环82圈之后仍保持稳定状态。Car electrification is a green and healthy way of contemporary travel,reducing exhaust emissions while avoiding excessive consumption of fossil fuels,but the generated waste power batteries will also pose a great threat to society.Nickels,cobalt,manganese(NCM)were recovered from waste ternary lithium-ion batteries and then were alloyed with palladium.The nitrogen carbon matrix supported palladium-nickel-cobalt-manganese mediumentropy alloy nanoparticles(Pd MEA@N-C)were prepared by rapid high-temperature bombardment as doublefunction catalysts for lithium-oxygen batteries,so as to realize the recycling of waste ternary lithium-ion batteries.The reversible formation and decomposition of lithium peroxide(Li_(2)O_(2))as a discharge product in the oxygen reduction/precipitation process(ORR/OER)was optimized.XRD and TEM showed that the Pd MEA was formed successfully,and XPS showed that the introduction of Pd was conducive to the accurate regulation of electron configuration in alloy particles.The performance of lithium-oxygen batteries assembled with Pd MEA@N-C as the positive electrode material is tested.The results show that under the conditions of limiting the capacity to 1000 mAh·g^(-1)and the current density to 200 mA·g^(-1),the overpotential was as low as 0.49 V.The deep charge and discharge test was carried out at the current density of 200 mA·g^(-1),and the charge and discharge capacity was 15491 mAh·g^(-1),which remained stable after 82 cycles.

关 键 词：催化剂 NCM回收 Pd中熵合金 电化学 ORR/OER 反应动力学 

分 类 号：TQ152[化学工程—电化学工业]