锂电池正极材料烧结用匣钵防护涂层制备与性能研究  

Preparation and Performance of Saggar Protective Coating for Sintering Lithium Battery Cathode Materials

作　　者：马沛莹 韩日飞 张鑫 彭浩然 Ma Peiying;Han Rifei;Zhang Xin;Peng Haoran(BGRIMM Advanced Materials Science&Technology Co.,Ltd,Beijing 102206,China;Beijing Industrial Component Surface Strengthening and Repair Engineering Technology Research Center,Beijing 102206,China;Beijing Key Laboratory of Special Coating Materials and Technologies,Beijing 102206,China)

机构地区：[1]北矿新材科技有限公司,北京102206 [2]北京市工业部件表面强化与修复工程技术研究中心,北京102206 [3]特种涂层材料与技术北京市重点实验室,北京102206

出　　处：《热喷涂技术》2023年第3期91-98,共8页Thermal Spray Technology

摘　　要：锂离子电池具有高能量密度、长寿命、轻量化和环保等诸多优点,是一种现代化、高效能的能量储存技术。锂离子电池正极材料的制备过程中需要匣钵作为容器进行高温烧结处理,匣钵在使用过程中会发生开裂、剥落等失效现象。提升匣钵的耐高温、抗侵蚀、防粘附等性能,可有效增加其使用寿命,极大降低生产成本,保证产品质量。研究选用氧化铝(Al_(2)O_(3))作为涂层材料,采用等离子热喷涂技术在匣钵(莫来石-堇青石)内表面制备了均匀致密的涂层,并进行物料高温烧结试验,对涂层的防护性能进行了研究与分析。匣钵涂层经过50次烧结试验(950℃、12h)后,无明显剥离、脱落。匣钵涂层在烧结过程中表层形成腐蚀产物层,其余涂层部分仍为致密氧化铝涂层,有效防止了物料对匣钵的腐蚀。其中锂电材料仅微量附着于匣钵涂层的腐蚀层裂缝处,涂层防黏附效果优异。Lithium batteries have many advantages such as high energy density,long lifespan,lightweight,and environmental protection,making them a modern and efficient energy storage technology.The preparation process of positive electrode materials for lithium batteries requires a sagger as a container for high-temperature sintering treatment,which may cause cracking,peeling,and other failure phenomena during use.Improving the hightemperature resistance,corrosion resistance,and adhesion resistance of the saggar can effectively increase its service life,greatly reduce production costs,and ensure product quality.This study selected alumina(Al_(2)O_(3))as the coating material and prepared a uniform and dense coating on the inner surface of the saggar(mullite cordierite)using plasma thermal spraying technology.The material was sintered at high temperature and the protective performance of the coating was studied and analyzed.After 50 sintering tests(950℃,12h),the sagger coating showed no obvious peeling or detachment.During the sintering process,a corrosion product layer is formed on the surface of the saggar coating,while the rest of the coating is still a dense alumina coating,effectively preventing material corrosion of the saggar.Among them,lithium battery materials only adhere slightly to the corrosion layer cracks of the sagger coating,and the coating has excellent anti adhesion effect.

关 键 词：锂离子电池 匣钵 氧化铝涂层 热喷涂 

分 类 号：TG174.4[金属学及工艺—金属表面处理]