Li(Ni_(x)Co_(y)Mn_(z))O_(2)正极材料对溶胶-凝胶法制备KAlSi_(2)O_(6)的侵蚀研究  

Corrosion of Li(Ni_(x)Co_(y)Mn_(z))O_(2)cathode materials to KAlSi_(2)O_(6)prepared via sol-gel method

作　　者：马俊花 罗忠涛[1] 李烨[1] 贾全利[1] 穆元冬 陈留刚[1] Ma Junhua;Luo Zhongtao;Li Ye;Jia Quanli;Mu Yuandong;Chen Liugang(Henan Key Laboratory of High Temperature Functional Ceramics,Zhengzhou University,Zhengzhou 450052,Henan,China;不详)

机构地区：[1]郑州大学、河南省高温功能材料重点实验室,河南郑州450052

出　　处：《耐火材料》2023年第4期305-309,共5页Refractories

基　　金：国家自然科学基金(51802287);河南省重点研发与推广专项(212102210593)。

摘　　要：将不加和添加CaF_(2)的KAlSi_(2)O_(6)(KAS_(4))溶胶于800~1300℃煅烧得到的KAS_(4)以及原料CaF_(2)粉,分别与Li(Ni_(x)Co_(y)Mn_(z))O_(2)(LNCM)按照质量比70∶30混合均匀,然后在1100℃保温6 h进行侵蚀试验。对比分析了不加和添加CaF_(2)的KAS_(4)的物相组成以及侵蚀试验后几种材料的物相组成和显微结构。结果表明:1)添加1.88%(w)CaF_(2)可以使KAS_(4)纯相的生成温度下降约100℃;2)不加CaF_(2)的KAS_(4)比添加CaF_(2)的具有更好的抗LNCM侵蚀性能;3)CaF_(2)与LNCM在高温下容易发生反应。KAlSi_(2)O_(6)(KAS_(4))sol with or without CaF_(2)was calcined at 800-1300℃to obtain KAS_(4)powder.The obtained KAS_(4)powder and CaF_(2)powder were uniformly mixed with Li(Ni_(x)Co_(y)Mn_(z))O_(2)(LNCM)materials in the mass ratio of 70∶30,and then held at 1100℃for 6 h for corrosion tests.The phase composition of KAS_(4)without or with CaF_(2)as well as the phase composition and microstructure after corrosion tests were compared and analyzed.The results illustrate that:(1)1.88 mass%CaF_(2)addition reduces the forming temperature of KAS_(4)pure phase by approximately 100℃;(2)CaF_(2)-free KAS_(4)exhibits better corrosion resistance to LNCM compared with CaF_(2)-containing KAS_(4);(3)CaF_(2)is easy to react with LNCM at high temperatures.

关 键 词：溶胶-凝胶法 KAlSi_(2)O_(6) Li(Ni_(x)Co_(y)Mn_(z))O_(2) 抗侵蚀性 

分 类 号：TQ175[化学工程—硅酸盐工业]