文献类型：期刊文献

英文题名：Synthesized K2O·11Al2O3 as sagger matrix for the preparation of Li-ion battery cathode materials at high temperatures

作者：Zhai, Pengtao[1,2]; Liu, Mingyang[2]; Zhou, Wenying[2]; Chen, Liugang[2]; Ding, Dafei[2]; Ye, Guotian[2]

第一作者：Zhai, Pengtao

通讯作者：Zhai, Pengtao

机构：[1] School of Engineering Management and Real Estate, Henan University of Economics and Law, Zhengzhou, China; [2] Henan Key Laboratory of High Temperature Functional Ceramics, Zhengzhou University, Zhengzhou, China

第一机构：河南财经政法大学工程管理与房地产学院

年份：2021

卷号：18

期号：3

起止页码：1017-1024

外文期刊名：International Journal of Applied Ceramic Technology

收录：EI(收录号：20210209756877);Scopus(收录号：2-s2.0-85099048995)

基金：The authors thank the National Natural Science Foundation of China (51572244, U1604252, and 51802287) for the financial support.

语种：英文

外文关键词：Alumina - Aluminum oxide - Calcination - Cathode materials - Cathodes - Corrosion resistance - Corrosive effects - Ions - Lithium compounds - Manganese compounds - Mullite - Nickel compounds - Olivine - Potash - Refractory materials - Sodium Aluminate

摘要：Refractory materials such as mullite, andalusite, forsterite, and cordierite are generally used to prepare saggers for the calcination of Li-ion battery Li(NixCoyMnz)O2 (LNCM) cathode material. However, these compounds are prone to be attacked by the LNCM materials, thereby leading to short life spans and contamination of the Li-ion battery cathode materials. To improve the corrosion resistance of refractory sagger materials, the most clear cut-way is enhancing the corrosion resistance of matrix using a new refractory component. Potassium aluminate (K2O11Al2O3, KA11) with an excellent corrosion resistance against alkaline oxide was synthesized via solid-state method using potassium carbonate (K2CO3) and industrial alumina powder (Al2O3). Interactions between KA11 and LNCM cathode materials at 800°C–1100°C were characterized by refractory-LNCM precursor laboratory-scale tests to understand the corrosion behavior of KA11. The microstructure and phase composition of synthesized KA11 and the calcined KA11-LNCM mixture cylinders were analyzed with SEM and XRD. The observations reveal that KA11 shows a better corrosion resistance to LNCM materials compared with mullite, cordierite, and forsterite. The addition of synthesized KA11 also favors the thermal shock resistances of mullite-based sagger materials. ? 2020 The American Ceramic Society