Cation-mixing stabilized layered oxide cathodes for sodium-ion batteries  

作　　者：Shaohua Guo Yang Sun Pan Liu Jin Yi Ping He Xiaoyu Zhang Yanbei Zhu Ryosuke Senga Kazu Suenaga Mingwei Chen Haoshen Zhou 

机构地区：[1]Center of Energy Storage Materials & Technology, College of Engineering and Applied Sciences, National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University [2]Energy Technology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST) [3]State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University [4]National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology (AIST) [5]Nanotube Research Center, National Institute of Advanced Industrial Science and Technology (AIST)

出　　处：《Science Bulletin》2018年第6期376-384,共9页科学通报（英文版）

基　　金：The financial support from the National Basic Research Program of China(2014CB932300);Natural Science Foundation of Jiangsu Province of China(BK20170630);NSF of China(21633003 and 51602144);sponsored by the JST-CREST ‘‘Phase Interface Science for Highly Efficient Energy Utilization",JST(Japan)

摘　　要：Sodium-ion batteries are promising for large-scale energy storage due to sodium's low cost and infinite abundance. The most popular cathodes for sodium-ion batteries, i.e., the layered sodium-containing oxides, usually exhibit reversible host rearrangement between P-type and O-type stacking upon charge/discharge. Herein we demonstrate that such host rearrangement is unfavorable and can be suppressed by introducing transition-metal ions into sodium layers. The electrode with stabilized P3-type stacking delivers superior rate capability, high energy efficiency, and excellent cycling performance. Owing to the cation-mixing nature, it performs the lowest lattice strain among all reported cathodes for sodium-ion batteries. Our findings highlight the significance of a stable host for sodium-ion storage and moreover underline the fundamental distinction in material design strategy between lithium-and sodium-ion batteries.Sodium-ion batteries are promising for large-scale energy storage due to sodium＇s low cost and infinite abundance. The most popular cathodes for sodium-ion batteries, i.e., the layered sodium-containing oxi- des, usually exhibit reversible host rearrangement between P-type and O-type stacking upon charge/dis- charge. Herein we demonstrate that such host rearrangement is unfavorable and can be suppressed by introducing transition-metal ions into sodium layers. The electrode with stabilized P3-type stacking delivers superior rate capability, high energy efficiency, and excellent cycling performance. Owing to the cation-mixing nature, it performs the lowest lattice strain among all reported cathodes for sodium-ion batteries. Our findings highlight the significance of a stable host for sodium-ion storage and moreover underline the fundamental distinction in material design strategy between lithium- and sodium-ion batteries.

关 键 词：Sodium-ion battery Layered cathodes Host arrangement Cation-mixing Stabilized framework Lowest lattice strain 

分 类 号：O646.541[理学—物理化学] TM912[理学—化学]