Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7725558 | Journal of Power Sources | 2018 | 10 Pages |
Abstract
Sodium-ion batteries (SIBs) are an emerging electrochemical energy storage technology that has high promise for electrical grid level energy storage. High capacity, long cycle life, and low cost cathode materials are very much desired for the development of high performance SIB systems. Sodium manganese oxides with different compositions and crystal structures have attracted much attention because of their high capacity and low cost. Here we report our investigations into a group of promising lithium doped sodium manganese oxide cathode materials with exceptionally high initial capacity of â¼223â¯mAh gâ1 and excellent capacity retentions, attributed primarily to the absence of phase transformation in a wide potential range of electrochemical cycling, as confirmed by in-operando X-ray diffraction (XRD), Rietveld refinement, and high-resolution 7Li solid-state NMR characterizations. The systematic study of structural evolution and the correlation with the electrochemical behavior of the doped cathode materials provides new insights into rational design of high-performance intercalation compounds by tailoring the composition and the crystal structure evolution in electrochemical cycling.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Lufeng Yang, Xiang Li, Xuetian Ma, Shan Xiong, Pan Liu, Yuanzhi Tang, Shuang Cheng, Yan-Yan Hu, Meilin Liu, Hailong Chen,