期刊
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
卷 35, 期 7, 页码 1250-1254出版社
JOURNAL MATER SCI TECHNOL
DOI: 10.1016/j.jmst.2019.01.010
关键词
Sodium-ion batteries; Layered oxide cathode; Tin-based; Cathode
资金
- Science and Technology Project of the State Grid Corporation of China [DG71-16-027]
Layered oxides are one of the most promising cathode materials for sodium ion batteries (NIBs), however, the relatively low working voltage hinders the increase of energy density thus limiting the application scenarios of NIBs. Here we prepared and investigated a series of Sn4+ substituted Na0.67Ni0.33Mn0.67-xSnxO2 (x = 0.10, 0.20, 0.30, 0.33) and found that Sn-substitution can induce three effects: promoting O3-stack formation, smoothing the voltage profile and increasing the working voltage to similar to 3.6 V. This study would enrich the knowledge of Sn-substitution and give guide to the better design of high-voltage cathode materials for NIBs. (C) 2019 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
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