Improving the structural and cyclic stabilities of P2-type Na(0.67)MnO(2)cathode materialviaCu and Ti co-substitution for sodium ion batteries
Improving the structural and cyclic stabilities of P2-type Na(0.67)MnO(2)cathode materialviaCu and Ti co-substitution for sodium ion batteries
复制标题
通过Cu和Ti共取代钠离子电池提高P2型Na(0.67)MnO(2)正极材料的结构和循环稳定性
DOI：
10.1039/d0cc01442g
复制
发表时间：
2020
影响因子：
4.9
通讯作者：
Zhou Haoshen
中科院分区：
文献类型：
--
作者：
Zhang Xueping;Qiu Feilong;Jiang Kezhu;He Ping;Han Min;Guo Shaohua;Zhou Haoshen
采用固相法合成了空气稳定的Na_（0.67）Mn_（0.7）Cu_（0.15）Ti_（0.15）O_2（NMCT）。其可逆容量为170 mA h g−1，300次循环后容量保持率为82.5%。NMCT在电化学脱/插层过程中也表现出良好的结构稳定性，如通过操作XRD所观察到的。结果表明，在整个脱插过程中，NMCT的晶胞体积变化仅为3.2%。这些数据表明，NMCT是一种很有前途的钠离子电池（SIB）正极材料。
An air-stable Na0.67Mn0.7Cu0.15Ti0.15O2 (NMCT) has been synthesized using a solid-state method. It displays a reversible capacity of 170 mA h g−1 and a capacity retention of 82.5% after 300 cycles. NMCT also exhibits good structural stability upon electrochemical de/intercalation processes as observed by operando XRD. And the result shows that the unit-cell volume change of NMCT during the whole process of Na+ de/intercalation is only 3.2%. These data indicate that NMCT is a promising cathode material for sodium ion batteries (SIBs).