Improved electrochemical performance of P2-type concentration-gradient cathode material Na0.65Ni0.16Co0.14Mn0.7O2 with Mn-rich core for sodium-ion batteries. - Gao, Nengshuang; Guo, Yiwen; Chen, Yuanhua; Feng, shuaiqiang; Li, Hechen; Sun, Ruicong; Huang, Bin; Zhong, Shengkui; Chen, Quanqi (Journal of Alloys & Compounds, 2023)