A novel electrode material, P3-type K0.33Co0.53Mn0.47O2•0.39H2O (KCM) is synthesized through an easily-operated sol-gel method and delivers considerable Na ion storage abilities when employed as both cathode and anode of NIBs. As cathode, the compound displays remarkable average voltage potentials (over 3 V) and a high discharge capacity (114 mAh g-1 at 100 mA g-1). As anode, safe and ideal average voltage potential (0.53 V), high discharge capacity (174 mAh g-1), and long cycle life (950 cycles at 500 mA g-1) are also together delivered.In addition, a KCM-based full cell is subsequently built and even without any optimization it can still exhibit high energy density (91 Wh kg−1) accompanied with long cycle performance (100 cycles at 100 mA g-1).

中文翻译：

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P3型K0.33Co0.53Mn0.47O2•0.39H2O：用于钠离子电池的新型双功能电极

通过易于操作的溶胶-凝胶法合成了一种新型的电极材料P3型K0.33Co0.53Mn0.47O2•0.39H2O（KCM），当同时用作NIB的正极和负极时，可提供相当大的Na离子存储能力。作为阴极，该化合物显示出显着的平均电压电势（超过3 V）和高放电容量（在100 mA g-1时为114 mAh g-1）。作为阳极，安全和理想的平均电压电位（0.53 V），高放电容量（174 mAh g-1）和长循环寿命（在500 mA g-1时950个循环）也一起提供。此外，KCM-随后构建了基于电池的全电池，即使没有进行任何优化，它仍然可以表现出高能量密度（91 Wh kg-1），并具有长循环性能（在100 mA g-1时可循环100次）。