A novel electrode material, P3-type K_0.33Co_0.53Mn_0.47O₂·0.39H₂O (KCM), is synthesized through an easily-operated sol–gel method and it delivers considerable Na ion storage abilities when employed as both a cathode and an anode in NIBs. As a cathode, the compound displays remarkable average voltage potentials (over 3 V) and a high discharge capacity (114 mA h g⁻¹ at 100 mA g⁻¹). As an anode, a safe and ideal average voltage potential (0.53 V), a high discharge capacity (174 mA h g⁻¹), and a long cycle life (950 cycles at 500 mA g⁻¹) are also delivered together. In addition, a KCM-based full cell is subsequently built and even without any optimization it can still exhibit a high energy density (91 W h kg⁻¹) accompanied by a long cycle performance (100 cycles at 100 mA g⁻¹).

中文翻译：

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P3型K _0.33 Co _0.53 Mn _0.47 O ₂ ·0.39H ₂ O：用于Na离子电池的新型双功能电极

一种新型的电极材料，P3型K _0.33 Co _0.53 Mn _0.47 O ₂ ·0.39H ₂ O（KCM），是通过易于操作的溶胶-凝胶法合成的，当同时用作阴极时，它具有相当大的Na离子存储能力NIB中的阳极。作为阴极，该化合物显示显着的平均电压电势（超过3 V）和放电容量高（114毫安汞柱^-1在100mA克^-1）。作为阳极，安全且理想的平均电压电势（0.53 V），高放电容量（174 mA hg ^-1）和长循环寿命（在500 mA g ^-1时为950个循环））也一起提供。另外，随后构建了基于KCM的全电池，即使没有进行任何优化，它仍然可以显示出高能量密度（91 W h kg ^-1），并具有长循环性能（在100 mA g ^-1时可以循环100次）。