The Na-doped layered Li_1.2-xNa_xMn_0.534Ni_0.133Co_0.133O₂ (x = 0, 0.05, 0.1 and 0.15) cathode materials with porous spherical structure for lithium-ion batteries have been successfully prepared via a facile co-precipitation method. The dual Li⁺/Na⁺ transport system is Li_1.2-xNa_xMn_0.534Ni_0.133Co_0.133O₂ cathode materials companying with dual Li⁺/Na⁺ electrolyte, which exhibits an improved initial charge-discharge efficiency, cycling stability and rate capability, compared with pristine Li_1.2Mn_0.534Ni_0.133Co_0.133O₂. Electrochemical results verify that Li_1.1Na_0.1Mn_0.534Ni_0.133Co_0.133O₂ delivers the initial charge/discharge capacity of 329.68/277.86 mAh g⁻¹ with improved initial coulombic efficiency of 84.28% at 0.1C, and shows good cycling performance with a capacity retention of 76.5% after 100 cycles at 1C much higher than 37.9% of the pristine sample. Such outstanding performance of Li_1.2-xNa_xMn_0.534Ni_0.133Co_0.133O₂ is mainly attributed to: on the one hand, the small particle size and porous structure are helpful to increase the electrochemical active surface, shorten dual Li⁺/Na⁺ diffusion pathway, thus enhancing the energy storage properties. On the other hand, the design of dual Li⁺/Na⁺ transport system enables to enlarge interlayer, stabilize crystal structure and exert mutual diffusion or transportation of Li⁺ and Na⁺.

锂离子电池的多孔球形结构，成功制备了Na掺杂的层状Li _1.2-x Na _x Mn _0.534 Ni _0.133 Co _0.133 O ₂（x = _{0、0.05、0.1}和0.15）正极材料。沉淀法。双Li ⁺ / Na ⁺传输系统是Li _1.2-x Na _x Mn _0.534 Ni _0.133 Co _0.133 O ₂阴极材料，并带有双Li ⁺ / Na ⁺与原始的Li _1.2 Mn _0.534 Ni _0.133 Co _0.133 O ₂相比，该电解质具有更高的初始充放电效率，循环稳定性和倍率性能。电化学结果证实Li _1.1 Na _0.1 Mn _0.534 Ni _0.133 Co _0.133 O ₂提供的初始充电/放电容量为329.68 / 277.86 mAh g ^-1在0.1C时初始库仑效率提高了84.28％，并显示出良好的循环性能，在1C下100次循环后的容量保持率为76.5％，远高于原始样品的37.9％。Li _1.2-x Na _x Mn _0.534 Ni _0.133 Co _0.133 O ₂如此出色的性能主要归因于：一方面，小粒径和多孔结构有助于增加电化学活性表面，缩短双Li ⁺ / Na ⁺扩散途径，从而增强了储能性能。另一方面，双Li ⁺ / Na ^+的设计传输系统可以扩大中间层，稳定晶体结构并实现Li ⁺和Na ^+的相互扩散或传输。