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首页> 外文期刊>Chemistry, an Asian journal >Electrochemical and Structural Study of Layered P2-Type Na2/3Ni1/3Mn2/3O2 as Cathode Material for Sodium-Ion Battery
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Electrochemical and Structural Study of Layered P2-Type Na2/3Ni1/3Mn2/3O2 as Cathode Material for Sodium-Ion Battery

机译：层状P2-型Na2 / 3Ni1 / 3Mn2 / 3O2作为钠离子电池正极材料的电化学和结构研究

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摘要

P2-type Na2/3Ni1/3Mn2/3O2 was synthesized by a controlled co-precipitation method followed by a high-temperature solid-state reaction and was used as a cathode material for a sodium-ion battery (SIB). The electrochemical behavior of this layered material was studied and an initial discharge capacity of 151.8 mAhg(-1) was achieved in the voltage range of 1.5-3.75 V versus Na+/Na. The retained discharge capacity was found to be 123.5 mAhg(-1) after charging/dis-charging 50 cycles, approximately 81.4% of the initial discharge capacity. In situ X-ray diffraction analysis was used to investigate the sodium insertion and extraction mechanism and clearly revealed the reversible structural changes of the P-2-Na2/3Ni1/3Mn2/3O2 and no emergence of the O-2-Ni1/3Mn2/3O2 phase during the cycling test, which is important for designing stable and high-performance SIB cathode materials.
机译：P2-型Na2 / 3Ni1 / 3Mn2 / 3O2是通过控制共沉淀法然后进行高温固态反应合成的，并用作钠离子电池（SIB）的正极材料。研究了这种层状材料的电化学行为，在相对于Na + / Na的电压范围为1.5-3.75 V的情况下，初始放电容量为151.8 mAhg（-1）。充电/放电50个循环后，发现保留的放电容量为123.5 mAhg（-1），约为初始放电容量的81.4％。使用原位X射线衍射分析研究钠的插入和萃取机理，并清楚地揭示了P-2-Na2 / 3Ni1 / 3Mn2 / 3O2的可逆结构变化，而O-2-Ni1 / 3Mn2 /没有出现循环测试期间为3O2相，这对于设计稳定且高性能的SIB阴极材料非常重要。

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