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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Quaternary Transition Metal Oxide Layered Framework: O3-Type Na[Ni(0.32)Fec(0.13)Co(0.15)Mn(0.40)]O-2 Cathode Material for High-Performance Sodium-Ion Batteries
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Quaternary Transition Metal Oxide Layered Framework: O3-Type Na[Ni(0.32)Fec(0.13)Co(0.15)Mn(0.40)]O-2 Cathode Material for High-Performance Sodium-Ion Batteries

机译：第四型过渡金属氧化物层状框架：O 3型Na [Ni（0.32）FEC（0.13）CO（0.15）Mn（0.40）] O-2用于高性能钠离子电池的阴极材料

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摘要

Analogous compounds in lithium-ion batteries (LIBs), various ternary chemical compositions in O3-type layered oxides, have been introduced in sodium-ion batteries (SIBs). However, O3-type ternary transition metal oxide cathodes, including the NaNixCoyMnzO2 and NaNixFeyMnzO2 (x + y + z = 1) compounds, continue to face several challenges with respect to their low reversible capacity and poor cycle retention owing to their structural instability. Herein, we propose the well-balanced quaternary transition metal oxide structure of O3-type Na[Ni0.32Fe0.13Co0.15Mn0.40]O-2 as cathode materials that have an average composition of both Na[Ni0.25Fe0.25Mn0.5]O-2 and Na[Ni0.4Co0.3Mn0.3]O-2 compounds. Compared to its respective ternary members, the Na[Ni0.32Fe0.13Co0.15Mn0.40]O-2 cathode exhibits a higher specific capacity as well as improved cycling stability and rate capability. The post-mortem ex-situ X-ray diffraction (XRD) studies of a cycled electrode clearly show that coexistence of quaternary transition metals in a Na[Ni0.32Fe0.13Co0.15Mn0.40]O-2 cathode could improve the structural stability. Moreover, quaternary transition metal oxide frameworks effectively prevent the dissolution of transition metals during cycling, thus improving the battery performances. The appealing physical properties and electrochemical performance of this material demonstrate its great promise for a high-performance O3-type cathode in sodium-ion batteries.
机译：在锂离子电池（LIBS）中的类似化合物，在钠离子电池（SIBS）中引入了O3型层状氧化物中的各种三元化学组合物。然而，o3型三元过渡金属氧化物阴极，包括纳米克西MNZO2和纳米XFEYMNZO2（X + Y + Z = 1）化合物，由于其结构不稳定性而导致其低可逆容量和循环保留不佳，继续面对几个挑战。在此，我们提出了O3型Na [Ni0.32Fe0.13CO0.15MN0.40.13CO0.15MN0.40] O-2作为阴极材料的良好平衡的季过渡金属氧化物结构，其具有纳米NA的平均组成[Ni0.25Fe0.25Mn0。 5] O-2和Na [Ni0.4CO0.3MN0.3] O-2化合物。与其各自的三元构件相比，Na [Ni0.32Fe0.13Co0.15Mn0.40] O-2阴极表现出更高的特定容量以及改善的循环稳定性和速率能力。循环电极的验验前u-situ X射线衍射（XRD）研究清楚地表明Na [Ni0.32Fe0.13Co0.15Mn0.40] O-2阴极中的季过渡金属的共存可以提高结构稳定性。此外，四季过渡金属氧化物框架有效地防止循环期间过渡金属的溶解，从而改善电池性能。这种材料的吸引物理性质和电化学性能展示了其在钠离子电池中的高性能O3型阴极的巨大希望。

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