A novel air-stable O3-type layered oxide cathode material with low Ni content for sodium-ion batteries,International Journal of Energy Research

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A novel air-stable O3-type layered oxide cathode material with low Ni content for sodium-ion batteries
International Journal of Energy Research ( IF 4.3 ) Pub Date : 2022-06-11 , DOI: 10.1002/er.8230
Şaban Patat _{1,

2,

3} , Ayşe Şahin _{2,

3} , Yusuf Taş _{2,

3} , Ferhat Şanlı _{2,

3} , Yakup Yılmaz _{2,

3} , Tayfur Öztürk _{3,

4}

Affiliation

A novel O3-NaMn_0.42Fe_0.42Ni_0.17O₂ cathode material for sodium-ion batteries is synthesized, for the first time, by a co-precipitation method followed by solid-state reaction. The effect of Ni²⁺, Cu²⁺ and Ca²⁺ substitution for Mn⁴⁺ and Fe³⁺ on the structural stability, rate capability and cycling performance of the cathode material are examined. Chemical titration results and powder X-ray diffraction patterns indicate that the substitution of Ni²⁺, Cu²⁺ and Ca²⁺ for Fe³⁺ and Mn⁴⁺ can inhibit the reaction of Na⁺ ions in the structure of O3-NaMn_0.33Fe_0.33Ni_0.21Cu_0.08Ca_0.04O₂ with air. The Ni²⁺, Cu²⁺ and Ca²⁺-substituted O3-NaMn_0.33Fe_0.33Ni_0.21Cu_0.08Ca_0.04O₂ cathode material show a higher capacity and better cycling stability than that of O3-NaMn_0.42Fe_0.42Ni_0.17O_2, indicating that a small amount of Ni²⁺, Cu²⁺ and Ca²⁺ substitution can improve the structure/air stability and the electrochemical performance. When O3-NaMn_0.33Fe_0.33Ni_0.21Cu_0.08Ca_0.04O₂ cathode material is combined with the hard carbon anode, a full cell gives 220 Wh kg⁻¹ energy density and 100% capacity retention after 56 charge/discharge cycles at 0.5C. The O3-NaMn_0.33Fe_0.33Ni_0.21Cu_0.08Ca_0.04O₂ can be thought of as a potential cathode active material to encourage progress toward sodium-ion battery commercialization due to the high industrial applicability of the synthesis process and good electrochemical performance.

中文翻译：

一种用于钠离子电池的新型低镍空气稳定 O3 型层状氧化物正极材料

首次采用共沉淀固相法合成了一种新型O3-NaMn _0.42 Fe _0.42 Ni _0.17 O _{2钠离子电池正极材料。}研究了Ni ²⁺、Cu ²⁺和Ca ²⁺替代Mn ⁴⁺和Fe ³⁺对正极材料的结构稳定性、倍率性能和循环性能的影响。化学滴定结果和粉末X射线衍射图表明，Ni ²⁺、Cu ²⁺和Ca ²⁺替代Fe ³⁺和Mn ⁴⁺能抑制O3-NaMn _0.33 Fe _0.33 Ni _0.21 Cu _0.08 Ca _0.04 O ₂结构中的Na ⁺离子与空气的反应。Ni ²⁺、Cu ²⁺和Ca ²⁺取代的O3-NaMn _0.33 Fe _0.33 Ni _0.21 Cu _0.08 Ca _0.04 O ₂正极材料比O3-NaMn _0.42 Fe _0.42 Ni _0.17 O具有更高的容量和更好的循环稳定性_2、表示少量Ni²⁺、Cu ²⁺和Ca ²⁺取代可以提高结构/空气稳定性和电化学性能。当 O3-NaMn _0.33 Fe _0.33 Ni _0.21 Cu _0.08 Ca _0.04 O ₂正极材料与硬碳负极结合时，全电池在 0.5C 下进行 56 次充电/放电循环后可提供 220 Wh kg ^-1的能量密度和 100% 的容量保持率. O3-NaMn _0.33 Fe _0.33 Ni _0.21 Cu _0.08 Ca _0.04 O ₂由于合成过程的高工业适用性和良好的电化学性能，可以被认为是促进钠离子电池商业化进程的潜在正极活性材料。

更新日期：2022-06-11

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