化工新型材料

化工新型材料 ›› 2022, Vol. 50 ›› Issue (5) : 137-140. DOI: 10.19817/j.cnki.issn1006-3536.2022.05.028

新材料与新技术

Eu³⁺掺杂对LiNi_0.8Co_0.1Mn_0.1O₂正极材料电化学性能的影响

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Influence of Eu³⁺ doping on the electrochemical performance of LiNi_0.8Co_0.1Mn_0.1O₂ cathode material

Xiong Ya, Zou Haifeng, Chen Zhuo, Cheng Hu

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Received
2021-01-18
Issue Date	Revised Date
2022-06-06	2021-01-18

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摘要

采用高温固相煅烧法制备Eu³⁺掺杂的锂离子电池正极材料LiNi_0.8Co_0.1Mn_0.1O₂,通过X射线衍射仪(XRD)、扫描电子显微镜(SEM)和充放电测试,考察不同掺杂量的Eu³⁺对材料结构、形貌及电化学性能的影响。结果显示,Eu³⁺的掺入没有改变材料晶体结构,但降低了材料的电极电阻,从而提高了材料的循环稳定性。在3.0～4.3V、1C条件下,Eu³⁺掺杂量为0.5%的材料在循环120圈后容量保持率为83.4%,未掺杂材料的容量保持率仅有63.4%。

Abstract

Eu³⁺ doping LiNi_0.8Co_0.1Mn_0.1O₂ cathode material for Li-ion batteries was prepared by high-temperature solid-state calcination method.The effects of Eu³⁺ on the structure,morphology and electrochemical properties of the materials were investigated by X-ray diffraction (XRD),scanning electron microscopy (SEM) and charge-discharge test.The results shown that the doping of Eu³⁺ did not change the crystal structure of the material,but reduced the electrode resistance of the material,which improved the cycling stability of the material.Under the conditions of 3.0～4.3V and 1C,the capacity retention rate of 0.5% Eu³⁺ doped material was 83.4% after 120 cycles,while that of undoped materials was only 63.4%.

关键词

锂离子电池 / 正极材料 / 掺杂 / Eu³⁺

Key words

lithium ion battery / cathode material / doping / Eu³⁺

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Eu³⁺掺杂对LiNi_0.8Co_0.1Mn_0.1O₂正极材料电化学性能的影响[J]. 化工新型材料, 2022, 50(5): 137-140 DOI:10.19817/j.cnki.issn1006-3536.2022.05.028

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基金资助

国家自然科学基金(22062004)

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