钾掺杂O3型层状氧化物正极材料及其性能

doi:10.19976/j.cnki.43-1448/TF.2023049

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Abstract K doped O3-type Na_0.9-_xK_xCu_0.22Fe_0.30Mn_0.48O₂ (x=0, 0.05, 0.1) cathode materials were prepared by simple solid phase method. The structural stabilities and electrochemical properties of the materials were analyzed and studied by X-ray diffractometer, scanning electron microscope, transmission electron microscope, and electrochemical experiment. The results show that K doping can enhance the structural stability, the Na⁺ diffusion rate and electrochemical reversibility are also significantly improved. The O3→P3 phase transition occurs earlier and faster, which has a positive effect on improving the energy efficiency of O3-type cathode materials. The O3-type Na_0.85K_0.05Cu_0.22Fe_0.30Mn_0.48O₂ cathode material possesses excellent cycle stability, which can deliver a capacity retention of 88.6% after 150 cycles at 0.5 C. K doping is low-cost and simple to operate, which can help to promote the industrialization of stable high-performance sodium ion batteries.

Key words： sodium-ion battery cathode material O3-type layered oxide electrochemical property stability

Received: 28 April 2023 Published: 22 November 2023

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	Articles by authors
	WEI Shubing
	HE Yongju
	CAO Xinxin
	LIANG Shuquan

Cite this article:

WEI Shubing,HE Yongju,CAO Xinxin, et al. Potassium-doped O3-type layered oxide cathode material and its performance[J]. Materials Science and Engineering of Powder Metallurgy, 2023, 28(5): 438-447.

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http://pmbjb.csu.edu.cn/EN/10.19976/j.cnki.43-1448/TF.2023049 OR http://pmbjb.csu.edu.cn/EN/Y2023/V28/I5/438

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