化工新型材料

化工新型材料 ›› 2025, Vol. 53 ›› Issue (2) : 112-116. DOI: 10.19817/j.cnki.issn1006-3536.2025.02.002

新材料与新技术

钠离子电池正极材料锰酸钠的合成及其性能研究

^1,2,3

^1,2,3*

作者信息 +

Synthesis and performance of sodium manganate as cathode material for sodium-ion batteries

Han Yelin^1,2,3, Xie Hongyan^1,2,3

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文章历史 +

Received
2023-12-07
Issue Date	Revised Date
2025-02-20	2023-12-07

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摘要

以软锰矿为原料,通过酸浸碱浸并结合高温固相法合成了钠离子电池正极材料锰酸钠(化学式Na_0.44MnO₂),通过X射线衍射仪、扫描电子显微镜、能量色散谱仪、X射线光电子能谱仪以及恒流充放电测试、电化学阻抗和循环伏安等测试方法,分析了Na_0.44MnO₂的晶体结构、微观形貌和电化学性能等。结果表明:制备的Na_0.44MnO₂为结晶良好的棒状结构,宽度为200～400nm,长度为2～5μm;在0.5C和1C倍率条件下首圈放电比容量分别为117.5mAh/g、84.8mAh/g,循环100圈后容量保持率约为90%。

Abstract

Sodium manganate (chemical formula Na_0.44MnO₂),a cathode material for sodium-ion batteries,was synthesized from pyrolusite by acid leaching and alkaline leaching combined with high-temperature solid-phase method.The crystal structure,microstructure and electrochemical properties of Na_0.44MnO₂ were analyzed by XRD,SEM,EDS,XPS,constant-current charging-discharge test,electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV).The results showed that the prepared Na_0.44MnO₂ exhibited a well-crystallized rod-like structure with a width of 200～400nm and a length of 2～5μm.At 0.5C and 1C,the discharge specific capacity of the first circle was 117.5mAh/g and 84.8mAh/g,respectively,and the capacity retention rate was about 90% after 100 cycles.

关键词

软锰矿 / 高温固相法 / 锰酸钠 / 电化学性能

Key words

pyrolusite / high-temperature solid-phase method / sodium manganate / electrochemical performance

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钠离子电池正极材料锰酸钠的合成及其性能研究[J]. 化工新型材料, 2025, 53(2): 112-116 DOI:10.19817/j.cnki.issn1006-3536.2025.02.002

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