聚3,4-亚乙二氧基噻吩修饰MnO2的储锂性能
Lithium storage performance of poly(3,4-ethylenedioxythiophene)modified MnO2
李淑敏1
作者信息
- 1. 广州市虎头电池集团股份有限公司,广东 广州 510000
- 折叠
摘要
锰基氧化物材料的电导率较低且电化学动力学较缓慢,阻碍了进一步发展.目前大部分研究采用无机材料对其改性,且合成步骤复杂.通过简单的冷凝回流法合成多孔二氧化锰(MnO2),并采用聚 3,4-亚乙二氧基噻吩(PEDOT)修饰,形成复合材料.导电聚合物可以改善电极材料的电导率,防止活性材料与电解质的直接接触,并减小充放电期间电极材料的体积膨胀.复合材料的电化学性能较好:以 0.25 C倍率在 0.01～3.00 V循环 500 次后,放电比容量为 624 mAh/g;倍率增加至 3.00 C时,放电比容量仍保持在 314 mAh/g.
Abstract
The low conductivity and slow electrochemical kinetics of manganese-based oxide materials hinder the further development.At present,most research on its modification uses inorganic materials and involves complex synthesis steps.Porous manganese dioxide(MnO2)is synthesized using a simple condensation reflux method and is modified with poly(3,4-ethylenedioxythiophene)(PEDOT)to form a composite.Conductive polymers can improve the electrical conductivity of the electrode material,prevent direct contact of the active material with the electrolyte,and reduce the volume expansion of the electrode material during charging-discharging.The composite has good electrochemical performance.It has a specific discharge capacity of 624 mAh/g after 500 cycles at a rate of 0.25 C in 0.01-3.00 V.When the rate increases to 3.00 C,the specific discharge capacity is still keep at 314 mAh/g.
关键词
锂离子电池/负极材料/过渡金属氧化物/二氧化锰(MnO2)/聚3,4-亚乙二氧基噻吩(PEDOT)/多孔材料Key words
Li-ion battery/anode material/transition metal oxide/manganese dioxide(MnO2)/poly(3,4-ethylenedioxy-thiophene)(PEDOT)/porous material引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据