钠离子电池负极用多酸基复合材料的制备
Preparation of polyoxometalate-based composite for the anode of sodium-ion battery
徐晓琦 1梁裕彩 2魏涛2
作者信息
- 1. 安徽省煤炭科学研究院,安徽 合肥 230001
- 2. 江苏科技大学能源与动力学院,江苏 镇江 212000
- 折叠
摘要
Na+的半径比Li+大,限制了在常用锂离子电池石墨基负极材料中的嵌脱.提出利用导电性良好的聚吡咯(PPy)对多金属氧酸盐(POM)进行包覆,并直接与氧化石墨烯(GO)复合,通过一锅法制备钠离子电池负极材料.在POM的强还原性作用下,GO变成了还原氧化石墨烯(RGO).得益于POM的多电子吸收特性及PPy、RGO良好的电子导电性,合成的磷钼酸(PMo12)-PPy/RGO纳米复合材料用作钠离子电池负极材料时,以 50 mA/g电流在 0.01～2.00 V充放电,比容量可以稳定在 300 mAh/g.
Abstract
Na+has a much larger ionic radius than Li+,which limits its insertion/extraction in the graphite-based anode materials commonly used in Li-ion battery.Polyoxometalate(POM)is coated by polypyrrole(PPy)with good conductivity,and directly combined with graphene oxide(GO)to form the anode materials for sodium-ion battery by one-pot method.GO is changed to reduced graphene oxide(RGO)for the reason of the high reducibility of POM.Benefiting from the multi-electron absorption properties of POM and the good electronic conductivity of PPy and RGO,the synthesized phosphomolybdic acid(PMo12)-PPy/RGO nanocomposite is used as the anode material of sodium-ion battery,the specific capacity can be stabilized at 300 mAh/g when charged and discharged with a current of 50 mA/g in 0.01-2.00 V.
关键词
钠离子电池/聚吡咯(PPy)/多金属氧酸盐(POM)/负极/复合材料Key words
sodium-ion battery/polypyrrole(PPy)/polyoxometalate(POM)/anode/composite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