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

作　　者：徐晓琦[1] 梁裕彩 魏涛 XU Xiaoqi;LIANG Yucai;WEI Tao(Anhui Academy of Coal Science,Hefei,Anhui 230001,China;School of Energy and Power,Jiangsu University of Science and Technology,Zhenjiang,Jiangsu 212000,China)

机构地区：[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

出　　处：《电池》2024年第6期788-792,共5页Battery Bimonthly

基　　金：国家自然科学基金(21701083);江苏省研究生创新计划(KYCX20_3137)。

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(PMo_(12))-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。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(PMo_(12))-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 

分 类 号：TM912.9[电气工程—电力电子与电力传动] TD98[矿业工程—选矿]