多级次孔结构ZnMn2O4微球负极的研究

来源 :北京航空航天大学学报 | 被引量 : 0次 | 上传用户:xiaodehuwei123
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利用水热法合成了 Zn-Mn 氧化物前驱体,在温度400、500、600、700℃下,空气气氛中煅烧前驱体,以此来制备纳米片组装成的分级多孔结构的 ZnMn2O4 微球.其中,在500℃空气中煅烧前驱体制备的ZnMn2O4(ZMO-500)微球具有丰富的多级次孔结构,其作为锂离子电池负极材料,在500 mA/g的电流密度下,ZMO-500 微球负极材料循环500 次以后仍具有 1132 mAh/g高的放电比容量.ZMO-500 负极材料优异的电化学性能得益于其分级多孔结构,不仅可以增加电极和电解质之间的接触面积以促进锂离子的迁移,而且还为循环过程中电极体积膨胀提供足够的缓冲空间.
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