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中文摘要：
通过750℃煅烧由共沉淀法制得的碳酸盐前驱物，制备出由粒径为30-40nm的纳米粒子组装的直径为600-900nm的微／纳多级结构LiMn2O4微米球。将这种LiMn2O4多孔微米球作为水系锂离子电池电极材料，在2MLi2S04水溶液中具有优良的倍率性能，在1Ag^-1，1.5Ag^-1,，2Ag^-1,和2．5Ag^-1,的电流密度下，其放电容量均在110mAhg。左右，当电流密度增至5Ag^-1,其放电容量还能保持在71mAhg^-1,。
英文摘要：
Micro/nano hierarchical LiMn204 microspheres have been successfully prepared through calcination of the carbonate precursor from co-precipitation. The spinel LiMn204 microspheres with diameters of 600-900 nm are assembled by nanoparticles with sizes of 30-40 nm. The micro/nano hiearchical LiMn：O4 microspheres exhibit excellent rate performance in 2M LizSO4 aqueous solution for applications in aqueous lithium-ion battery. When the current density is 1 A g^-1,, 1.5 A g^-1,, 2 A g^-1, or 2.5 A g^-1,, the specific discharge capacity is always about 110 mAh g^-1,. Even at the current density of 5 A g^-1,, the specific discharge capacity can still retain 71 mAh g^-1,.
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