人工晶体学报2025，Vol.54Issue(6)：1068-1077,10.DOI:10.16553/j.cnki.issn1000-985x.2025.0025
纳米空心立方体ZnMn2O4/rGO复合材料的储锂性能
Lithium Storage Properties of Nanosized Hollow Cubic ZnMn2O4/rGO Composite Materials
摘要
Abstract
ZnMn2O4 is a potential anode material for lithium-ion batteries with high specific capacity,but its high-rate performance and cycle life need to be improved.In this paper,ZnMn2O4 hollow cubes with an edge length of about 200 nm were prepared by a facile microemulsion method at room temperature followed by an annealing process.The cubes consist of interconnected nanoparticles with sizes of 30～50 nm.In order to improve the conductivity of the material,ZnMn2O4/rGO composite was prepared by mixing ZnMn2O4 with graphene oxide(GO)followed by a heat treatment.The phase composition,microstructure,lithium storage properties and mechanism of the composite were systematically investigated.As an anode material for lithium-ion batteries,ZnMn2O4/rGO delivers discharge capacities of 1 193 and 620 mAh·g-1 at current densities of 0.1 and 4 A·g-1,respectively.A discharge capacity of 806 mAh·g-1 can be achieved after 700 cycles at 1 A·g-1.The outstanding rate performance and cycle stability can be attributed to the synergistic effect of ZnMn2O4 and reduced graphene oxide(rGO).The smaller secondary cube/primary nanoparticle sizes enable the short Li+diffusion distance.The hollow structure provides space for volume expansion of the material during lithiation,so that the cube can maintain its structural integrity.The rGO not only constructs a 3D electron transport network of the material to accelerate the electron transport speed,but also buffers the volume change during lithium insertion/extraction to maintain the structure stability of the material.This study provides a feasible strategy for the preparation of high-performance metal oxide anode materials.关键词
锂离子电池/负极材料/ZnMn2O4/还原氧化石墨烯/微乳液法/储锂性能Key words
lithium ion battery/anode material/ZnMn2O4/reduced graphene oxide/microemulsion method/lithium storage property分类
化学化工引用本文复制引用
张琳,蔡强浩,代汉文,汪燕鸣,王飞..纳米空心立方体ZnMn2O4/rGO复合材料的储锂性能[J].人工晶体学报,2025,54(6):1068-1077,10.基金项目
安徽省高校自然科学研究项目(2023AH050316) （2023AH050316）
国家级大学生创新训练计划项目(202410373029) （202410373029）
校企联合研发项目(22100172) （22100172）
