锂离子电池用CuFe2O4立方颗粒负极材料的合成及其电化学性能

金属氧化物材料具有多倍于商业石墨负极的理论容量，但此类材料在储锂过程中会出现体积膨胀，导致活性物质粉化脱落，影响锂离子电池的循环寿命。以金属有机框架（MOFs）普鲁士蓝立方体为自牺牲模板合成了空心CuFe₂O₄立方颗粒，并将其作为锂离子电池的负极材料。CuFe₂O₄立方块的粒径范围在300~500 nm之间，壳层厚度为40 nm。电化学测试表明CuFe₂O₄立方颗粒在200 mA/g电流密度下循环200次后放电容量仍能达到742.4 mAh/g，出色的性能得益于颗粒的中空结构能够有效缓解因储锂而产生的体积膨胀，从而延长锂离子电池的循环寿命。 

A study on the synthesis and electrochemical properties of CuFe2O4 cubes as anode material for lithium-ion batteries

Metal oxide materials have many times of the theoretical capacity of commercial graphite anode, but the volume expansion of metal oxide materials in the lithium storage process leads to the pulverization and shedding of active materials, which affects the cycle life of lithium-ion batteries. In this paper, hollow CuFe₂O₄ cubic particles were synthesized by hydrothermal method using metal organic frameworks (MOFs) Prussian blue micro-cubes as self-sacrificial templates, and were used as anode materials for lithium ion batteries. The particle size of CuFe₂O₄ cubes is between 300 nm and 500 nm, and the thickness of CuFe₂O₄ shell is about 40 nm. After 200 cycles at a current density of 200 mA/g, the discharge capacity of CuFe₂O₄ cubes still reaches 742.4 mAh/g. The excellent performance is attributed to the hollow structure of CuFe₂O₄ cubes, which could effectively alleviate the volume expansion caused by lithium storage and prolong the cycle life of lithium-ion batteries.