纳米铝粒子电极的脱/嵌锂离子特性

材料研究学报

2011, Vol. 25

Issue (4): 386-390

研究论文

本期目录 | 过刊浏览

纳米铝粒子电极的脱/嵌锂离子特性

赵亚楠¹, 薛方红¹, 黄昊¹, 刘春静¹, 甘小荣², 董星龙¹

1.大连理工大学材料科学与工程学院大连 116024
2.大连理工大学化工与环境生命学部大连 116024

Lithium Ion Intercalation/Deintercalation Properties of Aluminum Nanoparticles as Anode Materials for Li–ion Batteries

ZHAO Yanan¹, XUE Fanghong¹, HUANG Hao¹, LIU Chunjing¹, GAN Xiaorong², DONG Xinglong¹

1.School of Materials Science and Engineering, Dalian University of Technology, Dalian, Liaoning 116024
2.Faculty of Chemical, Environmental and Biological Science and Technology, Dalian University of Technology, Dalian, Liaoning 116024

引用本文:

赵亚楠薛方红黄昊刘春静甘小荣董星龙. 纳米铝粒子电极的脱/嵌锂离子特性[J]. 材料研究学报, 2011, 25(4): 386-390.
, , , . Lithium Ion Intercalation/Deintercalation Properties of Aluminum Nanoparticles as Anode Materials for Li–ion Batteries[J]. Chin J Mater Res, 2011, 25(4): 386-390.

全文: PDF(1131 KB)

摘要: 用直流电弧等离子体气相蒸发法制备球状Al纳米粒子, 并对其进行了XRD、TEM以及电极的脱/嵌锂离子循环性能表征。结果表明, 制备出的Al粒子大小约为100 nm, 表面包覆一层厚度不到1nm的非晶氧化物。使用Al纳米粒子制做的负极极片组装电池, 研究了电流密度对其电化学特性的影响。结果表明, 电池的首次充放电曲线和前10次循环性能曲线表明, 电流密度最小的Al电极首次放电容量最大, 为951.9 mAh/g, 首次容量损失也最大, 其循环稳定性能也相应变差; 而电流密度最大的Al电极首次放电容量为879.7 mAh/g, 其循环稳定性能最佳。首次放电结束后, 在电极材料中出现了两种化合物AlLi和Al2Li3, 与测试出的放电容量相符。

关键词 ：复合材料, 锂离子电池, 铝纳米粒子, 负极材料, 直流电弧等离子体法

Abstract：Aluminum nanoparticles were fabricated by a physical vapor condensation method (DC arc discharge). The samples were characterized by X-ray diffraction (XRD), Transmission electron microscope (TEM) and galvanostatic cycling. Al particle size is about 100 nm, and it is coated by amorphous Al2O3. Anode slurries prepared were consisted of Al powder, acetylene black and polyvinylidene fluoride (PVDF) binder. The effects of current density on the electrochemical properties were investigated. The results show that Al electrode for the minimal current density delivers the highest initial discharge capacity (Li intercalation process) of 951.9 mAh/g but cycle life is poor. Al electrode for the maximal current density delivers initial discharge capacities of 879.7 mAh/g and possesses relatively good cycleability. After the initial discharge only two composites (AlLi and Al2Li3) in Al electrode are found, which correspond to the initial discharge capacity.

收稿日期: 2011-04-08

ZTFLH:

TQ152

基金资助:

高等学校博士学科点专项科研基金资助课题20100041110032资助项目。

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