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	用于锂离子电池负极的多孔硅材料制备; Preparation of Porous Silicon Materials as Anode for Lithium Ion Batteries
	刘晶晶 ; 孙钦钦 ; 韩响 ; 陈慧鑫 ; 陈松岩 ; 黄凯 ; 杨勇
	2013-07-28
关键词	阳极氧化 二次腐蚀 多孔硅 锂离子电池 负极材料 anodizing chemical over-etching porous silicon Lithium ion battery anode materials
英文摘要	多孔硅具有大量孔洞,能有效缓解体积膨胀带来的压力,有望成为锂离子硅基负极材料的一个研究方向.采用光助电化学腐蚀、二次化学腐蚀制备高孔隙率n型多孔硅材料,通过优化后的光助电化学腐蚀,样品的孔径约为800~1 000nM,多孔层厚度(平均孔深)约为155μM,孔隙率约74%.二次腐蚀后,样品孔径增加到1.1μM,多孔层厚度减小到110μM,孔隙率增加到84%,表明二次腐蚀增加了样品的孔径和孔隙率.以二次腐蚀的多孔硅材料为负极的锂离子半电池在0.05C的恒流充放电循环测试下,循环20次后充放电比容量保持在188和198MAH/g,效率保持90%以上.实验结果表明,多孔硅锂电极比单晶硅锂电极具有更长的循环寿命,可有效提高锂电池的性能.; Porous silicon can incorporate large amounts of Li and relieve the stress during lithiation with large superficial area and high porosity.N-porous silicon was produced by photoelectrochemical etching and chemical over-etching.The SEM images shows:the porous silicon materials produced by photoelectrochemical etching have 155 μm-long and 1 μm-wide macropores.After chemical over-etching carried out in porous silicon,the materials had 220 nm-wide walls and pores with diameter of 1.1 μm,respectively.The thickness of porous layer is 110 μm.Chemical over-etching enlarged diameters of holes,which increased poriness of the materials.At a rate of 0.05 C,the charged/discharge capacity of the cell with porous silicon materials as anode was 1 191,2 036 mAh/g in the first and dropped to 188,198 mAh/g after 20 cycles with the efficiency above 90%.The result shows that the porous silicon materials has longer cycle life than single-crystal silicon,which can improve lithium′s profermance.; 国家自然科学基金重点项目(61176050;61036003;61176092); 福建省自然科学基金项目(2012H0038)
语种	zh_CN
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/105741]
专题	航空航天－已发表论文
推荐引用方式 GB/T 7714	刘晶晶,孙钦钦,韩响,等. 用于锂离子电池负极的多孔硅材料制备, Preparation of Porous Silicon Materials as Anode for Lithium Ion Batteries[J],2013.
APA	刘晶晶.,孙钦钦.,韩响.,陈慧鑫.,陈松岩.,...&杨勇.(2013).用于锂离子电池负极的多孔硅材料制备..
MLA	刘晶晶,et al."用于锂离子电池负极的多孔硅材料制备".(2013).

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