• 中文
    • English
  • English 
    • 中文
    • English
  • Login
View Item 
  •   DSpace Home
  • 航空航天学院
  • 航空航天-已发表论文
  • View Item
  •   DSpace Home
  • 航空航天学院
  • 航空航天-已发表论文
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

多孔硅/铜复合负极材料的制备及其电化学性能
Fabrication and Electrochemical Properties of Porous Silicon/Copper Composite as Negative Electrode Materials

Thumbnail
Full Text
多孔硅_铜复合负极材料的制备及其电化学性能.pdf (1.316Mb)
Date
2015-10-23
Author
黄燕华
刘晶晶
陈松岩
Collections
  • 航空航天-已发表论文 [2242]
Show full item record
Abstract
多孔硅材料具有特殊的孔洞结构,可以缓解嵌脱锂过程中电极材料的体积效应,已成为锂离子电池负极材料的重点研究方向之一,但仍然存在导电性差等缺点.本文采用光助电化学腐蚀、二次化学腐蚀扩洞、脉冲电沉积铜三步法制备出多孔硅/铜基复合负极材料,通过优化腐蚀条件得到了高孔隙率的多孔硅,然后在孔洞内部及表面包覆导电性较好的铜颗粒层.电化学性能测试表明,该多孔硅/铜基复合负极材料电池在0.05C的恒流充放电循环测试下,首次充放电比容量分别为2 413和4 282MAH/g,比未沉积铜的多孔硅基电极增加了414和1 900MAH/g,且容量保持率也比未沉积铜的有所改善.
 
Porous silicon(PS)can accommodate large mechanical strains by providing the empty space of pores to alleviate the volume change during the charge and discharge progress of the lithium ion batteries(LIBs),making it a promising material for rechargeable LIBs.But the electronic conductivity of PS is relatively low.In view of this,Porous silicon/copper(PS/Cu)composite is synthesized as the LIB anode by a three-step approach:electrochemical etching with illumination,chemical etching,and electrodepositing of Cu.By optimizing the etching conditions,PS with high porosity is obtained.Subsequently,the PS is coated with Cu not only on the surface but also in pores of PS by electrodepositing of Cu,which has high electrical conductivity.Electrodes based on PS/Cu achieve an initial charge/discharge capacity of 2 413mAh/g and 4 282mAh/g,which are 414mAh/g and 1 900mAh/g higher than the PS based electrodes.The cycle performance is also more enhanced than PS based electrodes.
 
Citation
厦门大学学报(自然科学版),2015,(6):126-131
URI
https://dspace.xmu.edu.cn/handle/2288/105891

copyright © 2002-2016  Duraspace  Theme by @mire  厦门大学图书馆  
About | Policies
 

 

Browse

All of DSpaceCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

My Account

LoginRegister

copyright © 2002-2016  Duraspace  Theme by @mire  厦门大学图书馆  
About | Policies