全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

纳米晶Li_7Si_3合金的制备与性能表征

Keywords: 纳米晶,Li7Si3,结构精修,杨氏模量

Full-Text   Cite this paper   Add to My Lib

Abstract:

为研究纳米结构锂电池阳极材料的特性,试制了纳米晶Li-Si合金.采用优化的纳米晶合金块体材料制备工艺,即熔炼制备粗晶Li7Si3合金铸锭、高能球磨得到Li7Si3非晶粉末,结合放电等离子烧结(sparkplasmasintering,SPS)制备得到了纳米晶Li7Si3合金,并对其进行了Rietveld结构精修和杨氏模量测定.结果表明:纳米晶Li7Si3单胞结构参数为a=b=0.4452nm(比粗晶增加0.38%),c=1.8239nm(比粗晶增加0.58%),单胞体积Vo=0.313070nm3(比粗晶增加1.35%).利用纳米压痕法测定纳米晶Li7Si3合金的杨氏模量为(30.6±2.4)GPa.

References

[1]  POIZOT P,LARUEILE S,GRUGEON S,et al.Searching for new anode materials for the Li-ion technology:time to deviate from the usual path[J].J Power Sources,2001,97/98:235-239.
[2]  WEN C J,HUGGINS R A.Chemical diffusion in intermediate phases in the lithium-silicon system[J].Journal of Solid State Chemistry,1981,37(3):271-278.
[3]  LIMTHONGKUL P,JANG Y I,DUDNEY N J,et al.Electrochemically-driven solid-state amorphization in lithium-silicon alloys and implications for lithium storage[J].Acta Materialia,2003,51(4):1103-1113.
[4]  OBROVAC M N,CHRISTENSEN L.Structural changes in silicon anodes during lithium insertion/extraction[J].Electrochem Solid-State Lett,2004,7(5):A93-A96.
[5]  TRILL J H,TAO C Q,WINTER M,et al.NMR investigations on the lithiation and delithiation of nanosilicon-based anodes for Li-ion batteries[J].Journal of Solid State Electrochemistry,2011,15:349-356.
[6]  OBROVACM N,KRAUS L J.Reversible cycling of crystalline silicon powder[J].Journal of Electrochemical Society,2007,154(2):A103-A108.
[7]  ZHANG T,GAO J,FU L J,et al.Natural graphite coated by Si nanoparticles as anode materials for lithium ion batteries[J].J Mater Chem,2001,17:1321-1325.
[8]  CHAN C K,PENG H L,LIU G,et al.High-performance lithium battery anodes using silicon nanowires[J].Nat Nano,2008(3):31-35.
[9]  LEE K L,JUNG J Y,LEE S W,et al.Electrochemical characteristics of a-Si thin film anode for Li-ion rechargeable batteries[J].J Power Sources,2004,129(2):270-274.
[10]  CUI L F,RUFFO R,CHAN C K,et al.Crystallineamorphous core-shell silicon nanowires for high capacity and high battery electrodes[J].Nano Lett,2008,9(1):491-495.
[11]  CHEN X L,GERASOPOULOS K,GUO J C,et al.Virus-enabled silicon anode for lithium-ion batteries[J].ACS Nano,2010,4(9):5366-5372.
[12]  SZCZECH J R,JIN S.Nanostructured silicon for high capacity lithium battery anodes[J].Energy Environ Sci,2011(4):56-72.
[13]  王保峰,杨军,解晶莹,等.锂离子电池用硅/碳复合负极材料[J].化学学报,2003,61(10):1572-1576.WANG Bao-feng,YANG Jun,XIE Jing-ying,et al.Si/C composite negative electrode material for lithium ion batteries[J].Acta Chimica Sinica,2003,61(10):1572-1576.
[14]  PARK M H,KIM M G,JOO J,et al.Silicon nanotube battery anodes[J].Nano Lett,2009,9(11):3844-3847.
[15]  KRISHNAN R,LU T M,KORATKAR N.Functionally strain-graded nanoscoops for high power Li-ion battery anodes[J].Nano Lett,2010,11(2):377-384.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133