采取选择性掺杂方法,将新型两亲性液晶嵌段共聚物薄膜功能化为具有各向异性的锂离子导电材料.这类薄膜不仅具有同轴且垂直取向的一维离子导电通道,而且可以在大面积范围内形成规则的阵列,可以作为锂离子电池、燃料电池等电化学能源系统的新型电解质.另一方面,这类薄膜作为模板可制备周期性排列的纳米孔、纳米粒子、纳米线阵列,形成的有序纳米结构材料可作为锂离子电池的三维电极.
李晶泽
,
陈国光
,
梅迪
,
邹威
,
李剑文
,
小村元宪
,
弥田智一
. 嵌段共聚物薄膜在电化学能源领域的应用[J]. 电化学, 2010
, 16(1)
: 11
-15
.
DOI: 10.61558/2993-074X.2028
A new series of amphiphilic liquid crystalline block copolymer thin films,having normally aligned and highly ordered nanocylinder array,were functionalized as anisotropic ion conducting materials by selectively infiltration.These ion-active nanocylinders are coaxially aligned and hexagonally arranged in a large area,which might be used as novel types of electrolyte films for electrochemical energy systems such as lithium ion battery,fuel cell,etc.Since the ordered cylinders can carry on and store the ions,the block copolymer films can be utilized as the advanced template to fabricate the ordered array of nanoporous,nanoparticles,and nanowires for the potential application in lithium ion battery as three dimensional electrode materials.
[1]Gray F M.Polymer electrolytes[M].London:The Royal Society of Chemistry,1987.
[2]Bandara L,Dissanayake M,Mellander B E.Ionic con-ductivity of plasticized(PEO)-LiCF3SO3electrolytes[J].Electrochim Acta,1998,43:1447.
[3]Golodnitsky D,Livshits E,Rosenberg Y,et al.Stretching-induced changes in ion-polymer interactions in semicrys-talline LiI-P(EO)(n)polymer electrolytes[J].Solid State Ionics,2002,147:265.
[4]Kato T.Self-assembly of phase-segregated liquid crystal structures[J].Science,2002,295:2414.
[5]Maki-Ontto R,K de Moel,Polushkin E,et al.Tridirec-tional protonic conductivity in soft materials[J].Adv Mater,2002,14:357.
[6]Tian Y Q,Watanabe K,Kong X X,et al.Synthesis,nanostructures,and functionality of amphiphilic liquid crystalline block copolymers with azobenzene moieties[J].Macromolecules,2002,35:3739.
[7]Li J Z,Kamata K,Komura M,et al.Anisotropic ion con-ductivity in liquid crystalline diblock copolymer mem-branes with perpendicularly oriented PEO cylindrical do-mains[J].Macromolecules,2007,40:8125.
[8]Li J Z,Kamata K,Iyoda T.Tailored Ag nanoparticle ar-ray fabricated by block copolymer photolithography[J].Thin Solid Films,2008,516:2577.
[9]Li J Z,Kamata K,Watanabe S,et al.Template-and vac-uum-ultraviolet-assisted fabrication of a Ag-nanoparticle array on flexible and rigid substrates[J].Adv Mater,2007,19:1267.
[10]Komura M,Iyoda T.AFM cross-sectional imaging of perpendicularly oriented nanocylinder structures of mi-crophase-separated block copolymer films by crystal-like cleavage[J].Macromolecules,2007,40:4106.
[11]Yu H F,Li J Z,Ikeda T,et al.Macroscopic parallel nanocylinder array fabrication using a simple rubbing technique[J].Adv Mater,2006,18:2213.
[12]Li H,Huang X J,Chen L Q,et al.A high capacity nano-Si composite anode material for lithium recharge-able batteries[J].Electrochem Solid State Lett,1999,2:547.
[13]Maier J.Mass storage in space charge regions of nano-sized systems(Nano-ionics.Part V)[J].Faraday Discuss,2007,134:51.
