Show simple item record

AuthorLiu, Yong
AuthorElzatahry, Ahmed A.
AuthorLuo, Wei
AuthorLan, Kun
AuthorZhang, Pengfei
AuthorFan, Jianwei
AuthorWei, Yong
AuthorWang, Chun
AuthorDeng, Yonghui
AuthorZheng, Gengfeng
AuthorZhang, Fan
AuthorTang, Yun
AuthorMai, Liqiang
AuthorZhao, Dongyuan
Available date2021-09-01T10:03:26Z
Publication Date2016
Publication NameNano Energy
ResourceScopus
URIhttp://dx.doi.org/10.1016/j.nanoen.2016.04.028
URIhttp://hdl.handle.net/10576/22438
AbstractThe electrochemical performance of nanocomposites could greatly be improved by rationally designing flexible core-shell heterostructures. Typically, the uniform coating of a thin mesoporous crystalline transition metal oxide shell on flexible graphitized carbon supports can provide both fast ion and electron transport pathways, which is an ideal material for high-performance lithium-ion batteries. Herein, we report a surfactant-templating assembly coating method to deposit an ultrathin mesoporous crystalline TiO2 shell on flexible graphitized carbon supports by using amphiphilic triblock copolymer Pluronic F127 as a template. Taking multi-wall carbon nanotubes (CNTs) as an example support, the obtained flexible CNTs@mTiO2 hybrid mesoporous nanocables exhibit an ultra-high surface area (~137 m2/g), large internal pore volume (~0.26 cm3/g), uniform accessible mesopores (~6.2 nm) and ultrathin highly-crystalline mesoporous anatase shells (~20 nm in thickness). As an anode material for lithium battery, the flexible CNTs@mTiO2 hybrid mesoporous nanocables show high-rate capacity (~210 mA h g-1 at 20 C, 1 C=170 mA g-1), high Coulombic efficiency (nearly 100% during 1000 cycles at 20 C) and ultralong-cycling life (keeping ~210 mAh g-1 after 1000 cycles at 20 C). The strong synergistic coupling effect between CNT cores and thin mesoporous TiO2 shells, high surface area, accessible large pores and highly crystalline thin mesoporous shells result in excellent performance in lithium batteries. This versatile surfactant-templating assembly coating method can be easily extended to deposit an ultrathin mesoporous TiO2 layer on flat graphene (GR) to form a uniform sandwich-like flexible GR@mTiO2 nanoflakes, which opens up a new opportunity for depositing thin mesoporous transition-metal oxides on graphitized carbon supports for advanced applications in energy conversion and storage, photocatalysis, sensors and drug delivery, etc. 2016 Elsevier Ltd.
SponsorY. L, A. A. E, W. L, P. F. Z, and K. L contributed equally to this work. This work is supported by the State Key Research Program of China ( 2013CB934104 and 2012CB224805 ), the National Science Foundation ( 21210004 and U1463206), Science & Technology Commission of Shanghai Municipality ( 14JC1400700 ), China Postdoctoral Science Foundation ( 2015M580295 ), and Shanghai Leading Academic Discipline Project ( B108 ).
Languageen
PublisherElsevier Ltd
SubjectAnodes
Carbon nanotubes
Coatings
Crystalline materials
Deposits
Electric batteries
Electron transport properties
Energy conversion
Graphitization
Ions
Lithium
Lithium alloys
Lithium compounds
Mesoporous materials
Metals
Multiwalled carbon nanotubes (MWCN)
Secondary batteries
Shells (structures)
Surface active agents
Titanium dioxide
Transition metal compounds
Transition metals
Yarn
Amphiphilic triblock copolymers
Electrochemical performance
Energy conversion and storages
Graphitized carbon supports
High-performance lithium-ion batteries
Shell coating
Surfactant templating
Transition-metal oxides
Lithium-ion batteries
TitleSurfactant-templating strategy for ultrathin mesoporous TiO2 coating on flexible graphitized carbon supports for high-performance lithium-ion battery
TypeArticle
Pagination80-90
Volume Number25
dc.accessType Abstract Only


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record