title: Silicon/Mesoporous Carbon/Crystalline TiO2Nanoparticles for Highly Stable Lithium Storage.
abstract: A core-shell-shell heterostructure of Si nanoparticles as the core with mesoporous carbon and crystalline TiO2as the double shells (Si@C@TiO2) is utilized as an anode material for lithium-ion batteries, which could successfully tackle the vital setbacks of Si anode materials, in terms of intrinsic low conductivity, unstable solid-electrolyte interphase (SEI) films, and serious volume variations. Combined with the high theoretical capacity of the Si core (4200 mA h g-1), the double shells can perfectly avoid direct contact of Si with electrolyte, leading to stable SEI films and enhanced Coulombic efficiency. On the other hand, the carbon inner shell is effective at improving the overall conductivity of the Si-based electrode; the TiO2outer shell is expected to serve as a rigid layer to achieve high structural stability and integrity of the core-shell-shell structure. As a result, the elaborate Si@C@TiO2core-shell-shell nanoparticles are proven to show excellent Li storage properties. It delivers high reversible capacity of 1726 mA h g-1over 100 cycles, with outstanding cyclability of 1010 mA h g-1even after 710 cycles.
authors: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University , Shanghai 201620, People's Republic of China.
authors: Wei
authors: W
authors: Luo
authors: Institute for Superconducting & Electronic Materials, Australian Institute of Innovative Materials, University of Wollongong , Innovation Campus, Squires Way, North Wollongong, NSW 2500, Australia.
authors: Yunxiao
authors: Y
authors: Wang
authors: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University , Shanghai 201620, People's Republic of China.
authors: Lianjun
authors: L
authors: Wang
authors: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University , Shanghai 201620, People's Republic of China.
authors: Wan
authors: W
authors: Jiang
authors: Institute for Superconducting & Electronic Materials, Australian Institute of Innovative Materials, University of Wollongong , Innovation Campus, Squires Way, North Wollongong, NSW 2500, Australia.
authors: Shu-Lei
authors: SL
authors: Chou
authors: Institute for Superconducting & Electronic Materials, Australian Institute of Innovative Materials, University of Wollongong , Innovation Campus, Squires Way, North Wollongong, NSW 2500, Australia.
authors: Shi Xue
authors: SX
authors: Dou
authors: Institute for Superconducting & Electronic Materials, Australian Institute of Innovative Materials, University of Wollongong , Innovation Campus, Squires Way, North Wollongong, NSW 2500, Australia.
authors: Hua Kun
authors: HK
authors: Liu
authors: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University , Shanghai 201620, People's Republic of China.
authors: Jianping
authors: J
authors: Yang
keywords: coating; core−shell nanostructure; lithium-ion battery; silicon anode; sol−gel process