Periodic porous silicon thin films with interconnected channels as durable anode materials for lithium ion batteries

Cheng, Hua1,2,3; Xiao, Ran1,2,3; Bian, Haidong1,2,3; Li, Zhe1,2,3; Zhan, Yawen1,2,3; Tsang, Chun Kwan1,2,3; Chung, C. Y.1; Lu, Zhouguang4; Li, Yang Yang1,2,3

2014-03-14

10.1016/j.matchemphys.2013.12.003

MATERIALS CHEMISTRY AND PHYSICS   影响因子和分区

0254-0584

1879-3312

A novel porous Si (PSi) films with interconnected channels and periodic nanostructures are fabricated by a facile electrochemical etching method. The films thus obtained feature highly porous structures with nano-branches connecting pores, possessing periodically varying porosity profiles along the film thickness direction. These periodic porous Si films are found to be promising anode materials for rechargeable lithium ion batteries with a high reversible specific capacity over 2500 mAh g(-1) and capacity retention over 83% after 60 cycles, which compares favorably with the conventional Si-based electrodes, including the commercially available Si nanoparticles, sputtered Si thin films, and the normal porous Si films with homogenous porosities. The improved cycling stability achieved on the periodic porous Si film is ascribed to its special nanoporous morphology featuring high surface area, interconnecting nano-branches, and structural periodicity, which helps efficiently accommodate the volume expansion and contraction along both the vertical and the planner directions during lithiation and delithiation. (C) 2013 Elsevier B.V. All rights reserved.

Multilayers Nanostructures Thin films Etching Electrochemical properties

SCI ; EI

英语

其他

National Natural Science Foundation of China[51202206] ; National Natural Science Foundation of China[21001117/B0107]

Materials Science

Materials Science, Multidisciplinary

WOS:000331678400004

ELSEVIER SCIENCE SA

20140617291043

Anodes ; Electrochemical etching ; Electrochemical properties ; Etching ; Film preparation ; Morphology ; Multilayers ; Nanostructures ; Porosity ; Thin film lithium ion batteries ; Thin films

Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Secondary Batteries:702.1.2 ; Electron Tubes:714.1 ; Nanotechnology:761 ; Electrochemistry:801.4.1 ; Chemical Reactions:802.2 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Solid State Physics:933

MATERIALS SCIENCE

Web of Science

1.City Univ Hong Kong, COSDAF, Hong Kong, Hong Kong, Peoples R China
2.City Univ Hong Kong, Dept Phys & Mat Sci, Hong Kong, Hong Kong, Peoples R China
3.City Univ Hong Kong, Ctr Funct Photon, Hong Kong, Hong Kong, Peoples R China
4.South Univ Sci & Technol China, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China

Cheng, Hua,Xiao, Ran,Bian, Haidong,et al. Periodic porous silicon thin films with interconnected channels as durable anode materials for lithium ion batteries[J]. MATERIALS CHEMISTRY AND PHYSICS,2014,144(1-2):25-30.

Cheng, Hua.,Xiao, Ran.,Bian, Haidong.,Li, Zhe.,Zhan, Yawen.,...&Li, Yang Yang.(2014).Periodic porous silicon thin films with interconnected channels as durable anode materials for lithium ion batteries.MATERIALS CHEMISTRY AND PHYSICS,144(1-2),25-30.

Cheng, Hua,et al."Periodic porous silicon thin films with interconnected channels as durable anode materials for lithium ion batteries".MATERIALS CHEMISTRY AND PHYSICS 144.1-2(2014):25-30.