Browse

Study on Effects of Titanium Silicide Coating onto Porous Silicon Nanospheres for Lithium Ion Battery Anodes
타이타늄 실리사이드가 코팅된 다공성 실리콘 입자의 리튬이온전지

DC Field Value Language
dc.contributor.advisor성영은-
dc.contributor.author김영민-
dc.date.accessioned2017-07-19T05:52:57Z-
dc.date.available2017-07-19T05:52:57Z-
dc.date.issued2014-08-
dc.identifier.other000000021759-
dc.identifier.urihttp://hdl.handle.net/10371/129342-
dc.description학위논문 (석사)-- 서울대학교 대학원 : 화학생물공학부, 2014. 8. 성영은.-
dc.description.abstractLithium ion batteries (LIBs) have been applied mainly in small-portable devices as power sources. However, the medium-large size battery sector such as electric vehicles (EVs) and energy storage system (ESS) have opened recently, and thus the demand for much higher power density, and low cost materials bas been increased.. Si is considered as one of the most promising anode material for LIBs, due to its high theoretical capacity, nontoxic, low cost and abundance. On the other hand, Si anode has intrinsic limitations such as severe volume change and low electrical conductivity, which leads to poor cycling and rate performances, which severely limits their applications.
In this research, we present a facile synthesis of porous Si structure and enhancement of electrical conductivity via magnesiothermic reduction and TiSi2 coating layer, overcoming these limitations. Taking advantages of the porous structure and the high electrically conductive coating layer make this anode exhibit a significantly enhanced electrochemical performance in terms of cyclic, rate capability and charge transfer resistance. The TiSi2 is inactive toward lithium, which is negatively influenced in terms of specific capacity. Nevertheless, the TiSi2, which has good electrical conductivity and physical strength, not only enhance the conductivity but also maintain Si structure during cycling. This combination of porous structure via magnesiothermic reduction and highly conductive TiSi2 coating makes a synergistic effect of electrochemical performance. This novel synthesis is demonstrated as promising method for producing high capacity anode materials applicable in the next generation LIBs.
-
dc.description.tableofcontentsContents
Abstract …………………………………………………… i
List of Figures …………………………………………… iii
List of Tables……………………………………………… v
Contents……………………………………………………ⅵ
Chapter 1. Introduction……………………………………1
Chapter 2. Expeimental…………………………………12
2.1 Preparation of materials .............................12
2.2 Preparation of composite electrode .............14
2.3 Preparation of half cell ...............................14
2.4 Characterization .......................................14
2.5 Electrochemical measurement ...................16
Chapter 3 Results and discussion ........................18
3.1 The analysis of powder .............................18
3.2 The electrochemical analysis .....................34
Chapter 4 Conclusions ........................................47
References ........................................................48
국문초록.............................................................53
-
dc.formatapplication/pdf-
dc.format.extent3604724 bytes-
dc.format.mediumapplication/pdf-
dc.language.isoen-
dc.publisher서울대학교 대학원-
dc.subjectLithium ion batteries-
dc.subjectanode-
dc.subjectsilicon-
dc.subjectmagnesiothermic reduction-
dc.subjecttitanium silicide-
dc.subject.ddc660-
dc.titleStudy on Effects of Titanium Silicide Coating onto Porous Silicon Nanospheres for Lithium Ion Battery Anodes-
dc.title.alternative타이타늄 실리사이드가 코팅된 다공성 실리콘 입자의 리튬이온전지-
dc.typeThesis-
dc.contributor.AlternativeAuthorYoungmin Kim-
dc.description.degreeMaster-
dc.citation.pagesⅵ, 53-
dc.contributor.affiliation공과대학 화학생물공학부-
dc.date.awarded2014-08-
Appears in Collections:
College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Theses (Master's Degree_화학생물공학부)
Files in This Item:
  • mendeley

Items in S-Space are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse