Nanovoid Formation and Annihilation in Gallium Nanodroplets under Lithiation-Delithiation Cycling
文献类型：期刊论文
| 作者 | Liang, WT ; Hong, L ; Yang, H ; Fan, FF ; Liu, Y ; Li, H ; Li, J ; Huang, JY ; Chen, LQ ; Zhu, T ; Zhang, SL |
| 刊名 | NANO LETTERS
 |
| 出版日期 | 2013 |
| 卷号 | 13期号:11页码:5212 |
| 关键词 | Gallium nanodroplets lithium ion battery nanovoid in situ TEM phase field |
| ISSN号 | 1530-6984 |
| 通讯作者 | Zhang, SL (reprint author), Penn State Univ, Dept Engn Sci & Mech, 227 Hammond Bldg, University Pk, PA 16802 USA. |
| 中文摘要 | The irreversible chemomechanical degradation is a critical issue in the development of high-capacity electrode materials for the next-generation lithium (Li)-ion batteries. Here we report the self-healing behavior of gallium nanodroplets (GaNDs) under electrochemical cycling at room temperature, observed with in situ transmission electron microscopy (TEM). During lithiation, the GaNDs underwent a liquid-to-solid phase transition, forming a crystalline phase (LixGa) with similar to 160% volume expansion. Owing to the uneven Li flow during lithiation, the fully lithiated GaNDs exhibited highly distorted morphologies. Upon delithiation, the reverse phase transition occurred, accompanied with the nucleation and growth of a nanosized void. After the GaNDs were fully delithiated, the nanovoid gradually annihilated. Our analysis, along with phase field modeling and experimental measurements of the void growth and annihilation, provides mechanistic insights into the void formation and annihilation mechanism. The GaNDs may function as an effective healing agent in durable composite electrodes for high-performance Li-ion batteries, wherein active components, such as Si, are susceptible to fracture. |
| 资助信息 | National Science Foundation [CMMI-1201058, CMMI-1100205, CMMI-1235092, DMR-1240933, DMR-1120901]; Laboratory Directed Research and Development (LDRD) project at Sandia National Laboratories (SNL); Nanostructures for Electrical Energy Storage (NEES), an Energy Frontier Research Center (EFRC); U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DESC0001160]; LDRD; NEES center; U.S. Department of Energy's National Nuclear Security Administration [DE-AC04-94AL85000] |
| 语种 | 英语 |
| 公开日期 | 2014-01-16 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/57240]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Liang, WT,Hong, L,Yang, H,et al. Nanovoid Formation and Annihilation in Gallium Nanodroplets under Lithiation-Delithiation Cycling[J]. NANO LETTERS,2013,13(11):5212. |
| APA | Liang, WT.,Hong, L.,Yang, H.,Fan, FF.,Liu, Y.,...&Zhang, SL.(2013).Nanovoid Formation and Annihilation in Gallium Nanodroplets under Lithiation-Delithiation Cycling.NANO LETTERS,13(11),5212. |
| MLA | Liang, WT,et al."Nanovoid Formation and Annihilation in Gallium Nanodroplets under Lithiation-Delithiation Cycling".NANO LETTERS 13.11(2013):5212. |
入库方式： OAI收割
来源：物理研究所
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