Effect of electrochemical dissolution and deposition order on lithium dendrite formation: a top view investigation

被引：46

作者：

Li, Wenjun ^{[1
]}

Zheng, Hao ^{[1
]}

Chu, Geng ^{[1
]}

Luo, Fei ^{[1
]}

Zheng, Jieyun ^{[1
]}

Xiao, Dongdong ^{[1
]}

Li, Xing ^{[2
]}

Gu, Lin ^{[1
]}

Li, Hong ^{[1
]}

Wei, Xianlong ^{[2
]}

Chen, Qing ^{[2
]}

Chen, Liquan ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[2] Peking Univ, Dept Elect, Key Lab Phys & Chem Nanodevices, Beijing 100871, Peoples R China

来源：

FARADAY DISCUSSIONS | 2014年 / 176卷

关键词：

IN-SITU; ELECTROLYTE INTERFACES; RECHARGEABLE BATTERIES; LITHIUM/POLYMER CELLS; OPTICAL-CELL; LI BATTERIES; GROWTH; ANODE; CHALLENGES; METAL;

D O I：

10.1039/c4fd00124a

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Rechargeable metallic lithium batteries are the ultimate solution to electrochemical storage due to their high theoretical energy densities. One of the key technological challenges is to control the morphology of metallic lithium electrode during electrochemical dissolution and deposition. Here we have investigated the morphology change of metallic lithium electrode after charging and discharging in nonaqueous batteries by ex situ SEM techniques from a top view. Formation of the hole structure after lithium dissolution and the filling of dendrite-like lithium into the holes has been observed for the first time. In addition, an in situ SEM investigation using an all-solid Li/Li2O/super aligned carbon nanotube set-up indicates that lithium ions could diffuse across through the surface oxide layer and grow lithium dendrites after applying an external electric field. The growth of lithium dendrites can be guided by electron flow when the formed lithium dendrite touches the carbon nanotube.

引用

页码：109 / 124

页数：16

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