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Title:
Hierarchically Designed Germanium Microcubes with High Initial Coulombic Efficiency toward Highly Reversible Lithium Storage
Author: Zhang, Chuanjian1; Lin, Zhou1; Yang, Zhenzhong2; Xiao, Dongdong2; Hu, Pu1; Xu, Hongxia1; Duan, Yulong1; Pang, Shuping1; Gu, Lin2; Cui GuangLei(崔光磊)1
Source: CHEMISTRY OF MATERIALS
Issued Date: 2015-03-24
Volume: 27, Issue:6, Pages:2189-2194
DOI: 10.1021/acs.chemmater.5b00218
DOC Type: Article
English Abstract:

Germanium has been investigated intensively for its high specific capacity and tough nature, which make it a promising candidate anode for high energy lithium-ion batteries. However, the rational design of a germanium electrode with enhanced electrochemical performances is still a big challenge. Herein, we designed and synthesized germanium microcubes with a hierarchical structure directly on titanium foil via a simple hydrogen reduction method. An ultrahigh initial Coulombic efficiency of 91.8% was acquired due to the high crystallinity of germanium for reversible lithium insertion and extraction, less adverse side reaction for irreversible lithium loss, and unique hierarchical structure for easier electrolyte penetration. In addition, the Li2CO3-predominated solid electrolyte interface contributes significantly to the excellent cycling and rate performances of the anode. Both half and full cell performances demonstrate that germanium has potential applications in high-performance lithium-ion batteries.

WOS Headings: Science & Technology ; Physical Sciences ; Technology
WOS Subject: Chemistry, Physical ; Materials Science, Multidisciplinary
WOS Subject Extended: Chemistry ; Materials Science
WOS Keyword Plus: HIGH-CAPACITY ANODES ; ION BATTERY ANODES ; SOLID-ELECTROLYTE ; PERFORMANCE ; SILICON ; OXIDE ; GE ; NANOPARTICLES ; NANOSTRUCTURES ; NETWORKS
Indexed Type: SCI
Language: 英语
WOS ID: WOS:000351971600037
Citation statistics:
Content Type: 期刊论文
URI: http://ir.qibebt.ac.cn/handle/337004/6417
Appears in Collections:仿生能源与储能系统团队_期刊论文

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description.institution: 1.Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao Ind Energy Storage Res Inst, Qingdao 266101, Peoples R China
2.Chinese Acad Sci, Inst Phys, Beijing Lab Electron Microscopy, Beijing 100190, Peoples R China

Recommended Citation:
Zhang, Chuanjian,Lin, Zhou,Yang, Zhenzhong,et al. Hierarchically Designed Germanium Microcubes with High Initial Coulombic Efficiency toward Highly Reversible Lithium Storage[J]. CHEMISTRY OF MATERIALS,2015,27(6):2189-2194.
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