Good cycling stability and high initial efficiency demonstrated in full cells with limited lithium source for an advanced SnO2-Co-C composite anode

时间:2020-07-07作者:浏览量:40


Good cycling stability and high initial efficiency demonstrated in full cells with limited lithium source for an advanced SnO2-Co-C composite anode

作者:Wen, G (Wen, Gang)[ 1 ] ; Liu, H (Liu, Hui)[ 2 ] ; Liang, T (Liang, Tao)[ 1 ] ; Ouyang, YP (Ouyang, Yunpeng)[ 3 ] ; Tan, L (Tan, Liang)[ 1 ] ; Hu, RZ (Hu, Renzong)[ 1 ] ; Liu, J (Liu, Jun)[ 1 ] ; Zhang, Y (Zhang, Yao)[ 3 ] ; Zhu, M (Zhu, Min)[ 1 ]


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ELECTROCHIMICA ACTA


卷: 334

文献号: 135640


DOI: 10.1016/j.electacta.2020.135640


出版年: FEB 20 2020


文献类型:Article


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摘要

Despite there being many reports on SnO2-based anode materials, most of the electrode materials are tested in half cells using lithium metal with unlimited lithium-ion sources as the counter electrode, which may conceal the real properties of these composites to a certain extent. In this study, a ternary SnO2-Co-C composite was fabricated by a scalable ball milling strategy. The composite exhibited high initial Coulombic efficiency (ICE, > 80%), a large capacity (similar to 900 mA h g(-1)) and superior cycling stability (capacity retention more than 99% after 100 cycles) in half cells. Furthermore, coin-type full cells in which the ternary SnO2 -Co-C anodes were paired with different cathodes were demonstrated. A LiFePO4 vertical bar vertical bar SnO2-Co-C full cell tested at 0.5-3.4 V exhibited an ICE of 75.1% and an initial discharge capacity of 906 mA h g(-1), which were close to those of the SnO2-Co-CIILi half cells. By analyzing the cycling performance and characteristics of the charge/discharge process for the full cells with different capacity ratios of cathode/anode, it was confirmed that the capacity decay of the full cells was due to the continuous consumption of Li+ ions during cycling. Hence, the testing voltage windows were adjusted according to the lithiation/de-lithiation behavior of the SnO2. On this basis, the LiFePO4 vertical bar vertical bar SnO2-Co-C full cells tested at 2.3-3.4 V and the LiCoO2 vertical bar vertical bar SnO2-Co-C full cells tested at 2.60-3.75 V exhibited excellent cycling stability, demonstrating 80.3% and almost 100% capacity retention after 100 cycles, respectively, thereby laying a foundation for the practical application of advanced SnO2-based anodes in lithium-ion batteries. (C) 2020 Elsevier Ltd. All rights reserved.


关键词

作者关键词:Full cell performance; Tin oxide; Anode materials; Coulombic efficiency


KeyWords Plus:ELECTRODE MATERIALS; COULOMBIC EFFICIENCY; HIGH-PRECISION; ION BATTERIES; SNO2; PERFORMANCE; STORAGE; CHALLENGES; CAPACITY; ALLOYS


作者信息

通讯作者地址: Hu, RZ (通讯作者)


显示更多South China Univ Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510640, Peoples R China.

地址:


显示更多[ 1 ]‎ South China Univ Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510640, Peoples R China

显示更多[ 2 ]‎ Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China

      [ 3 ]‎ Sunwoda Elect Co Ltd, SUNWODA SCUT Joint Lab Adv Energy Storage Technol, Shenzhen 518107, Peoples R China

电子邮件地址:msrenzonghu@scut.edu.cn


基金资助致谢

基金资助机构显示详情授权号

National Natural Science Foundation of China


51671088

51621001

51822104

51831009

Guangdong Science and Technology Plan Projects

2017B010119005

Guangzhou Science and Technology Plan Projects

201707010191

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出版商

PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND


期刊信息

Impact Factor (影响因子): Journal Citation Reports

类别 / 分类

研究方向:Electrochemistry


Web of Science 类别:Electrochemistry