A scalable ternary SnO2-Co-C composite as a high initial coulombic efficiency, large capacity and long lifetime anode for lithium ion batteries

标题

A scalable ternary SnO2-Co-C composite as a high initial coulombic efficiency, large capacity and long lifetime anode for lithium ion batteries

作者

作者:Liang, T (Liang, Tao)^[1 ]; Hu, RZ (Hu, Renzong)^[1 ]; Zhang, HP (Zhang, Houpo)^[1 ]; Zhang, HY (Zhang, Hanyin)^[1 ]; Wang, H (Wang, Hui)^[1 ]; Ouyang, YP (Ouyang, Yunpeng)^[2 ]; Liu, J (Liu, Jun)^[1 ]; Yang, LC (Yang, Lichun)^[1 ]; Zhu, M (Zhu, Min)^[1 ]

期刊信息

摘要

A new ternary SnO2-Co-C composite is produced using a facile and scalable ball milling method, which has a microstructure that includes refined SnO2-Co hybrids embedded in graphite. The Co additives dramatically inhibit Sn coarsening in the lithiated SnO2, which enables highly reversible conversion reactions in the SnO2-based ternary composite during cycling. The electrodes exhibit high ICEs with an average of 80.8% and a reversible capacity of 780 mA h g(-1) at 0.2 A g(-1) after 400 cycles when the composite was manufactured via small planetary ball milling, and they achieve 875 mA h g(-1) after 250 cycles when the material is prepared on a large-scale with a roller mill. Even at a high rate of 2 A g(-1), the composite has a long lifetime and delivers 610 mA h g(-1) after 1000 cycles. Furthermore, a stable capacity of 410 mA h g(-1) can be also retained in a full cell combined with a LiFePO4 cathode and SnO2-Co-C anode when cycling within 2.3-3.4 V at 0.2C. The new ternary SnO2-Co-C composite demonstrates excellent comprehensive electrochemical performances, and it is a promising candidate anode material for use in practical applications.

关键词

KeyWords Plus:NEGATIVE-ELECTRODE MATERIALS; TRANSITION METAL-CARBON; ELECTROCHEMICAL PERFORMANCE; CONVERSION REACTION; RATE-CAPABILITY; SUPERIOR ANODE; STORAGE; OXIDE; NANOPARTICLES; ALLOYS

作者信息

作者信息

通讯作者地址:Hu, RZ (通讯作者)

South China Univ Technol, Guangdong Prov Key Lab Adv Energy Storage Mat, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China.   增强组织信息的名称     South China University of Technology

地址:

	[ 1 ] South China Univ Technol, Guangdong Prov Key Lab Adv Energy Storage Mat, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China   增强组织信息的名称     South China University of Technology
	[ 2 ] Sunwoda Elect Co Ltd, Cell Technol Res Ctr, Shenzhen 518107, Peoples R China

电子邮件地址:msrenzonghu@scut.edu.cn

出版商

ROYAL SOC CHEMISTRY, THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND

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