Inhibiting grain coarsening and inducing oxygen vacancies: the roles of Mn in achieving a highly reversible conversion reaction and a long life SnO2-Mn-graphite ternary anode

标题

Inhibiting grain coarsening and inducing oxygen vacancies: the roles of Mn in achieving a highly reversible conversion reaction and a long life SnO2-Mn-graphite ternary anode

作者

作者:Hu, RZ (Hu, Renzong)^[1 ]; Ouyang, YP (Ouyang, Yunpeng)^[1 ]; Liang, T (Liang, Tao)^[1 ]; Tang, X (Tang, Xin)^[2 ]; Yuan, B (Yuan, Bin)^[1 ]; Liu, J (Liu, Jun); Zhang, L (Zhang, Lei)^[3 ]; Yang, LC (Yang, Lichun)^[1 ]; Zhu, M (Zhu, Min)^[1 ]

期刊信息

摘要

To obtain highly reversible conversion reactions, high Coulombic efficiencies, and long lifetimes in SnO2-based anodes for lithium storage, a new ternary SnO2-Mn-graphite composite has been constructed by scalable ball-milling. It is demonstrated that nanosized Mn additives successfully inhibit Sn coarsening, and favor the formation of oxygen vacancies in SnO2, which together promote the high reversibility of conversion reactions in lithiated SnO2. The SnO2-Mn binary hybrid with 30 wt% Mn contributes a stable long-life with a capacity retention of 100% after 900 cycles at 1 A g(-1). The ternary SnO2-Mn-graphite composite demonstrates high average initial Coulombic efficiencies of similar to 77%, large stable capacities of 850 mA h g(-1) at 0.2 A g(-1), and long lifetimes of more than 1000 cycles at both high rates (2 A g(-1)) and narrow potential ranges (0.01-2.4 V), with Coulombic efficiencies of 99.7%, which are among the best reported so far for SnO2-based anode materials. The simple material design strategy and fabrication method, together with the excellent electrochemical performances, demonstrate that this new ternary SnO2-Mn-graphite composite could contribute a new class of Sn-based anode materials for high capacity battery applications.

关键词

KeyWords Plus:LITHIUM-ION BATTERIES; ELECTROCHEMICAL PERFORMANCE; NEGATIVE ELECTRODES; SNO2 NANOPARTICLES; CAPACITY; STORAGE; GRAPHENE; CARBON; OXIDE; INTERCALATION

作者信息

作者信息

通讯作者地址:Zhu, M (通讯作者)

South China Univ Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Adv Energy Storage Mat, 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, Sch Mat Sci & Engn, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510640, Guangdong, Peoples R China   增强组织信息的名称     South China University of Technology
	[ 2 ] Guilin Univ Technol, Dept Mat & Chem Engn, Guilin 541004, Peoples R China   增强组织信息的名称     Guilin University of Technology
	[ 3 ] South China Univ Technol, Sch Chem & Chem Engn, Guangzhou 510640, Guangdong, Peoples R China   增强组织信息的名称     South China University of Technology

电子邮件地址:memzhu@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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