虎门体育官方登录入口网

虎门体育官方登录入口网:标题

A spherical Sn-Fe3O4@graphite composite as a long-life and high-rate-capability anode for lithium ion batteries

虎门体育官方登录入口网:作者

作者:Zhang, HY (Zhang, Hanyin)^[1 ]; Hu, RZ (Hu, Renzong)^[1 ]; Liu, H (Liu, Hui)^[1 ]; Sun, W (Sun, Wei)^[1 ]; Lu, ZC (Lu, Zhongchen)^[2 ]; Liu, JW (Liu, Jiangwen)^[1 ]; Yang, LC (Yang, Lichun)^[1 ]; Zhang, Y (Zhang, Yao)^[3 ]; Zhu, M (Zhu, Min)^[1 ]

虎门体育官方登录入口网:期刊信息

虎门体育官方登录入口网:摘要

In order to further enhance the reversible capacity and cyclability for lithium storage of Sn-based alloy anode materials, a spherical-shaped Sn-Fe3O4@ C ternary-phase composite consisting of nanosized tin (Sn), magnetite (Fe3O4), and graphite (C) was prepared via a two-step process using high-efficiency discharge plasma-assisted milling (P-milling). Ultrafine Sn nanoparticles were embedded and tightly contacted with nanosized Fe3O4, with graphite nanosheets coating the outside to form a multiscale spherical structure. The Sn-Fe3O4@C nanocomposite anodes demonstrate a stable and high capacity of 793 mA h g(-1) after 240 cycles between 0.01 and 3.0 V vs. Li/Li+ at 200 mA g(-1). Furthermore, a reversible capacity of similar to 750 mA h g(-1) was obtained after 500 cycles, even when the current density increased to 2000 mA g(-1). The high capacity, good cycle performance, and superior high-rate capability characteristics were attributed to the unique nanostructure of the Sn-Fe3O4@C composites. The good dispersion of co-existing Sn and Fe3O4 nanoballs in a spherical carbon matrix resulted in an electrode with high structural stability and fast kinetics for Li ion and electron transfer, which contributed to high reversibility of alloying reactions in Sn and conversion reactions of Fe3O4. Furthermore, the spherical shape of the materials and simple preparation as compared to those of commercial anodes make the Sn-Fe3O4@C composites good candidates for practical applications.

虎门体育官方登录入口网:关键词

KeyWords Plus:STORAGE PROPERTIES; NANOSHEETS; NANOPARTICLES; PERFORMANCE; NANOCOMPOSITE; ELECTRODES; NETWORKS; NANORODS; TIN

虎门体育官方登录入口网:作者信息

作者信息

通讯作者地址:Hu, RZ (通讯作者)

S 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 ] S 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 ] S China Univ Technol, Sch Mech & Automot Engn, Guangzhou 510640, Guangdong, Peoples R China   增强组织信息的名称     South China University of Technology
	[ 3 ] Sunwoda Elect Co Ltd, Cell Technol Res Ctr, Shenzhen 518107, Peoples R China

电子邮件地址:msrenzonghu@scut.edu.cn

虎门体育官方登录入口网:出版商

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

虎门体育官方登录入口网:类别分类