Synthesis of three-dimensional free-standing WSe2/C hybrid nanofibers as anodes for high-capacity lithium/sodium ion batteries

Li, Jing1; Han, Shaobo2; Zhanq, Junwei3; Xiang, Junxiang1; Zhu, Xingqun1; Liu, Ping1; Li, Xuefeng1; Feng, Chao1; Xiang, Bin1; Gu, Meng2

2019-09-14

10.1039/c9ta06199a

Journal of Materials Chemistry A   影响因子和分区

2050-7488

2050-7496

In recent years, although there has been great progress in the exploration of high capacity alkali metal ion batteries, the design of high-durable anode materials with high power density remains challenging. In this study, a flexible three-dimensional network of WSe2/C is reported as a dual-role anode for lithium/sodium ion batteries, providing multichannels for the fast lithium/sodium ion diffusion and a buffer matrix to restrain the volume change as well as increase the electron conductivity. The in situ transmission electron microscopy characterizations reveal a minor volume expansion of the WSe2/C (similar to 8.2%) and a complete-amorphization event occurring after the first lithiation process. WSe2/C exhibited superior reversible capacity/rate capability/cycling stability in lithium/sodium ion batteries. Particularly, a large stable capacity and ultra-long cycling life at ultra-high rate (257.0 mA h g(-1) at 25 A g(-1) after 10 000 cycles) are achieved for the WSe2/C electrode in lithium ion batteries, accompanied by only 0.5% capacity loss per cycle over 1000 cycles, which reveals its excellent capacity stability at ultra-high rates. This study reveals the great potential of WSe2/C as a high-capacity dual-role anode for lithium/sodium ions batteries.

SCI ; EI

英语

通讯

Shenzhen DRC project[[2018]1433]

Chemistry ; Energy & Fuels ; Materials Science

Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary

WOS:000483565400029

ROYAL SOC CHEMISTRY

20193607402281

Anodes ; High resolution transmission electron microscopy ; In situ processing ; Metal ions ; Metals

Metallurgy:531.1 ; Electron Tubes:714.1 ; Optical Devices and Systems:741.3

Web of Science

1.Univ Sci & Technol China, Hefei Natl Res Ctr Phys Sci Microscale, Dept Mat Sci & Engn, CAS Key Lab Mat Energy Convers, Hefei 230026, Anhui, Peoples R China
2.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
3.Lanzhou Univ, Electron Microscopy Ctr, Sch Phys Sci & Technol, Minist Educ,Key Lab Magnetism & Magnet Mat, Lanzhou 730000, Gansu, Peoples R China

Li, Jing,Han, Shaobo,Zhanq, Junwei,et al. Synthesis of three-dimensional free-standing WSe2/C hybrid nanofibers as anodes for high-capacity lithium/sodium ion batteries[J]. Journal of Materials Chemistry A,2019,7(34):19898-19908.

Li, Jing.,Han, Shaobo.,Zhanq, Junwei.,Xiang, Junxiang.,Zhu, Xingqun.,...&Gu, Meng.(2019).Synthesis of three-dimensional free-standing WSe2/C hybrid nanofibers as anodes for high-capacity lithium/sodium ion batteries.Journal of Materials Chemistry A,7(34),19898-19908.

Li, Jing,et al."Synthesis of three-dimensional free-standing WSe2/C hybrid nanofibers as anodes for high-capacity lithium/sodium ion batteries".Journal of Materials Chemistry A 7.34(2019):19898-19908.