Approaching the lithium-manganese oxides' energy storage limit with Li2MnO3 nanorods for high-performance supercapacitor

Xu, Weina1; Jiang, Zhiqiang1; Yang, Qi1; Huo, Wangchen1; Javed, Muhammad Sufyan1; Li, Yanrong1; Huang, Li2; Gu, Xiao1; Hu, Chenguo1

2018-01

10.1016/j.nanoen.2017.10.046

Nano Energy   影响因子和分区

2211-2855

2211-3282

Lithium manganese oxides are of great interest due to their high theoretical specific capacity for electrochemical energy storage. However, it is still a big challenge to approach its large theoretical limit. In this work, we report that Li2MnO3 nanorods with layered structure as superior performance electrode for supercapacitors. The synthesized Li2MnO3 nanorods possess large specific surface area of 179.5 m(2)/g. The electrode made of the asobtained Li2MnO3 nanorods exhibits high specific capacitance of 1129.5 F/g at 2 mV/s in 3 M LiCl electrolyte. Detailed electrochemical analysis shows that diffusion controlled processes contribute most of the relative capacity. First-principles calculations within density functional theory also show that the diffusion of Li+ ions in the lithium layer is much easier than that in the manganese-lithium-oxygen layer. Therefore, the ion flow in lithium layer provides most of the high specific capacitance during charge/discharge. A flexible symmetric supercapacitor is assembled based on Li2MnO3/carbon fabric cloth. Such device demonstrates high specific capacitance, high energy density, high power density and excellent cycling stability. Three supercapacitors in series can efficiently power 288 blue LEDs in parallel for about 11 min. These results indicate that Li2MnO3 nanorods are very promising as super electrode material for supercapacitors.

Li2MnO3 nanorods Supercapacitor Ion diffusion First-principles calculation

SCI ; EI

英语

其他

National High Technology Research and Development Program of China[2015AA034801]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied

WOS:000419832100020

ELSEVIER SCIENCE BV

20174704448187

Calculations ; Capacitance ; Chlorine compounds ; Density functional theory ; Diffusion ; Electrodes ; Electrolytes ; Energy storage ; Ions ; Manganese oxide ; Nanorods ; Oxides ; Supercapacitor

Energy Storage:525.7 ; Electricity: Basic Concepts and Phenomena:701.1 ; Nanotechnology:761 ; Chemical Products Generally:804 ; Mathematics:921 ; Probability Theory:922.1 ; Solid State Physics:933

Web of Science

1.Chongqing Univ, Dept Appl Phys, State Key Lab Power Transmiss Equipment & Syst Se, Chongqing 400044, Peoples R China
2.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China

Xu, Weina,Jiang, Zhiqiang,Yang, Qi,et al. Approaching the lithium-manganese oxides' energy storage limit with Li2MnO3 nanorods for high-performance supercapacitor[J]. Nano Energy,2018,43:168-176.

Xu, Weina.,Jiang, Zhiqiang.,Yang, Qi.,Huo, Wangchen.,Javed, Muhammad Sufyan.,...&Hu, Chenguo.(2018).Approaching the lithium-manganese oxides' energy storage limit with Li2MnO3 nanorods for high-performance supercapacitor.Nano Energy,43,168-176.

Xu, Weina,et al."Approaching the lithium-manganese oxides' energy storage limit with Li2MnO3 nanorods for high-performance supercapacitor".Nano Energy 43(2018):168-176.