Defective synergy of 2D graphitic carbon nanosheets promotes lithium-ion capacitors performance

Li，Guangchao1; Huang，Yaling1; Yin，Zhoulan1; Guo，Huajun1; Liu，Yong2; Cheng，Hua3; Wu，Yuping4; Ji，Xiaobo1,2; Wang，J.1,2

2019

10.1016/j.ensm.2019.07.046

Energy Storage Materials   影响因子和分区

2405-8297

2405-8297

2D carbon materials show extraordinarily promising prospects in energy storage systems. To improve the performance of lithium-ion capacitors (LICs), it is urgently necessary for addressing the sluggish kinetics behavior of battery-type carbon negative electrode. Herein, novel 2D defective high-graphitic carbon nanosheets (GNS), which is derived from in-situ catalytic graphitization of 1D nanorods precursor, are presented and employed as negative electrode materials in LICs. The effects of defects contained in the as-prepared samples are further explored by the First-principle calculations, revealing that carbonylation and N-doping (particularly pyridine N) manifest synergistic effect on improving the electronic conductivity and regulating the microstructure. The high reversible capacity accompanied with large plateau capacity and superior rate capability in the half-cell test implies that GNS can be a promised candidate as negative electrode for LICs. Excitingly, the fabricated LICs exhibit high energy density of 112 Wh kg and excellent power density of 19,600 W kg, together with outstanding energy density retention of 96.5% after 5000 cycles at 5 A g. The defects-controlled in-situ catalytic strategy for preparing GNS may provide a brand-new way for materials design for energy storage.

Carbon nanosheets Catalytic graphitization Defective synergy Lithium-ion capacitors Negative electrode

SCI ; EI

英语

其他

Guangdong Special Support for the Science and Technology Leading Young Scientist[2016TQ03C919]

Chemistry ; Science & Technology - Other Topics ; Materials Science

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

WOS:000500484000029

ELSEVIER

20193307304343

Carbonylation ; Defects ; Electrodes ; Energy storage ; Graphite ; Graphitization ; Ions ; Lithium ; Nanorods ; Nanosheets ; Supercapacitor

Energy Storage:525.7 ; Lithium and Alloys:542.4 ; Nanotechnology:761 ; Chemical Reactions:802.2 ; Solid State Physics:933 ; Materials Science:951

2-s2.0-85070374154

Scopus

1.School of Metallurgy and Environment & College of Chemistry and Chemical EngineeringCentral South University,Changsha,410083,China
2.State Key Laboratory for Powder MetallurgyCentral South University,Changsha,410083,China
3.Department of Materials Science and EngineeringSouthern University of Science and Technology,Shenzhen,518055,China
4.School of Energy Science and EngineeringNanjing Tech University,Nanjing,211816,China

Li，Guangchao,Huang，Yaling,Yin，Zhoulan,et al. Defective synergy of 2D graphitic carbon nanosheets promotes lithium-ion capacitors performance[J]. Energy Storage Materials,2019,24:304-311.

Li，Guangchao.,Huang，Yaling.,Yin，Zhoulan.,Guo，Huajun.,Liu，Yong.,...&Wang，J..(2019).Defective synergy of 2D graphitic carbon nanosheets promotes lithium-ion capacitors performance.Energy Storage Materials,24,304-311.

Li，Guangchao,et al."Defective synergy of 2D graphitic carbon nanosheets promotes lithium-ion capacitors performance".Energy Storage Materials 24(2019):304-311.