Structural design of Ge-based anodes with chemical bonding for high-performance Na-ion batteries

Li，Wenwu1,2; Li，Xinwei3; Liao，Jun1; Zhao，Bote2; Zhang，Lei2; Liu，Yuchen2; Huang，Liang4; Li，Yunyong1; Liu，Meilin2

2019-07-01

10.1016/j.ensm.2019.04.034

Energy Storage Materials   影响因子和分区

24058297

2405-8297

Ge-based anodes for Na-ion batteries (NIB) usually suffer from sluggish reaction kinetics, low initial Coulombic efficiency, poor reversible capacity, and short cycling life due mainly to its rigid diamond-like structure. Here we report our findings in characterization and application of a GeP anode with a flexible layered structure, synthesized by a simple mechanochemical method. When tested as the anode for NIBs, the GeP undergoes a self-healing Na-storage process that involves intercalation, conversion, and alloying, as co-revealed by ex-situ X-ray diffraction, HRTEM, Raman spectroscopy, and X-ray photoelectron spectroscopy analysis. The peculiar self-healing phenomenon derives from its ultra-low formation energy (−0.19 eV) for reconstruction of the original layered structure, as confirmed by first-principle calculations. The low formation energy also enables the formation of chemical bonding between layered GeP and graphite, thus achieving unprecedented performances among all reported anode materials based on Group IVA- and Group VA elements. The structural design strategy guided by formation energy of desirable phases is also applicable to the development of other energy-storage materials.

Anode Chemical bonding Ge-based High-performance Na-ion batteries

EI ; SCI

英语

其他

Guangzhou Municipal Science and Technology Project[201804010392] ; [DMR-1742828] ; Foundation for Distinguished Young Talents in Higher Education of Guangdong[2016A030306030] ; Natural Science Foundation of Guangdong Province[2017A030310241] ; China Postdoctoral Science Foundation[1112000139] ; National Natural Science Foundation of China[51801096]

Chemistry ; Science & Technology - Other Topics ; Materials Science

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

WOS:000472961700036

Elsevier B.V.

20192907206962

Anodes ; Chemical bonds ; Intercalation ; Ions ; Reaction kinetics ; Self-healing materials ; Structural design ; X ray photoelectron spectroscopy

Structural Design, General:408.1 ; Metals, Plastics, Wood and Other Structural Materials:415 ; Electron Tubes:714.1 ; Physical Chemistry:801.4 ; Chemical Reactions:802.2

2-s2.0-85065798220

Scopus

1.School of Materials and EnergyGuangdong University of Technology,Guangzhou,510006,China
2.School of Materials Science & EngineeringGeorgia Institute of Technology,Atlanta,30332,United States
3.Department of Mechanical and Energy EngineeringSouthern University of Science and Technology,Shenzhen,518071,China
4.The State Key Laboratory of Refractories and MetallurgyWuhan University of Science and Technology (WUST),Wuhan,430081,China

Li，Wenwu,Li，Xinwei,Liao，Jun,et al. Structural design of Ge-based anodes with chemical bonding for high-performance Na-ion batteries[J]. Energy Storage Materials,2019,20:380-387.

Li，Wenwu.,Li，Xinwei.,Liao，Jun.,Zhao，Bote.,Zhang，Lei.,...&Liu，Meilin.(2019).Structural design of Ge-based anodes with chemical bonding for high-performance Na-ion batteries.Energy Storage Materials,20,380-387.

Li，Wenwu,et al."Structural design of Ge-based anodes with chemical bonding for high-performance Na-ion batteries".Energy Storage Materials 20(2019):380-387.