A self-healing layered GeP anode for high-performance Li-ion batteries enabled by low formation energy

Li, Wenwu1,2; Li, Xinwei3; Yu, Jiale1; Liao, Jun1; Zhao, Bote2; Huang, Liang5; Abdelhafiz, Ali2; Zhang, Haiyan1; Wang, Jeng-Han6; Guo, Zaiping4; Liu, Meilin2

2019-07

10.1016/j.nanoen.2019.04.080

Nano Energy   影响因子和分区

2211-2855

2211-3282

Ge is considered a promising anode candidate for Li-ion batteries (LIBs); however, its practical applicability is hindered by the relatively slow Li-ion diffusion owing to the stiffness of the diamond-like structure. Inspired by little difference in electronegativity between Ge and P, we have designed a novel layered GeP anode for LIBs, which can be readily synthesized using a mechano-chemical method and a subsequent low-temperature annealing. In particular, GeP demonstrates the best performances among all Ge-based anode materials studied, attributed to its fast Li-ion diffusion compared to Ge counterpart and a unique Li-storage mechanism that involves intercalation, conversion, and alloying, as confirmed by XRD, TEM, XPS, and Raman spectroscopy. Specially, the initial layered crystal structure of GeP can be reconstructed during charging due to its low formation energy, thus offering remarkable reversibility during cycling. Further, this study implies that the formation energy of crystal structures could be an important parameter for strategic design of large-capacity anode materials for LIBs.

Self-healing Layered structure Ge-based Anode Li-ion batteries

SCI ; EI

英语

通讯

US National Science Foundation[DMR-1742828]

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

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

WOS:000471201800069

ELSEVIER SCIENCE BV

20192006923902

Anodes ; Chemical bonds ; Crystal structure ; Electronegativity ; Germanium ; Ions ; Self-healing materials ; Strategic materials ; Temperature

Metals, Plastics, Wood and Other Structural Materials:415 ; Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Thermodynamics:641.1 ; Electron Tubes:714.1 ; Physical Chemistry:801.4 ; Electrochemistry:801.4.1 ; Crystal Lattice:933.1.1 ; Materials Science:951

Web of Science

1.Guangdong Univ Technol, Sch Mat & Energy, Guangzhou 510006, Guangdong, Peoples R China
2.Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA
3.Southern Univ Sci & Technol, Dept Mech & Energy Engn, Shenzhen 518071, Peoples R China
4.Univ Wollongong, Sch Mech Mat & Mechatron Engn, Inst Superconducting & Elect Mat, North Wollongong, NSW 2500, Australia
5.WUST, State Key Lab Refractories & Met, Wuhan 430081, Hubei, Peoples R China
6.Natl Taiwan Normal Univ, Dept Chem, Taipei 11677, Taiwan

Li, Wenwu,Li, Xinwei,Yu, Jiale,et al. A self-healing layered GeP anode for high-performance Li-ion batteries enabled by low formation energy[J]. Nano Energy,2019,61:594-603.

Li, Wenwu.,Li, Xinwei.,Yu, Jiale.,Liao, Jun.,Zhao, Bote.,...&Liu, Meilin.(2019).A self-healing layered GeP anode for high-performance Li-ion batteries enabled by low formation energy.Nano Energy,61,594-603.

Li, Wenwu,et al."A self-healing layered GeP anode for high-performance Li-ion batteries enabled by low formation energy".Nano Energy 61(2019):594-603.