Single-Phase Ternary Compounds with a Disordered Lattice and Liquid Metal Phase for High-Performance Li-Ion Battery Anodes

Yanhong Li, Lei Zhang, Hung Yu Yen, Yucun Zhou, Gun Jang, Songliu Yuan, Jeng Han Wang, Peixun Xiong, Meilin Liu, Ho Seok Park*, Wenwu Li*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

Abstract: Si is considered as the promising anode materials for lithium-ion batteries (LIBs) owing to their high capacities of 4200 mAh g−1 and natural abundancy. However, severe electrode pulverization and poor electronic and Li-ionic conductivities hinder their practical applications. To resolve the afore-mentioned problems, we first demonstrate a cation-mixed disordered lattice and unique Li storage mechanism of single-phase ternary GaSiP2 compound, where the liquid metallic Ga and highly reactive P are incorporated into Si through a ball milling method. As confirmed by experimental and theoretical analyses, the introduced Ga and P enables to achieve the stronger resistance against volume variation and metallic conductivity, respectively, while the cation-mixed lattice provides the faster Li-ionic diffusion capability than those of the parent GaP and Si phases. The resulting GaSiP2 electrodes delivered the high specific capacity of 1615 mAh g−1 and high initial Coulombic efficiency of 91%, while the graphite-modified GaSiP2 (GaSiP2@C) achieved 83% of capacity retention after 900 cycles and high-rate capacity of 800 at 10,000 mA g−1. Furthermore, the LiNi0.8Co0.1Mn0.1O2//GaSiP2@C full cells achieved the high specific capacity of 1049 mAh g−1 after 100 cycles, paving a way for the rational design of high-performance LIB anode materials.[Figure not available: see fulltext.]

Original languageEnglish
Article number63
JournalNano-Micro Letters
Volume15
Issue number1
DOIs
Publication statusPublished - 2023 Dec

Keywords

  • Disordered lattice
  • GaSiP
  • Li-ion batteries
  • Liquid metal
  • Multinary compounds

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Electrical and Electronic Engineering

Fingerprint

Dive into the research topics of 'Single-Phase Ternary Compounds with a Disordered Lattice and Liquid Metal Phase for High-Performance Li-Ion Battery Anodes'. Together they form a unique fingerprint.

Cite this