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*

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

8 引文 斯高帕斯(Scopus)

摘要

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.]

原文英語
文章編號63
期刊Nano-Micro Letters
15
發行號1
DOIs
出版狀態已發佈 - 2023 12月

ASJC Scopus subject areas

  • 電子、光磁材料
  • 表面、塗料和薄膜
  • 電氣與電子工程

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