Self-Healing Silicon Anode via the Addition of GaInSn-Encapsulated Microcapsules

Jian YANG, Junfeng LI, Ziyu YANG, Jiarun LIU, Yong XIANG*, Fang WU*

*Corresponding author for this work

Research output: Journal PublicationsJournal Article (refereed)peer-review

4 Citations (Scopus)


Silicon materials as promising anodes for lithium-ion batteries own a high specific capacity and a low discharge potential, while their application is restricted by their huge volumetric expansion and poor conductivity. In this study, a self-healing GaInSn-MS/Si hybrid electrode using an additive of microencapsulated gallium- liquid metal (GaInSn) with high electrical conductivity and mobility (LM microcapsule) was fabricated via an aqueous casting process. With the added LM microcapsule in the GaInSn-MS/Si hybrid electrode, the dispersed GaInSn could not only avoid its oxidation into a solid-state gallium oxide with decreased conductivity but also make it easy for uniform dispersion and quick fluidity. Consequently, the constructed self-healing GaInSn-MS/Si anode does not require manual splicing when the anode forms cracks, realizing a spontaneous self-healing performance, and the GaInSn-MS/Si hybrid electrode displays superior cycle stability and structural integrity, which retains a capacity of 806.7 mAh g-1 after 100 cycles at 2.1 A g-1. The constructed self-healing Si electrode structure design via LM microcapsule additives would provide a simple synthesis strategy for manufacturing advanced Si electrodes.

Original languageEnglish
Pages (from-to)12945-12952
Number of pages8
JournalACS Applied Energy Materials
Issue number10
Early online date10 Oct 2022
Publication statusPublished - 24 Oct 2022
Externally publishedYes

Bibliographical note

This study was supported by the National Natural Science Foundation of China (22008026).


  • additives
  • liquid metal
  • lithium-ion batteries
  • microcapsules
  • self-healing
  • silicon


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