An electrode-level prelithiation of SiO anodes with organolithium compounds for lithium-ion batteries

Xiaoxiao Zhang, Huainan Qu, Weixiao Ji, Dong Zheng, Tianyao Ding, Dantong Qiu, Deyang Qu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

50 Citations (Scopus)

Abstract

Silicon monoxide (SiO) is considered an attractive alternative to conventional graphite anodes due to its high specific capacity and good cycling performance. However, it suffers from low initial Coulombic efficiency (ICE) due to a large irreversible capacity and large volume change during cycling. Both deficiencies hinder the commercial use of SiO anodes. A new organolithium compound (Li−9,9-dimethyl-9H-fluorene−tetrahydrofuran) with lower redox potential is reported to prelithiate a SiO-based anode. An SEI layer is formed during prelithiation and a controllable amount of reversible lithium is preloaded into the SiO electrode. The ICE of a prelithiated SiO-based electrode in half-cell format is increased greatly to ~90.7%. When matched with a LiNi0·6Co0·2Mn0·2O2 cathode, the full cell with the prelithiated SiO/G anode exhibits a much improved ICE in comparison with the pristine one (87.1% vs. 61.1%). This facile prelithiation method is proved to be a practical solution for the commercial application of SiO-based materials.

Original languageEnglish
Article number229067
JournalJournal of Power Sources
Volume478
DOIs
Publication statusPublished - 1 Dec 2020
Externally publishedYes

Keywords

  • Organolithium compound
  • Prelithiation
  • Roll-to-roll
  • SiO anode

Fingerprint

Dive into the research topics of 'An electrode-level prelithiation of SiO anodes with organolithium compounds for lithium-ion batteries'. Together they form a unique fingerprint.

Cite this