Interfacial kinetics induced phase separation enhancing low-temperature performance of lithium-ion batteries

Kaikai Li, Dongmei Lin, He Huang, Dongqing Liu, Baohua Li, San Qiang Shi, Feiyu Kang, Tong Yi Zhang, Limin Zhou

Research output: Journal article publicationJournal articleAcademic researchpeer-review

5 Citations (Scopus)

Abstract

Understanding the temperature dependence of phase transitions occurred in electrode materials is crucial for improving the low-temperature performance of Li-ion batteries. In this work, we find an unusual temperature dependence in the phase transition of TiO2 nanoparticles on dynamic Li+ intercalation, with a decrease in temperature resulting in the formation of a supersaturated solid solution phase. Kinetic analyses reveal that Li redistribution is facilitated at high temperature while limited at low temperature. This difference manifests as a thermodynamically-controlled phase separation at high temperature and a kinetically-controlled formation of a supersaturated solid solution phase at low temperature. Facilitating the phase separation by enhancing the interfacial kinetics proves effective to improve the low-temperature performance. This study provides a comprehensive and in-depth understanding of the temperature dependence of the lithiation-induced phase transition, which has important implications for the development of the next generation of all-climate rechargeable batteries.

Original languageEnglish
Article number104977
JournalNano Energy
Volume75
DOIs
Publication statusPublished - Sep 2020

Keywords

  • Interfacial kinetics
  • Lithiation
  • Phase transitions
  • Raman spectroscopy
  • Supersaturated solid solution phase
  • Temperature dependence

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)
  • Electrical and Electronic Engineering

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