High-strength all-solid lithium ion electrodes based on Li 4Ti5O12

Li Sun, Nikhil Karanjgaokar, Ke Sun, Ioannis Chasiotis, W. Craig Carter, Shen Dillon

Research output: Contribution to journalArticlepeer-review

Abstract

A Li4Ti5O12-Li0.29La 0.57TiO3-Ag electrode composite was fabricated via sintering the corresponding powder mixture. The process achieved a final relative density of 97% the theoretical. Relatively thick, ∼100 μm, electrodes were fabricated to enhance the energy density relatively to the traditional solid-state thin film battery electrodes. The sintered electrode composite delivered full capacity in the first discharge at C/40 discharge rate. Full capacity utilization resulted from the 3D percolated network of both solid electrolyte and metal, which provide paths for ionic and electronic transport, respectively. The electrodes retained 85% of the theoretical capacity after 10 cycles at C/40 discharge rate. The tensile strength and the Young's modulus of the sintered electrode composite are the highest reported values to date, and are at least an order of magnitude higher than the corresponding value of traditional tapecast "composite electrodes". The results demonstrate the concept of utilizing thick all-solid electrodes for high-strength batteries, which might be used as multifunctional structural and energy storage materials.

Original languageEnglish (US)
Pages (from-to)6507-6511
Number of pages5
JournalJournal of Power Sources
Volume196
Issue number15
DOIs
StatePublished - Aug 1 2011

Keywords

  • Electrode
  • Li-ion battery
  • LiTiO
  • Sintering
  • Solid electrolyte
  • Strength

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment
  • Physical and Theoretical Chemistry

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