Improving capacity and rate capability of Li-ion cathode materials through ball milling and carbon coating – Best practice for research purposes

Christian Henriksen, Jette K. Mathiesen, Dorthe B. Ravnsbæk*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Within battery research, there is an intense focus on design, synthesis and characterization of novel electrode materials. In order to function, an electrode material must exhibit a certain level of electronic conductivity to facilitate the electron transport in the battery. To increase the electronic conductivity of novel materials, post-synthesis treatments are often required in order to allow meaningful investigation of e.g. structural or morphological changes at deep charge/discharge. Such treatments often aim at particle size reduction and carbon coating. Thus, there is a great interest for general knowledge about the outcome of simple optimization strategies. Herein, we investigate how material purity, particle size, battery capacity and rate capability are affected by optimization via carbon coating and ball milling at various stages of the material preparation. We utilize Li3V2(PO4)3 as case material, and our findings reveal that short milling times and carbon coating provides the best result.

Original languageEnglish
Article number115152
JournalSolid State Ionics
Volume344
Number of pages6
ISSN0167-2738
DOIs
Publication statusPublished - Jan 2020

Keywords

  • Carbon coating
  • Cathode materials
  • Li-ion batteries
  • Particle size

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