Li-ion and Na-ion insertion into size-controlled nickel hexacyanoferrate nanoparticles

Carissa H. Li, Yusuke Nanba, Daisuke Asakura, Masashi Okubo, Daniel R. Talham

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)

Abstract

The influence of particle size on the electrochemical properties of guest-ion storage materials has attracted much attention because of the extensive need for long cycle-life, high energy density, and high power batteries. The present work describes a systematic study of the effect of particle size on the guest-ion storage capabilities of a cyanide-bridged coordination polymer. A series of nickel hexacyanoferrate particles ranging from approximately 40 to 400 nm were synthesized by a co-precipitation method and were used as the cathode material for both Li-ion and Na-ion insertion/extraction experiments using organic electrolyte. A large polarization was observed for the largest particles during Li-ion cycling, indicating a heterogeneous ion concentration within the lattice. As a consequence, the available capacity of Li-ion intercalation at high rates is significantly improved by reducing the particle size. On the other hand, Na-ion intercalation shows excellent rate capability regardless of the particle size.

Original languageEnglish
Pages (from-to)24955-24961
Number of pages7
JournalRSC Advances
Volume4
Issue number48
DOIs
Publication statusPublished - 2014
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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