Pure tetravalent nickel in γ-type nickel oxyhydroxide as secondary battery electrode

Kyoo Seung Han, Masahiro Yoshimura, Joo Byoung Yoon, Jin Ho Choy, Kwang Ja Park

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


Pure tetravelent nickel in γ-type cobalt substituted nickel oxyhydroxide, Ni0.70Co0.30O2K0.30(H 2O)0.42, could be obtained by the "chimie douce" reaction. The presence of tetravalent nickel is confirmed by comparing the Ni K-edge XANES spectrum of the sample with those of reference coumpounds having various nickel valency and similar layer structure. The Co K-edge XANES spectrum indicates that the trivalent cobalt remains unchanged regardless of the nickel valency. The structural modification during chimie douce reaction observed from XRD patterns and the result of iodometric titration are consistent with the Ni and Co K-edge XANES data.

Original languageEnglish
Pages (from-to)880-882
Number of pages3
JournalJournal of Materials Research
Issue number4
Publication statusPublished - 1998 Apr

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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