Nanoscale Zirconium-Abundant Surface Layers on Lithium- and Manganese-Rich Layered Oxides for High-Rate Lithium-Ion Batteries

Juhyeon Ahn, Jong Hak Kim, Byung Won Cho, Kyung Yoon Chung, Sangryun Kim, Jang Wook Choi, Si Hyoung Oh

Research output: Contribution to journalArticlepeer-review

37 Citations (Scopus)


Battery performance, such as the rate capability and cycle stability of lithium transition metal oxides, is strongly correlated with the surface properties of active particles. For lithium-rich layered oxides, transition metal segregation in the initial state and migration upon cycling leads to a significant structural rearrangement, which eventually degrades the electrode performance. Here, we show that a fine-tuning of surface chemistry on the particular crystal facet can facilitate ionic diffusion and thus improve the rate capability dramatically, delivering a specific capacity of ∼110 mAh g-1 at 30C. This high rate performance is realized by creating a nanoscale zirconium-abundant rock-salt-like surface phase epitaxially grown on the layered bulk. This surface layer is spontaneously formed on the Li+-diffusive crystallographic facets during the synthesis and is also durable upon electrochemical cycling. As a result, Li-ions can move rapidly through this nanoscale surface layer over hundreds of cycles. This study provides a promising new strategy for designing and preparing a high-performance lithium-rich layered oxide cathode material.

Original languageEnglish
Pages (from-to)7869-7877
Number of pages9
JournalNano letters
Issue number12
Publication statusPublished - 2017 Dec 13

Bibliographical note

Funding Information:
*E-mail: *E-mail: ORCID Juhyeon Ahn: 0000-0002-1701-3372 Jong Hak Kim: 0000-0002-5858-1747 Kyung Yoon Chung: 0000-0002-1273-746X Sangryun Kim: 0000-0001-8617-3022 Jang Wook Choi: 0000-0001-8783-0901 Si Hyoung Oh: 0000-0002-7063-9235 Funding This work was supported by the National Research Foundation of Korea (grant no. NRF-2011-C1AAA001-0030538) and KIST Institutional Program (grant no. 2E27062). Notes The authors declare no competing financial interest.

Publisher Copyright:
© 2017 American Chemical Society.

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering


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