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 journalArticle

16 Citations (Scopus)

Abstract

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
Volume17
Issue number12
DOIs
Publication statusPublished - 2017 Dec 13

Fingerprint

Manganese
Lithium
Zirconium
Oxides
electric batteries
manganese
surface layers
lithium
cycles
Transition metals
oxides
flat surfaces
ions
transition metals
ionic diffusion
Surface chemistry
Surface properties
halites
Cathodes
Tuning

All Science Journal Classification (ASJC) codes

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

Cite this

Ahn, Juhyeon ; Kim, Jong Hak ; Cho, Byung Won ; Chung, Kyung Yoon ; Kim, Sangryun ; Choi, Jang Wook ; Oh, Si Hyoung. / Nanoscale Zirconium-Abundant Surface Layers on Lithium- and Manganese-Rich Layered Oxides for High-Rate Lithium-Ion Batteries. In: Nano letters. 2017 ; Vol. 17, No. 12. pp. 7869-7877.
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Nanoscale Zirconium-Abundant Surface Layers on Lithium- and Manganese-Rich Layered Oxides for High-Rate Lithium-Ion Batteries. / Ahn, Juhyeon; Kim, Jong Hak; Cho, Byung Won; Chung, Kyung Yoon; Kim, Sangryun; Choi, Jang Wook; Oh, Si Hyoung.

In: Nano letters, Vol. 17, No. 12, 13.12.2017, p. 7869-7877.

Research output: Contribution to journalArticle

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