BROWSE

Related Scientist

Researcher

나노 구조 물리 연구단
나노구조물리 연구단
more info

Triggered reversible phase transformation between layered and spinel structure in manganese-based layered compounds

Cited 0 time in webofscience Cited 0 time in scopus
9 Viewed 1 Downloaded
Title
Triggered reversible phase transformation between layered and spinel structure in manganese-based layered compounds
Author(s)
Mi Ru Jo; Yunok Kim; Junghoon Yang; Mihee Jeong; Kyeongse Song; Yong-Mook Kang; Jin-Myoung Lim; Maenghyo Cho; Jae-Hyun Shim; Young-Min Kim; Won-Sub Yoon; Yong-Il Kim
Publication Date
2019-09
Journal
NATURE COMMUNICATIONS, v.10, no.1, pp.3385 -
Publisher
NATURE PUBLISHING GROUP
Abstract
© 2019, The Author(s).Irreversible phase transformation of layered structure into spinel structure is considered detrimental for most of the layered structure cathode materials. Here we report that this presumably irreversible phase transformation can be rendered to be reversible in sodium birnessite (NaxMnO2·yH2O) as a basic structural unit. This layered structure contains crystal water, which facilitates the formation of a metastable spinel-like phase and the unusual reversal back to layered structure. The mechanism of this phase reversibility was elucidated by combined soft and hard X-ray absorption spectroscopy with X-ray diffraction, corroborated by first-principle calculations and kinetics investigation. These results show that the reversibility, modulated by the crystal water content between the layered and spinel-like phases during the electrochemical reaction, could activate new cation sites, enhance ion diffusion kinetics and improve its structural stability. This work thus provides in-depth insights into the intercalating materials capable of reversible framework changes, thereby setting the precedent for alternative approaches to the development of cathode materials for next-generation rechargeable batteries
URI
https://pr.ibs.re.kr/handle/8788114/6614
ISSN
2041-1723
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > Journal Papers (저널논문)
Files in This Item:
Triggered reversible_Nature Communications_Young Min Kim.pdfDownload

qrcode

  • facebook

    twitter

  • Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
해당 아이템을 이메일로 공유하기 원하시면 인증을 거치시기 바랍니다.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse