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Title: In-situ TEM on the coalescence of birnessite manganese dioxides nanosheets during lithiation process

Abstract

Highlights: • Evolution of MnO{sub 2} nanosheets during lithiation was in situ observed. • MnO{sub 2} was reacted with Li to form Mn and LiO{sub 2}. • Nanosheets expanded and aggregated due to lithiation. - Abstract: Nanostructure is believed to produce great benefits for anode materials in lithium ion batteries (LIBs) by enhancing lithium ion transfer, accommodating large volume change and increasing surface area. Whether the nanostructure (especially the porous nanostructure) could be well held during charging/discharging process is one of the most commonly concerned issues in LIBs research. The dynamic evolution of birnessite manganese dioxides nanosheets during lithiation process is investigated by in-situ transmission electron microscopy (TEM) for the first time. The TiO{sub 2}@MnO{sub 2} core-shell nanowires are used as the anode and Li metal as the counter electrode inside the TEM. Interestingly, the lithiation process is confirmed as MnO{sub 2} and Li converting to Li{sub 2}O and Mn. The original porous structure of the nanosheets is hard to preserve during lithiation process due to lithiation-induced contact flattening.

Authors:
 [1]; ;  [2];  [1];  [3];  [1]
  1. School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027 (China)
  2. College of Materials Science and Engineering, Chongqing University, Chongqing 400044 (China)
  3. Institute of Applied Mechanics, Zhejiang University, Hangzhou 310027 (China)
Publication Date:
OSTI Identifier:
22581571
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 79; Other Information: Copyright (c) 2016 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ANODES; COALESCENCE; CRYSTAL STRUCTURE; CRYSTALS; ELECTRON DIFFRACTION; LITHIUM ION BATTERIES; LITHIUM OXIDES; MANGANESE OXIDES; NANOWIRES; POROUS MATERIALS; SHEETS; SURFACE AREA; SURFACES; SYNTHESIS; TITANIUM OXIDES; TRANSMISSION ELECTRON MICROSCOPY

Citation Formats

Cao, Ke, Kuang, Min, Zhang, Yuxin, Liu, Jiabin, E-mail: liujiabin@zju.edu.cn, Wang, Hongtao, E-mail: htw@zju.edu.cn, and Meng, Liang. In-situ TEM on the coalescence of birnessite manganese dioxides nanosheets during lithiation process. United States: N. p., 2016. Web. doi:10.1016/J.MATERRESBULL.2016.02.045.
Cao, Ke, Kuang, Min, Zhang, Yuxin, Liu, Jiabin, E-mail: liujiabin@zju.edu.cn, Wang, Hongtao, E-mail: htw@zju.edu.cn, & Meng, Liang. In-situ TEM on the coalescence of birnessite manganese dioxides nanosheets during lithiation process. United States. doi:10.1016/J.MATERRESBULL.2016.02.045.
Cao, Ke, Kuang, Min, Zhang, Yuxin, Liu, Jiabin, E-mail: liujiabin@zju.edu.cn, Wang, Hongtao, E-mail: htw@zju.edu.cn, and Meng, Liang. 2016. "In-situ TEM on the coalescence of birnessite manganese dioxides nanosheets during lithiation process". United States. doi:10.1016/J.MATERRESBULL.2016.02.045.
@article{osti_22581571,
title = {In-situ TEM on the coalescence of birnessite manganese dioxides nanosheets during lithiation process},
author = {Cao, Ke and Kuang, Min and Zhang, Yuxin and Liu, Jiabin, E-mail: liujiabin@zju.edu.cn and Wang, Hongtao, E-mail: htw@zju.edu.cn and Meng, Liang},
abstractNote = {Highlights: • Evolution of MnO{sub 2} nanosheets during lithiation was in situ observed. • MnO{sub 2} was reacted with Li to form Mn and LiO{sub 2}. • Nanosheets expanded and aggregated due to lithiation. - Abstract: Nanostructure is believed to produce great benefits for anode materials in lithium ion batteries (LIBs) by enhancing lithium ion transfer, accommodating large volume change and increasing surface area. Whether the nanostructure (especially the porous nanostructure) could be well held during charging/discharging process is one of the most commonly concerned issues in LIBs research. The dynamic evolution of birnessite manganese dioxides nanosheets during lithiation process is investigated by in-situ transmission electron microscopy (TEM) for the first time. The TiO{sub 2}@MnO{sub 2} core-shell nanowires are used as the anode and Li metal as the counter electrode inside the TEM. Interestingly, the lithiation process is confirmed as MnO{sub 2} and Li converting to Li{sub 2}O and Mn. The original porous structure of the nanosheets is hard to preserve during lithiation process due to lithiation-induced contact flattening.},
doi = {10.1016/J.MATERRESBULL.2016.02.045},
journal = {Materials Research Bulletin},
number = ,
volume = 79,
place = {United States},
year = 2016,
month = 7
}