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Title: Effect of Passivating Shells on the Chemistry and Electrode Properties of LiMn2O4 Nanocrystal Heterostructures

Abstract

Building a stable chemical environment at the cathode/electrolyte interface is directly linked to the durability of Li-ion batteries with high energy density. Recently, colloidal chemistry methods have enabled the design of core–shell nanocrystals of Li1+xMn2–xO4, an important battery cathode, with passivating shells rich in Al3+ through a colloidal synthetic route. These heterostructures combine the presence of redox-inactive ions on the surface to minimize undesired reactions, with the coverage of each individual particle in an epitaxial manner. Although they improve electrode performance, the exact chemistry and structure of the shell as well as the precise effect of the ratio between the shell and the active core remain to be elucidated. Correlation of these parameters to electrode properties would serve to tailor the heterostructure design toward complete shutdown of undesired reactions. These knowledge gaps are the target here. Li1+xMn2–xO4 nanocrystals with Al3+-rich shells of different thicknesses were synthesized. Multimodal characterization comprehensively revealed the elemental distribution, electronic state, and crystallinity in the heterostructures, which confirmed the potential of this approach to finely tune passivating layers. All of the modified nanocrystals improved the capacity retention while retaining charge storage compared to the bare counterpart, even under harsh conditions.

Authors:
 [1]; ORCiD logo [2];  [3];  [2];  [4];  [5]; ORCiD logo [6];  [3]; ORCiD logo [1]
  1. Univ. of Illinois, Chicago, IL (United States). Dept. of Chemistry
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Chemical Science and Engineering Division
  3. Univ. of Illinois, Chicago, IL (United States). Dept. of Physics
  4. Chungnam National Univ., Daejeon (Korea, Republic of). School of Material Science and Engineering
  5. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source
  6. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source; Univ. of California, Santa Cruz, CA (United States). Dept. of Chemistry and Biochemistry
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of Illinois, Chicago, IL (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V); USDOE Office of Science (SC); National Science Foundation (NSF)
OSTI Identifier:
1493918
Grant/Contract Number:  
AC02-06CH11357; AC02-05CH11231; CBET-1605126; DMR-0959470; DMR-1626065
Resource Type:
Accepted Manuscript
Journal Name:
ACS Applied Materials and Interfaces
Additional Journal Information:
Journal Volume: 11; Journal Issue: 4; Journal ID: ISSN 1944-8244
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; Al-rich passivating layers; capacity retentions; cathode/electrolyte interface; colloidal synthesis; heterostructure nanocrystals; Li-ion batteries; spinel LiMn2O4

Citation Formats

Kwon, Bob Jin, Dogan, Fulya, Jokisaari, Jacob R., Key, Baris, Kim, Chunjoong, Liu, Yi-Sheng, Guo, Jinghua, Klie, Robert F., and Cabana, Jordi. Effect of Passivating Shells on the Chemistry and Electrode Properties of LiMn2O4 Nanocrystal Heterostructures. United States: N. p., 2019. Web. doi:10.1021/acsami.8b14668.
Kwon, Bob Jin, Dogan, Fulya, Jokisaari, Jacob R., Key, Baris, Kim, Chunjoong, Liu, Yi-Sheng, Guo, Jinghua, Klie, Robert F., & Cabana, Jordi. Effect of Passivating Shells on the Chemistry and Electrode Properties of LiMn2O4 Nanocrystal Heterostructures. United States. https://doi.org/10.1021/acsami.8b14668
Kwon, Bob Jin, Dogan, Fulya, Jokisaari, Jacob R., Key, Baris, Kim, Chunjoong, Liu, Yi-Sheng, Guo, Jinghua, Klie, Robert F., and Cabana, Jordi. Mon . "Effect of Passivating Shells on the Chemistry and Electrode Properties of LiMn2O4 Nanocrystal Heterostructures". United States. https://doi.org/10.1021/acsami.8b14668. https://www.osti.gov/servlets/purl/1493918.
@article{osti_1493918,
title = {Effect of Passivating Shells on the Chemistry and Electrode Properties of LiMn2O4 Nanocrystal Heterostructures},
author = {Kwon, Bob Jin and Dogan, Fulya and Jokisaari, Jacob R. and Key, Baris and Kim, Chunjoong and Liu, Yi-Sheng and Guo, Jinghua and Klie, Robert F. and Cabana, Jordi},
abstractNote = {Building a stable chemical environment at the cathode/electrolyte interface is directly linked to the durability of Li-ion batteries with high energy density. Recently, colloidal chemistry methods have enabled the design of core–shell nanocrystals of Li1+xMn2–xO4, an important battery cathode, with passivating shells rich in Al3+ through a colloidal synthetic route. These heterostructures combine the presence of redox-inactive ions on the surface to minimize undesired reactions, with the coverage of each individual particle in an epitaxial manner. Although they improve electrode performance, the exact chemistry and structure of the shell as well as the precise effect of the ratio between the shell and the active core remain to be elucidated. Correlation of these parameters to electrode properties would serve to tailor the heterostructure design toward complete shutdown of undesired reactions. These knowledge gaps are the target here. Li1+xMn2–xO4 nanocrystals with Al3+-rich shells of different thicknesses were synthesized. Multimodal characterization comprehensively revealed the elemental distribution, electronic state, and crystallinity in the heterostructures, which confirmed the potential of this approach to finely tune passivating layers. All of the modified nanocrystals improved the capacity retention while retaining charge storage compared to the bare counterpart, even under harsh conditions.},
doi = {10.1021/acsami.8b14668},
journal = {ACS Applied Materials and Interfaces},
number = 4,
volume = 11,
place = {United States},
year = {Mon Jan 07 00:00:00 EST 2019},
month = {Mon Jan 07 00:00:00 EST 2019}
}

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