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  Deciphering the Interface of a High-Voltage (5 V-Class) Li-Ion Battery Containing Additive-Assisted Sulfolane-Based Electrolyte

Lu, D., Xu, G., Hu, Z., Cui, Z., Wang, X., Li, J., et al. (2019). Deciphering the Interface of a High-Voltage (5 V-Class) Li-Ion Battery Containing Additive-Assisted Sulfolane-Based Electrolyte. Small Methods, 1900546, pp. 1-11. doi:10.1002/smtd.201900546.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0004-BDB7-9 Version Permalink: http://hdl.handle.net/21.11116/0000-0004-BDB9-7
Genre: Journal Article

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 Creators:
Lu, Di1, Author
Xu, Gaojie1, Author
Hu, Zhiwei2, Author              
Cui, Zili1, Author
Wang, Xiao1, Author
Li, Jiedong1, Author
Huang, Lang1, Author
Du, Xiaofan1, Author
Wang, Yantao1, Author
Ma, Jun1, Author
Lu, Xiaolan1, Author
Lin, Hong-Ji1, Author
Chen, Chien-Te1, Author
Nugroho, Agustinus Agung1, Author
Tjeng, Liu Hao3, Author              
Cui, Guanglei1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Zhiwei Hu, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863461              
3Liu Hao Tjeng, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863452              

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 Abstract: Next generation high energy density lithium-ion batteries have aroused great interests worldwide. Herein, in a high-voltage (5 V-class) LiNi0.5Mn1.5O4/MCMB (graphitic mesocarbon microbeads) battery system using 1 m lithium difluoro(oxalate)borate/sulfolane, tris(trimethylsilyl) phosphite (TMSP) additive is added to significantly improve room/high temperature cycling performances. The unchanged X-ray diffraction patterns suggest the bulk crystal structure of cycled MCMB anode and LiNi0.5Mn1.5O4 cathode are well preserved. Moreover, soft X-ray absorption spectroscopy (XAS) taken from bulk sensitive fluorescence-yield (FY) mode reveals the unchanged bulk electronic structure of cycled LiNi0.5Mn1.5O4 cathode. Therefore, it is concluded that only interface instability contributes to capacity fading of full-cells. However, electrode/electrolyte interface and corresponding interfacial reaction processes are always “enigmatic.” First, X-ray photoelectron spectroscopy (XPS) and in situ differential electrochemical mass spectrometry (DEMS) are used to more accurately decipher the TMSP additive action mechanism in MCMB/electrolyte interfacial reaction processes, by identifying the interfacial solid and gas byproducts, respectively. Then, the crucial role of TMSP additive in modifying cathode/electrolyte interface is revealed by XPS and soft XAS taken from surface sensitive total electron yield (TEY) mode. This paper provides valuable perspectives for formulating novel electrolytes, and for more accurately depicting additive action mechanism in “enigmatic” electrode/electrolyte interfacial reaction processes. © 2019 WILEY-VCH Verlag GmbH Co. KGaA, Weinheim

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Language(s): eng - English
 Dates: 2019-09-012019-09-01
 Publication Status: Published in print
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 Rev. Method: -
 Identifiers: DOI: 10.1002/smtd.201900546
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Title: Small Methods
Source Genre: Journal
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Publ. Info: John Wiley and Sons Inc.
Pages: - Volume / Issue: - Sequence Number: 1900546 Start / End Page: 1 - 11 Identifier: ISSN: 23669608