Transition Metal Dissolution in Lithium-Ion Cells: A Piece of the Puzzle

被引：6

作者：

Son, Seoung-Bum ^{[1
]}

Zhang, Zhengcheng ^{[1
]}

Gim, Jihyeon ^{[1
]}

Johnson, Christopher S. ^{[1
]}

Tsai, Yifen ^{[2
]}

Kalensky, Michael ^{[2
]}

Lopykinski, Susan ^{[2
]}

Kahvecioglu, Ozgenur ^{[3
]}

Yang, Laboratory Zhenzhen ^{[1
]}

Montoya, Anthony T. ^{[1
]}

Bloom, Ira ^{[1
]}

机构：

[1] Argonne Natl Lab, Chem Sci & Engn Div, Lemont, IL 60439 USA

[2] Argonne Natl Lab, Chem & Fuel Cycle Technol Div, Analyt Chem Lab, Lemont, IL 60439 USA

[3] Argonne Natl Lab, Appl Mat Div, Lemont, IL 60439 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2023年 / 127卷 / 04期

关键词：

RING-OPENING POLYMERIZATION; DEGRADATION-PRODUCTS; FORMATION MECHANISM; MASS-SPECTROMETRY; KINETICS; OXIDE; ELECTROLYTE; ZINC; LI; CARBONATE;

D O I：

10.1021/acs.jpcc.2c08234

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Static leaching tests were performed using the chemically delithiated positive electrode materials, LiFePO4, LiCoO2, LiMn2O4, LiNiO2, and LiNi0.8Mn0.1Co0.1O2. Instead of the common electrolyte, which contains LiPF6, the solvent consisted of only ethylene carbonate (EC) and ethyl methyl carbonate (EMC), limiting the possible reactions to only those that depend on the solvent. The product liquids from these experiments showed that there were lithium-bearing species in common, such as Li(EC)+ and Li(EMC)+. Interestingly, we found evidence of electrolyte degradation products in both the positive-and negative -ion mass spectral results. The positive-ion results showed that the products tended to coordinate to lithium. The negative-ion results showed that most of the products tended to complex with transition metals. It was difficult to discern which positive ion was associated with which negative ion.

引用

页码：1767 / 1775

页数：9

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