Effects of a sodium phosphate electrolyte additive on elevated temperature performance of spinel lithium manganese oxide cathodes

Minsang Jo; Seong Hyo Park; Hochun Lee

doi:10.3390/ma14164670

Effects of a sodium phosphate electrolyte additive on elevated temperature performance of spinel lithium manganese oxide cathodes

Minsang Jo
, Seong Hyo Park
, Hochun Lee

Department of Energy and Science and Engineering

Daegu Gyeongbuk Institute of Science and Technology

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

LiMn₂ O₄ (LMO) spinel cathode materials suffer from severe degradation at elevated temperatures because of Mn dissolution. In this research, monobasic sodium phosphate (NaH₂ PO₄, P2) is examined as an electrolyte additive to mitigate Mn dissolution; thus, the thermal stability of the LMO cathode material is improved. The P2 additive considerably improves the cyclability and storage performances of LMO/graphite and LMO/LMO symmetric cells at 60^◦ C. We explain that P2 suppresses the hydrofluoric acid content in the electrolyte and forms a protective cathode electrolyte interphase layer, which mitigates the Mn dissolution behavior of the LMO cathode material. Considering its beneficial role, the P2 additive is a useful additive for spinel LMO cathodes that suffer from severe Mn dissolution.

Original language	English
Article number	4670
Journal	Materials
Volume	14
Issue number	16
DOIs	https://doi.org/10.3390/ma14164670
State	Published - 2 Aug 2021

Bibliographical note

Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Keywords

Electrolyte additive
Lithium-ion battery
Manganese dissolution
Sodium phosphate
Spinel lithium manganese oxide
Thermal stability

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.3390/ma14164670

Cite this

@article{d3002564adfd4afdabf2fe71b858c05d,

title = "Effects of a sodium phosphate electrolyte additive on elevated temperature performance of spinel lithium manganese oxide cathodes",

abstract = "LiMn2 O4 (LMO) spinel cathode materials suffer from severe degradation at elevated temperatures because of Mn dissolution. In this research, monobasic sodium phosphate (NaH2 PO4, P2) is examined as an electrolyte additive to mitigate Mn dissolution; thus, the thermal stability of the LMO cathode material is improved. The P2 additive considerably improves the cyclability and storage performances of LMO/graphite and LMO/LMO symmetric cells at 60◦ C. We explain that P2 suppresses the hydrofluoric acid content in the electrolyte and forms a protective cathode electrolyte interphase layer, which mitigates the Mn dissolution behavior of the LMO cathode material. Considering its beneficial role, the P2 additive is a useful additive for spinel LMO cathodes that suffer from severe Mn dissolution.",

keywords = "Electrolyte additive, Lithium-ion battery, Manganese dissolution, Sodium phosphate, Spinel lithium manganese oxide, Thermal stability",

author = "Minsang Jo and Park, \{Seong Hyo\} and Hochun Lee",

note = "Publisher Copyright: {\textcopyright} 2021 by the authors. Licensee MDPI, Basel, Switzerland.",

year = "2021",

month = aug,

day = "2",

doi = "10.3390/ma14164670",

language = "English",

volume = "14",

journal = "Materials",

issn = "1996-1944",

publisher = "Multidisciplinary Digital Publishing Institute (MDPI)",

number = "16",

}

TY - JOUR

T1 - Effects of a sodium phosphate electrolyte additive on elevated temperature performance of spinel lithium manganese oxide cathodes

AU - Jo, Minsang

AU - Park, Seong Hyo

AU - Lee, Hochun

PY - 2021/8/2

Y1 - 2021/8/2

N2 - LiMn2 O4 (LMO) spinel cathode materials suffer from severe degradation at elevated temperatures because of Mn dissolution. In this research, monobasic sodium phosphate (NaH2 PO4, P2) is examined as an electrolyte additive to mitigate Mn dissolution; thus, the thermal stability of the LMO cathode material is improved. The P2 additive considerably improves the cyclability and storage performances of LMO/graphite and LMO/LMO symmetric cells at 60◦ C. We explain that P2 suppresses the hydrofluoric acid content in the electrolyte and forms a protective cathode electrolyte interphase layer, which mitigates the Mn dissolution behavior of the LMO cathode material. Considering its beneficial role, the P2 additive is a useful additive for spinel LMO cathodes that suffer from severe Mn dissolution.

AB - LiMn2 O4 (LMO) spinel cathode materials suffer from severe degradation at elevated temperatures because of Mn dissolution. In this research, monobasic sodium phosphate (NaH2 PO4, P2) is examined as an electrolyte additive to mitigate Mn dissolution; thus, the thermal stability of the LMO cathode material is improved. The P2 additive considerably improves the cyclability and storage performances of LMO/graphite and LMO/LMO symmetric cells at 60◦ C. We explain that P2 suppresses the hydrofluoric acid content in the electrolyte and forms a protective cathode electrolyte interphase layer, which mitigates the Mn dissolution behavior of the LMO cathode material. Considering its beneficial role, the P2 additive is a useful additive for spinel LMO cathodes that suffer from severe Mn dissolution.

KW - Electrolyte additive

KW - Lithium-ion battery

KW - Manganese dissolution

KW - Sodium phosphate

KW - Spinel lithium manganese oxide

KW - Thermal stability

UR - https://www.scopus.com/pages/publications/85113411184

U2 - 10.3390/ma14164670

DO - 10.3390/ma14164670

M3 - Article

AN - SCOPUS:85113411184

SN - 1996-1944

VL - 14

JO - Materials

JF - Materials

IS - 16

M1 - 4670

ER -

Effects of a sodium phosphate electrolyte additive on elevated temperature performance of spinel lithium manganese oxide cathodes

Abstract

Bibliographical note

Keywords

UN SDGs

Access to Document

Other files and links

Fingerprint

Cite this