Bi-affinity Electrolyte Optimizing High-Voltage Lithium-Rich Manganese Oxide Battery via Interface Modulation Strategy

Xuedi Yuan; Tao Dong; Jiaxin Liu; Yingyue Cui; Haotian Dong; Du Yuan; Haitao Zhang

doi:10.1002/anie.202304121

Bi-affinity Electrolyte Optimizing High-Voltage Lithium-Rich Manganese Oxide Battery via Interface Modulation Strategy

Angew Chem Int Ed Engl. 2023 Jul 24;62(30):e202304121. doi: 10.1002/anie.202304121. Epub 2023 Jun 14.

Authors

Xuedi Yuan^{1

2}, Tao Dong¹, Jiaxin Liu¹, Yingyue Cui¹, Haotian Dong^{1

2}, Du Yuan³, Haitao Zhang^{1

2

4}

Affiliations

¹ Beijing Key Laboratory of Ionic Liquids Clean Process, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, P. R. China.
² School of Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou, 450002, P. R. China.
³ College of Materials Science and Engineering, Changsha University of Science and Technology, 960, 2nd Section, Changsha, Hunan, 410004, P. R. China.
⁴ Henan Key Laboratory of Energy Storage Materials and Processes, Zhengzhou Institute of Emerging Industrial Technology, Zhengzhou, 450003, P. R. China.

PMID: 37226711
DOI: 10.1002/anie.202304121

Abstract

The practical implementation of high-voltage lithium-rich manganese oxide (LRMO) cathode is limited by the unanticipated electrolyte decomposition and dissolution of transition metal ions. The present study proposes a bi-affinity electrolyte formulation, wherein the sulfonyl group of ethyl vinyl sulfone (EVS) imparts a highly adsorptive nature to LRMO, while fluoroethylene carbonate (FEC) exhibits a reductive nature towards Li metal. This interface modulation strategy involves the synergistic use of EVS and FEC as additives to form robust interphase layers on the electrode. As-formed S-endorsed but LiF-assisted configuration cathode electrolyte interphase with a more dominant -SO₂ - component may promote the interface transport kinetics and prevent the dissolution of transition metal ions. Furthermore, the incorporation of S component into the solid electrolyte interphase and the reduction of its poorly conducting component can effectively inhibit the growth of lithium dendrites. Therefore, a 4.8 V LRMO/Li cell with optimized electrolyte may demonstrate a remarkable retention capacity of 97 % even after undergoing 300 cycles at 1 C.

Keywords: Bi-Affinity Electrolyte; Ethyl Vinyl Sulfone; Fluoroethylene Carbonate; Interphase Modulation Strategy; Lithium Rich Manganese Oxide Cathode.

Abstract

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