DataVXACS Applied Materials & InterfacesPaper
journal article·2021-06-02

trans-Difluoroethylene Carbonate as an Electrolyte Additive for Microsized SiOx@C Anodes

Lin-Bo Huang, Ge Li, Zhuo-Ya Lu, Jin-Yi Li, Lu Zhao, Yu Zhang, Xu-Dong Zhang, Ke-Cheng Jiang, Quan Xu, Yu-Guo Guo

ACS Applied Materials & Interfaces· Volume 13· Issue 21
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Source abstract

Abstract

Microsized SiOx has been vigorously investigated as an advanced anode material for next-generation lithium-ion batteries. However, its practical application is seriously hampered by its huge volume variation during the repeated (de)lithiation process, which destroys the microparticle structure and results in rapid capacity fading. Herein, we propose the usage of trans-difluoroethylene carbonate (DFEC) as an electrolyte additive to maintain the structural integrity of microsized SiOx with a uniform carbon layer (SiOx@C). Compared with ethylene carbonate and fluoroethylene carbonate, DFEC has lower lowest unoccupied molecular orbital energy and higher reduction potential, which is easily reduced and promotes the in situ formation of a more stable LiF-rich solid electrolyte interphase (SEI) on the surface of anode materials. The LiF-rich SEI exhibits enhanced mechanical rigidity and ionic conductivity, thus enabling the microsized SiOx@C anodes’ excellent lithium storage stability and high average Coulombic efficiency.
Source: openalex_inverted_index · Quality: baseline

Research context

Energy storage

OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Advanced Battery Technologies Research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing 100190, P. R. China

University of Chinese Academy of Sciences, Beijing 100049, P. R. China

Beijing IAmetal New Energy Technology Company LTD., Beijing 100190, P. R. China

Dongguan TAFEL New Energy Technology Company LTD., Dongguan 523000, P. R. China

Funding

National Natural Science Foundation of China · National Key R&D Program of China · Innovation team for R&D and industrialization of High Energy Density Si-based Power batteries · ?Transformational Technologies for Clean Energy and Demonstration?, Strategic Priority Research Program of the Chinese Academy of Sciences

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