journal article·2021-01-25

Effect of Fluoroethylene Carbonate on Solid Electrolyte Interphase Formation of the SiO/C Anode Observed by In Situ Atomic Force Microscopy

Rui Zhao, Shuwei Wang, Dongqing Liu, Yuanming Liu, Xiaohui Lv, Xiaojie Zeng, Baohua Li

ACS Applied Energy Materials· Volume 4· Issue 1
Publisher page

Abstract

Silicon oxide-based materials are promising anode materials for the real application in lithium-ion batteries. The solid electrolyte interphase is vital for the cyclability and rate capability of the electrode material. Here, in this study, the effect of fluoroethylene carbonate (FEC) as the well-known electrolyte additive on the interface film formation of the commercial SiO/C anode was investigated. The potential-dependent morphology of the SEI layer were obtained via in situ atomic force microscopy (AFM) for the first two cycles and ex situ AFM for the 10th, 30th, and 50th cycles. The morphology analysis was complemented by the chemical composition evolution by ex situ X-ray photoelectron spectroscopy and Young’s modulus calculation via PeakForce quantitative nanomechanical mapping of AFM. The results indicated a dense, compact, and stiff SEI layer on the surface of SiO/C in FEC-based electrolyte, in contrast to the scattered and thin SEI layer in ethylene carbonate-based electrolyte.
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Research context

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

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Affiliations

Shenzhen Key Laboratory on Power Battery Safety Research and Shenzhen Geim Graphene Center, Tsinghua Shenzhen International Graduate School, Shenzhen 518055, China

Laboratory of Advanced Materials, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China

College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen 518060, China

Funding

Shenzhen Key Laboratory on Power Battery Safety Research, Graduate School, Tsinghua Shenzhen · Special Fund Project for Strategic Emerging Industry Development of Shenzhen · Guangdong Province · Shenzhen Technical Plan Project · National Nature Science Foundation of China · Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program · Dongguan Core Technology Key Funding Project

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