Cracks of Silicon Nanoparticles in Anodes: Mechanics–Electrochemical-Coupled Modeling Framework Based on the Phase-Field Method
Source abstract
Abstract
Silicon has become one of the most promising anode materials owing to its high energy density. Nevertheless, the large expansion of it during lithiation leads to crack initiation and propagation, causing capacity degradation of batteries. To understand the underlying mechanism of the cracks in Si particles, herein, we establish a multiphysics model framework based on the phase-field method to study the cracking initiation and evolution in pure silicon nanoparticles. Quantitative relations between cracking evolution characteristics and particle size and lithiation rates are unlocked. A smart charging (lithiation) strategy that may mitigate the crack initiation in silicon nanoparticles is suggested. The results reveal the fundamental relations between the structural properties of silicon nanoparticles and their cracking behaviors and provide a guiding tool for next-generation silicon design and evaluation.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Advancements in Battery Materials · Advanced Battery Technologies Research · Semiconductor materials and interfaces
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Vehicle Energy and Safety Laboratory (VESL), Beihang University, Beijing 100191, China
Department of Automotive Engineering, School of Transportation Science and Engineering, Beihang University, Beijing 100191, China
Key Laboratory of Impact and Safety Engineering, Ministry of Education, School of Mechanical Engineering and Mechanics, Ningbo University, Ningbo, Zhejiang 315211, China
Department of Mechanical Engineering and Engineering Science, The University of North Carolina at Charlotte, Charlotte, North Carolina 28223, United States
Vehicle Energy and Safety Laboratory (VESL), North Carolina Motorsports and Automotive Research Center, The University of North Carolina at Charlotte, Charlotte, North Carolina 28223, United States
Funding
China Postdoctoral Science Foundation · Ningbo University · National Natural Science Foundation of China
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