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Katsuyama Y, Yang Z, Thiel M, Zhang X, Chang X, Lin CW, Huang A, Wang C, Li Y, Kaner RB. A Rapid, Scalable Laser-Scribing Process to Prepare Si/Graphene Composites for Lithium-Ion Batteries. Small 2024:e2305921. [PMID: 38342674 DOI: 10.1002/smll.202305921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Revised: 01/25/2024] [Indexed: 02/13/2024]
Abstract
Silicon has gained significant attention as a lithium-ion battery anode material due to its high theoretical capacity compared to conventional graphite. Unfortunately, silicon anodes suffer from poor cycling performance caused by their extreme volume change during lithiation and de-lithiation. Compositing silicon particles with 2D carbon materials, such as graphene, can help mitigate this problem. However, an unaddressed challenge remains: a simple, inexpensive synthesis of Si/graphene composites. Here, a one-step laser-scribing method is proposed as a straightforward, rapid (≈3 min), scalable, and less-energy-consuming (≈5 W for a few minutes under air) process to prepare Si/laser-scribed graphene (LSG) composites. In this research, two types of Si particles, Si nanoparticles (SiNPs) and Si microparticles (SiMPs), are used. The rate performance is improved after laser scribing: SiNP/LSG retains 827.6 mAh g-1 at 2.0 A gSi+C -1 , while SiNP/GO (before laser scribing) retains only 463.8 mAh g-1 . This can be attributed to the fast ion transport within the well-exfoliated 3D graphene network formed by laser scribing. The cyclability is also improved: SiNP/LSG retains 88.3% capacity after 100 cycles at 2.0 A gSi+C -1 , while SiNP/GO retains only 57.0%. The same trend is found for SiMPs: the SiMP/LSG shows better rate and cycling performance than SiMP/GO composites.
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Affiliation(s)
- Yuto Katsuyama
- Department of Chemistry & Biochemistry, University of California Los Angeles, Los Angeles, CA, 90095, USA
| | - Zhiyin Yang
- Department of Chemistry & Biochemistry, University of California Los Angeles, Los Angeles, CA, 90095, USA
| | - Markus Thiel
- Department of Chemistry & Biochemistry, University of California Los Angeles, Los Angeles, CA, 90095, USA
| | - Xinyue Zhang
- Department of Chemical and Biomolecular Engineering, University of California Los Angeles, Los Angeles, CA, 90095, USA
| | - Xueying Chang
- Department of Chemistry & Biochemistry, University of California Los Angeles, Los Angeles, CA, 90095, USA
| | - Cheng-Wei Lin
- Department of Chemistry & Biochemistry, University of California Los Angeles, Los Angeles, CA, 90095, USA
| | - Ailun Huang
- Department of Chemistry & Biochemistry, University of California Los Angeles, Los Angeles, CA, 90095, USA
| | - Chenxiang Wang
- Department of Chemistry & Biochemistry, University of California Los Angeles, Los Angeles, CA, 90095, USA
| | - Yuzhang Li
- Department of Chemical and Biomolecular Engineering, University of California Los Angeles, Los Angeles, CA, 90095, USA
| | - Richard B Kaner
- Department of Chemistry & Biochemistry, University of California Los Angeles, Los Angeles, CA, 90095, USA
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