1. In situ formed Si nanoparticle network with micron-sized Si particles for lithium-ion battery anodes
- Author
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Andrew M. Minor, Mingyan Wu, Vincent Battaglia, Julian E.C. Sabisch, Xiangyun Song, and Gao Liu
- Subjects
Ions ,Silicon ,Materials science ,Surface Properties ,Mechanical Engineering ,Nanoparticle ,chemistry.chemical_element ,Bioengineering ,Nanotechnology ,General Chemistry ,Lithium ,Condensed Matter Physics ,Electrochemistry ,Lithium-ion battery ,Anode ,Electric Power Supplies ,chemistry ,Chemical engineering ,Electrode ,Nanoparticles ,General Materials Science ,Electrical conductor ,Electrodes ,Faraday efficiency - Abstract
To address the significant challenges associated with large volume change of micrometer-sized Si particles as high-capacity anode materials for lithium-ion batteries, we demonstrated a simple but effective strategy: using Si nanoparticles as a structural and conductive additive, with micrometer-sized Si as the main lithium-ion storage material. The Si nanoparticles connected into the network structure in situ during the charge process, to provide electronic connectivity and structure stability for the electrode. The resulting electrode showed a high specific capacity of 2500 mAh/g after 30 cycles with high initial Coulombic efficiency (73%) and good rate performance during electrochemical lithiation and delithiation: between 0.01 and 1 V vs Li/Li(+).
- Published
- 2013