A-few-second synthesis of silicon nanoparticles by gas-evaporation and their self-supporting electrodes based on carbon nanotube matrix for lithium secondary battery anodes

Takayuki Kowase, Keisuke Hori, Kei Hasegawa, Toshiyuki Momma, Suguru Noda

    Research output: Contribution to journalArticle

    3 Citations (Scopus)

    Abstract

    Rapid gas-evaporation method is proposed and developed, which yields Si nanoparticles (SiNPs) in a few seconds at high yields of 20%–60% from inexpensive and safe bulk Si. Such rapid process is realized by heating the Si source to a temperature ≥2000 °C, much higher than the melting point of Si (1414 °C). The size of SiNPs is controlled at tens to hundreds nanometers simply by the Ar gas pressure during the evaporation process. Self-supporting films are fabricated simply by co-dispersion and filtration of the SiNPs and carbon nanotubes (CNTs) without using binders nor metal foils. The half-cell tests showed the improved performances of the SiNP-CNT composite films as anode when coated with graphitic carbon layer. Their performances are evaluated with various SiNP sizes and Si/CNT ratios systematically. The SiNP-CNT film with a Si/CNT mass ratio of 4 realizes the balanced film-based capacities of 618 mAh/gfilm, 230 mAh/cm3, and 0.644 mAh/cm2 with a moderate Si-based performance of 863 mAh/gSi at the 100th cycle.

    Original languageEnglish
    Pages (from-to)450-459
    Number of pages10
    JournalJournal of Power Sources
    Volume363
    DOIs
    Publication statusPublished - 2017 Sep 30

    Fingerprint

    storage batteries
    Carbon Nanotubes
    Secondary batteries
    lithium batteries
    Silicon
    Lithium
    Carbon nanotubes
    Anodes
    Evaporation
    anodes
    Gases
    carbon nanotubes
    evaporation
    Nanoparticles
    nanoparticles
    Electrodes
    electrodes
    silicon
    synthesis
    matrices

    Keywords

    • Carbon nanotubes
    • Composite
    • Lithium secondary batteries
    • Rapid gas-evaporation
    • Self-supporting anodes
    • Silicon nanoparticles

    ASJC Scopus subject areas

    • Renewable Energy, Sustainability and the Environment
    • Energy Engineering and Power Technology
    • Physical and Theoretical Chemistry
    • Electrical and Electronic Engineering

    Cite this

    @article{4c6c1e5bf69644748848327f901d8b9f,
    title = "A-few-second synthesis of silicon nanoparticles by gas-evaporation and their self-supporting electrodes based on carbon nanotube matrix for lithium secondary battery anodes",
    abstract = "Rapid gas-evaporation method is proposed and developed, which yields Si nanoparticles (SiNPs) in a few seconds at high yields of 20{\%}–60{\%} from inexpensive and safe bulk Si. Such rapid process is realized by heating the Si source to a temperature ≥2000 °C, much higher than the melting point of Si (1414 °C). The size of SiNPs is controlled at tens to hundreds nanometers simply by the Ar gas pressure during the evaporation process. Self-supporting films are fabricated simply by co-dispersion and filtration of the SiNPs and carbon nanotubes (CNTs) without using binders nor metal foils. The half-cell tests showed the improved performances of the SiNP-CNT composite films as anode when coated with graphitic carbon layer. Their performances are evaluated with various SiNP sizes and Si/CNT ratios systematically. The SiNP-CNT film with a Si/CNT mass ratio of 4 realizes the balanced film-based capacities of 618 mAh/gfilm, 230 mAh/cm3, and 0.644 mAh/cm2 with a moderate Si-based performance of 863 mAh/gSi at the 100th cycle.",
    keywords = "Carbon nanotubes, Composite, Lithium secondary batteries, Rapid gas-evaporation, Self-supporting anodes, Silicon nanoparticles",
    author = "Takayuki Kowase and Keisuke Hori and Kei Hasegawa and Toshiyuki Momma and Suguru Noda",
    year = "2017",
    month = "9",
    day = "30",
    doi = "10.1016/j.jpowsour.2017.07.115",
    language = "English",
    volume = "363",
    pages = "450--459",
    journal = "Journal of Power Sources",
    issn = "0378-7753",
    publisher = "Elsevier",

    }

    TY - JOUR

    T1 - A-few-second synthesis of silicon nanoparticles by gas-evaporation and their self-supporting electrodes based on carbon nanotube matrix for lithium secondary battery anodes

    AU - Kowase, Takayuki

    AU - Hori, Keisuke

    AU - Hasegawa, Kei

    AU - Momma, Toshiyuki

    AU - Noda, Suguru

    PY - 2017/9/30

    Y1 - 2017/9/30

    N2 - Rapid gas-evaporation method is proposed and developed, which yields Si nanoparticles (SiNPs) in a few seconds at high yields of 20%–60% from inexpensive and safe bulk Si. Such rapid process is realized by heating the Si source to a temperature ≥2000 °C, much higher than the melting point of Si (1414 °C). The size of SiNPs is controlled at tens to hundreds nanometers simply by the Ar gas pressure during the evaporation process. Self-supporting films are fabricated simply by co-dispersion and filtration of the SiNPs and carbon nanotubes (CNTs) without using binders nor metal foils. The half-cell tests showed the improved performances of the SiNP-CNT composite films as anode when coated with graphitic carbon layer. Their performances are evaluated with various SiNP sizes and Si/CNT ratios systematically. The SiNP-CNT film with a Si/CNT mass ratio of 4 realizes the balanced film-based capacities of 618 mAh/gfilm, 230 mAh/cm3, and 0.644 mAh/cm2 with a moderate Si-based performance of 863 mAh/gSi at the 100th cycle.

    AB - Rapid gas-evaporation method is proposed and developed, which yields Si nanoparticles (SiNPs) in a few seconds at high yields of 20%–60% from inexpensive and safe bulk Si. Such rapid process is realized by heating the Si source to a temperature ≥2000 °C, much higher than the melting point of Si (1414 °C). The size of SiNPs is controlled at tens to hundreds nanometers simply by the Ar gas pressure during the evaporation process. Self-supporting films are fabricated simply by co-dispersion and filtration of the SiNPs and carbon nanotubes (CNTs) without using binders nor metal foils. The half-cell tests showed the improved performances of the SiNP-CNT composite films as anode when coated with graphitic carbon layer. Their performances are evaluated with various SiNP sizes and Si/CNT ratios systematically. The SiNP-CNT film with a Si/CNT mass ratio of 4 realizes the balanced film-based capacities of 618 mAh/gfilm, 230 mAh/cm3, and 0.644 mAh/cm2 with a moderate Si-based performance of 863 mAh/gSi at the 100th cycle.

    KW - Carbon nanotubes

    KW - Composite

    KW - Lithium secondary batteries

    KW - Rapid gas-evaporation

    KW - Self-supporting anodes

    KW - Silicon nanoparticles

    UR - http://www.scopus.com/inward/record.url?scp=85026730721&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=85026730721&partnerID=8YFLogxK

    U2 - 10.1016/j.jpowsour.2017.07.115

    DO - 10.1016/j.jpowsour.2017.07.115

    M3 - Article

    AN - SCOPUS:85026730721

    VL - 363

    SP - 450

    EP - 459

    JO - Journal of Power Sources

    JF - Journal of Power Sources

    SN - 0378-7753

    ER -