Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Nanometer silicon tin powder of lithium ion secondary battery negative electrode material and preparation method of nanometer silicon tin powder
The invention discloses nanometer silicon tin powder of a lithium ion secondary battery negative electrode material and a preparation method of the nanometer silicon tin powder. The nanometer silicon tin powder comprises, by mass, 5%-50% of tin and 50%-95% of silicon. The tin is distributed in two states: one part of the tin is dispersed in the nano silicon-tin powder particles, and the other part of the tin is distributed on the surfaces of the nano silicon-tin powder particles to form a coating layer; the silicon tin powder particles are spherical, and the specific surface area of the sphere is 30-200 m < 2 >/g. The preparation method comprises the following steps: uniformly mixing pure silicon powder and pure tin powder with the particle size of 0.1-25 [mu] m in proportion; adding the silicon-tin raw material powder into a plasma arc, and heating the silicon-tin raw material powder to an evaporation temperature when the silicon-tin raw material powder passes through the high-temperature plasma arc to form mixed steam of silicon and tin; and entering a low-temperature area, and cooling steam of silicon and tin to form nano silicon-tin powder. The nano silicon tin powder can improve the conductivity of the powder, and does not crack when bearing large stress in the silicon expansion and shrinkage process.
本发明公开了一种锂离子二次电池负极材料的纳米硅锡粉及其制备方法，其中锡的质量百分比为5％‑50％，硅的质量百分比为50％‑95％；所述的锡呈两种状态分布：一部分锡分散在纳米硅锡粉颗粒中，另一部分锡分布在纳米硅锡粉颗粒的表面而形成包覆层；所述硅锡粉颗粒的形状为球形，所述球形的比表面积为30‑200m2/g。将颗粒尺寸为0.1—25μm的纯硅粉和纯锡粉按比例混合均匀；将以上的硅锡原料粉加入到等离子体弧中，硅锡原料粉经过高温等离子弧时被加热至蒸发温度，形成硅和锡的混合蒸汽；再进入到低温区，硅和锡的蒸汽冷却下来形成纳米硅锡粉。本纳米硅锡粉能够提高粉体的导电性能且在硅膨胀和收缩过程中承受较大的应力而不破裂。
Nanometer silicon tin powder of lithium ion secondary battery negative electrode material and preparation method of nanometer silicon tin powder
The invention discloses nanometer silicon tin powder of a lithium ion secondary battery negative electrode material and a preparation method of the nanometer silicon tin powder. The nanometer silicon tin powder comprises, by mass, 5%-50% of tin and 50%-95% of silicon. The tin is distributed in two states: one part of the tin is dispersed in the nano silicon-tin powder particles, and the other part of the tin is distributed on the surfaces of the nano silicon-tin powder particles to form a coating layer; the silicon tin powder particles are spherical, and the specific surface area of the sphere is 30-200 m < 2 >/g. The preparation method comprises the following steps: uniformly mixing pure silicon powder and pure tin powder with the particle size of 0.1-25 [mu] m in proportion; adding the silicon-tin raw material powder into a plasma arc, and heating the silicon-tin raw material powder to an evaporation temperature when the silicon-tin raw material powder passes through the high-temperature plasma arc to form mixed steam of silicon and tin; and entering a low-temperature area, and cooling steam of silicon and tin to form nano silicon-tin powder. The nano silicon tin powder can improve the conductivity of the powder, and does not crack when bearing large stress in the silicon expansion and shrinkage process.
本发明公开了一种锂离子二次电池负极材料的纳米硅锡粉及其制备方法，其中锡的质量百分比为5％‑50％，硅的质量百分比为50％‑95％；所述的锡呈两种状态分布：一部分锡分散在纳米硅锡粉颗粒中，另一部分锡分布在纳米硅锡粉颗粒的表面而形成包覆层；所述硅锡粉颗粒的形状为球形，所述球形的比表面积为30‑200m2/g。将颗粒尺寸为0.1—25μm的纯硅粉和纯锡粉按比例混合均匀；将以上的硅锡原料粉加入到等离子体弧中，硅锡原料粉经过高温等离子弧时被加热至蒸发温度，形成硅和锡的混合蒸汽；再进入到低温区，硅和锡的蒸汽冷却下来形成纳米硅锡粉。本纳米硅锡粉能够提高粉体的导电性能且在硅膨胀和收缩过程中承受较大的应力而不破裂。
Nanometer silicon tin powder of lithium ion secondary battery negative electrode material and preparation method of nanometer silicon tin powder
一种锂离子二次电池负极材料的纳米硅锡粉及其制备方法
GAO SHUJUAN (Autor:in) / WANG JIALEI (Autor:in) / MA LIBO (Autor:in) / SONG CAIGEN (Autor:in) / ZHAO DENGYONG (Autor:in) / CHEN GANGQIANG (Autor:in)
01.10.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
H01M
Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie
,
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
/
B82Y
Bestimmter Gebrauch oder bestimmte Anwendung von Nanostrukturen
,
SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES
/
C04B
Kalk
,
LIME
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