Germanium-coated silica composite material as well as preparation method and application thereof

• Main Authors: YAN XIN, ZHANG YUE, KANG ZHUO, ZHENG XUZHI
• Format: Patent
• Language: Chinese; English
• Published: 26.05.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; NANOTECHNOLOGY; PERFORMING OPERATIONS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; TRANSPORTING

The invention belongs to the field of lithium ion batteries, and relates to a germanium-coated silica composite material as well as a preparation method and application thereof. The preparation method of the germanium-coated silicon oxide composite material comprises the following steps: modifying silicon monoxide powder by using a polymer surfactant to obtain a surface-modified silicon monoxide dispersion liquid, dissolving germanium dioxide in an alkali solution, adjusting the pH value to 6-8, uniformly mixing with the surface-modified silicon monoxide dispersion liquid, and drying to obtain the germanium-coated silicon oxide composite material. And uniformly mixing the obtained turbid liquid with a reducing agent, performing hydrothermal reduction reaction, filtering, washing the obtained filter residue with water until the washed solution is neutral, drying, and performing high-temperature sintering in a reduction type atmosphere to obtain the germanium-coated silica composite material. The lithium ion ba