A kind of preparation method and application of camellia oleifera shell carbon/zinc oxide composite material
A technology of camellia husk and composite material, which is applied in the direction of final product manufacturing, sustainable manufacturing/processing, climate sustainability, etc., can solve the problems of shortening battery cycle life and drying up of electrolyte, and achieves suppression of hydrogen evolution and uniform distribution. , the effect of reducing the loss
Active Publication Date: 2021-04-09
贵州山茶产业综合开发有限公司
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Problems solved by technology
Although adding a certain carbon material can effectively slow down the irreversible sulfation of the battery, adding a carbon material with a low hydrogen evolution overpotential to the negative electrode of the lead-carbon battery will cause a severe hydrogen evolution reaction at the negative electrode during charging and discharging, resulting in the electrolyte drying up. Shortened battery cycle life
Method used
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[0036](1) In a constant temperature oil bath at 60°C, soak the Camellia oleifera husk with 5% ammonia solution by mass fraction for 24 hours (Camellia oleifera husk quality: 5% ammonia water quality = 1:150), then wash with distilled water until neutral, placing the camellia oleifera husk in a blast drying box to dry to obtain the pretreated camellia oleifera husk, putting the pretreated camellia oleifera husk into a sealed grinder for grinding, and grinding it into 200-300 mesh powder, The pretreated Camellia oleifera husk powder is obtained and sealed for preservation.
[0037] (2) the Camellia oleifera husk powder that takes 15g step (1) to obtain is placed in alumina crucible, in vacuum tube furnace, under N 2 Calcined under atmosphere, N 2 The flow rate is controlled at 100mL / min, the temperature is controlled at 600°C, the heating rate is 5°C / min, and the temperature is kept at 600°C for 2 hours. After the vacuum tube furnace is cooled to room temperature, the alumina c...
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Abstract
The invention discloses a preparation method and application of a camellia husk carbon / zinc oxide composite material. Utilize 5% ammonia solution to carry out pretreatment to camellia oleifera husk; take pretreated oleifera husk as raw material, in vacuum tube furnace, N 2 Under the atmosphere, heat at 600°C for 2 hours to obtain the camellia husk-based carbon material; respectively add the tea husk-based carbon material and citric acid absolute ethanol solution to the zinc acetate aqueous solution whose pH value is adjusted to 7, and heat at 80°C Under temperature conditions, stir for 1.5 hours, filter while hot, and obtain the camellia husk-based carbon material and Zn(OH) 2 Sol mixture; The obtained camellia husk-based carbon material and Zn(OH) 2 Sol mixture powder, in N 2 Calcination was carried out under the atmosphere, controlled at 600 °C, and kept for 2 h to obtain the camellia husk carbon / zinc oxide composite material. The camellia oleifera shell carbon / zinc oxide composite material of the invention is applied to the negative electrode material of lead-carbon batteries. The preparation process of the invention is simple, and the prepared material has high specific capacitance and high capacity retention rate.
Description
technical field [0001] The invention belongs to the technical field of negative electrode materials for lead-carbon batteries, and in particular relates to a preparation method and application of camellia oleifera shell carbon / zinc oxide composite material. Background technique [0002] As a natural tropical crop, camellia oleifera is mainly produced in South China. Guangxi is a key production area of camellia oleifera in China, with a planting history of more than 2,000 years. [0003] Camellia oleifera husk is a by-product of Camellia oleifera fruit processing camellia oil, and its weight is about 60% of the fresh weight of camellia oleifera fruit. It is a rich renewable resource for agriculture and forestry. However, Camellia oleifera husks have been almost all used as fuel for disposal or as fertilizers, with low economic benefits and low added value. Furfural, tea saponin, and activated carbon can be prepared with Camellia oleifera husks as raw materials, but with a l...
Claims
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IPC IPC(8): H01M4/36H01M4/583H01M4/62H01M4/48H01M4/42H01M10/12
CPCH01M4/362H01M4/42H01M4/48H01M4/583H01M4/625H01M10/12Y02E60/10Y02P70/50
Inventor 刘峥梁秋群艾慧婷刘欣欣刘超叶钰铭
Owner 贵州山茶产业综合开发有限公司