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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Применить Всего найдено 6. Отображено 6.
06-06-2023 дата публикации

Preparation method and application of conductive dual-catalyst loaded nitrogen-doped hollow carbon/sulfur composite material

Номер: CN116230941A
Автор: HUANG XIAOXIAO, LIU YANAN, QIN GUANGYU, WANG XIAOSHUANG, SONG MEIXIU
Принадлежит:

The invention discloses a preparation method and application of a conductive dual-catalyst loaded nitrogen-doped hollow carbon/sulfur composite material, and relates to the field of preparation methods and application of conductive dual-catalyst loaded nitrogen-doped hollow carbon-based composite materials. The invention aims to solve the technical problems of low utilization rate of an electrode active substance and rapid attenuation of the cycle capacity of a battery caused by effective inhibition of shuttling of lithium polysulfide in an existing sulfur positive electrode material prepared by taking a metal compound/porous carbon material as a carrier material. The method comprises the following steps: firstly, preparing a bimetallic ion chelated organic phosphorus loaded hollow precursor material; and preparing the double-metal phosphide loaded nitrogen-doped hollow carbon composite material with abundant gaps through one-step thermal reduction treatment, and loading sulfur. The composite ...

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Номер записи: 1
06-06-2023 дата публикации

Preparation method of graphene-loaded nitrogen-doped carbon nanocage-coated cobalt phosphide wave-absorbing material

Номер: CN116234281A
Автор: HUANG XIAOXIAO, QIN GUANGYU, LIU YANAN
Принадлежит:

The invention discloses a preparation method of a graphene-loaded nitrogen-doped carbon nanocage-coated cobalt phosphide wave-absorbing material, and relates to the field of preparation of composite materials for electromagnetic wave radiation absorption and protection. The invention aims to solve the technical problems of poor impedance matching performance, narrow wave-absorbing frequency band and weaker absorption performance when the existing graphene material is independently used. The method comprises the following steps: synthesizing an MOF precursor; preparing an MOF (Metal Organic Framework) derived nitrogen-doped carbon-coated cobalt phosphide nanoparticle composite material; and compounding the material with reduced graphene oxide to prepare the graphene-loaded nitrogen-doped carbon nanocage coated cobalt phosphide composite material. The product provided by the invention has excellent wave-absorbing performance, and has the performance of strong absorption and wide effective ...

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Номер записи: 2
23-06-2023 дата публикации

Preparation method and application of silicon dioxide-based conductive composite material grafted with nitrogen atoms on surface

Номер: CN116285888A
Автор: ZHONG BO, HE YUNFEI, LIU DONGDONG, HUANG XIAOXIAO, XIA LONG, SU QIANG, LI XINYU, FU WENBO
Принадлежит:

The invention discloses a preparation method and application of a silicon dioxide-based conductive composite material grafted with nitrogen atoms on the surface, and belongs to the technical field of wave-absorbing materials. The invention aims to solve the problem that the traditional insulator material silicon dioxide has no electromagnetic wave absorption capability. The method comprises the following steps: 1, uniformly mixing hydrazine monohydrochloride, tetraethoxysilane and N, N-dimethylformamide, heating, and naturally cooling to obtain a gel solid B; and 2, dissolving the gel-like solid B in absolute ethyl alcohol, centrifuging and drying to obtain the silicon dioxide-based conductive composite material with the surface grafted with nitrogen atoms. The material is prepared in a one-step solvothermal mode, the process is simple, the cost is low, and the process is green and pollution-free; the silicon dioxide insulating material is subjected to simple N doping to realize the conversion ...

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Номер записи: 3
07-07-2023 дата публикации

Design method and application of multi-component electromagnetic wave absorbing material based on machine learning reverse design

Номер: CN116403666A
Автор: HUANG XIAOXIAO, LIU YUHAO, LIU YANAN, ZHOU YU
Принадлежит:

The invention discloses a design method and application of a multi-component electromagnetic wave absorbing material based on machine learning reverse design, and aims to solve the problem that intrinsic electromagnetic parameters of a coating cannot be obtained at present, and a design method which is rapid and effective in design for different microwave absorbing targets is obtained. According to the method, the multi-component composite wave-absorbing material meeting different targets is prepared by obtaining the intrinsic electromagnetic parameters and combining the genetic algorithm in machine learning with the guidance of Maxwell Garnett and transmission line principle calculation. The innovation of the prepared multi-component composite wave-absorbing material is that intrinsic electromagnetic parameters of a coating material are obtained, the formula of the material is optimized under the guidance of an algorithm, and the electromagnetic characteristics of the material are fully ...

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Номер записи: 4
28-07-2023 дата публикации

Preparation method of molybdenum disulfide/molybdenum phosphide heterojunction (at) rGO/sulfur composite material applied to positive electrode of lithium-sulfur battery and battery

Номер: CN116504944A
Автор: HUANG XIAOXIAO, SONG MEIXIU, LIU YANAN, MA GUANSHENG
Принадлежит:

The invention discloses a preparation method of a molybdenum disulfide/molybdenum phosphide heterojunction (at) rGO/sulfur composite material applied to a positive electrode of a lithium-sulfur battery and the battery, and relates to the field of a preparation method and application of a MoS2/MoP heterojunction (at) rGO. The invention aims to solve the technical problems of battery capacity fading caused by shuttle effect of long-chain lithium polysulfide, low intrinsic conductivity of MoS2 and less exposure of active sites. The method comprises the following steps: preparing a GO dispersion liquid; then preparing a MoS2 (at) rGO composite material; then, a MoS2/MoP heterojunction (at) rGO is prepared through phosphorization; and finally, carrying out sulfur loading to prepare the MoS2/MoP heterojunction (at) rGO/sulfur composite material. The MoS2/MoP heterojunction (at) rGO is used as the S carrier, the cost is low, the process is simple, large-scale production is expected to be realized ...

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Номер записи: 5
21-07-2023 дата публикации

Preparation method and application of high-loading-capacity metal atom coordinated nitrogen and oxygen loaded hollow carbon/sulfur composite material

Номер: CN116470050A
Автор: HUANG XIAOXIAO, LIU YANAN, QIN GUANGYU, LIANG HONGBO, HONG JINGZHE
Принадлежит:

The invention discloses a preparation method and application of a high-load metal atom coordinated nitrogen and oxygen loaded hollow carbon/sulfur composite material, and relates to the field of preparation methods of high-load metal atom coordinated nitrogen and oxygen loaded hollow carbon/sulfur composite materials. The invention aims to solve the technical problem of insufficient catalytic sites caused by low metal atom utilization rate, low metal monatomic loading capacity and the like in the prior art. The method comprises the following steps: firstly, preparing an oxygen-loaded hollow carbon material with metal monatomic coordination; and preparing the high-loading metal atom coordinated nitrogen and oxygen loaded hollow carbon/sulfur composite material by combining one-step impregnation and double adsorption with one-step high-temperature heat treatment, and loading sulfur. The composite material is applied to a lithium-sulfur battery as an S positive electrode. The method is low ...

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Номер записи: 6