China University of Petroleum

Qingdao University

Hui Du

Jun Li

Dong Liu

Zhihao Li

Zhaojun Chen

Xin Gong

Bin Lou

Jianguo Zhang

Changlong Yin

Xiujie Yang

Fushan Wen

Nan Shi

Zhiqing Ma

Chong Jiao

Yonggang Cao

Hui Fu

Luning Chai

Jinzhe Fu

Yajing Duan

Zhichen Zhang

Enqiang Yu

Yu'e Fu

Huizhi Yuan

A molybdenum disulfide/graphene/carbon composite material having a hierarchical pore structure includes a composite nanofiber having a diameter of 60 to 500 nm. The composite nanofiber comprises, in mass percentage, 3% to 35% of molybdenum disulfide, 0.2% to 10% of graphene, and 60% to 95% of carbon. The composite nanofiber has a hierarchical pore structure distributed along the axial direction, and has a pore diameter continuously distributed between 0.1 nm and 5 μm and an average pore diameter between 1.5 nm and 25 nm. On the basis of the pore volume, in the hierarchical pore structure, a micropore structure accounts for 25% to 60%, and a mesoporous structure accounts for 40% to 75%. The microporous structure is distributed on the surface of the nanofiber and the pore wall of the mesoporous structure.

Molybdenum disulfide/graphene/carbon composite material and use thereof

A method for preparing needle coke for ultra-high power (UHP) electrodes from heavy oil is provided. In this method, heavy oil is used as a raw material. The size exclusion chromatography (SEC) is conducted with polystyrene (PS) as a packing material to separate out specific components with a relative molecular weight of 400 to 1,000. The ion-exchange chromatography (IEC) is conducted to remove acidic and alkaline components to obtain a neutral raw material. The neutral raw material is subjected to two-stage consecutive carbonization to obtain green coke, and the green coke is subjected to high-temperature calcination to obtain the needle coke for UHP electrodes. The needle coke has a true density of more than 2.13 g/cmand a coefficient of thermal expansion (CTE) of &#x2264;1.15&#xd7;10/&#xb0; C. at 25&#xb0; C. to 600&#xb0; C.

Method for preparing needle coke for ultra-high power (UHP) electrodes from heavy oil

Preparation methods of a high modulus carbon fiber (HMCF) and a precursor (mesophase pitch (MP)) thereof are provided. The preparation method of MP includes: separating components with a molecular weight distribution (MWD) of 400 to 1,000 from a heavy oil raw material through size-exclusion chromatography (SEC); subjecting the components to ion-exchange chromatography (IEC) to obtain modified feedstock oil, where, the components are passed through macroporous cation-exchange and anion-exchange resins in sequence to remove acidic and alkaline components; and subjecting the modified feedstock oil to thermal polycondensation and carbonization to obtain high-quality MP with prominent spinnability. With high mesophase content, low softening point, low viscosity, and prominent meltability and spinnability, the obtained MP is a high-quality raw material for preparing HMCFs. The obtained MP can be subjected to melt spinning, pre-oxidation, carbonization, and graphitization to obtain an MP-based HMCF.

Preparation methods of high modulus carbon fiber (HMCF) and precursor (mesophase pitch (MP)) thereof

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Hui Du