Battery materials. Artificial graphite anode materials. Artificial graphite anode materials . Artificial graphite is a highly durable material, and is used in a wide range of applications, including PC and smartphone devices, and lithium-ion …
Since 2017, the availability of needle coke and graphite electrodes has been under pressure due to substantial financially- and environmentally-driven capacity closures, particularly in China. As a result, prices for both materials have risen sharply and are expected to remain structurally high, at least in the medium term.
In this study, needle coke and pitch are used to characterize the reassembled particles of a negative electrode material of a lithium secondary battery, depending on the size of the filler. Figure 1 shows a schematic diagram of the experimental process. Flowchart of the process of the blocked anode materials
In this paper, an artificial graphite anode material (particle size: 10–15 μm) was manufactured from coke (10–15 μm) or from a composite material using coke 2–5 μm in size and the electrochemical properties of the manufactured material are measured and subjected to a comparison.
When a block is manufactured using coke at a particle size of 2–5 μm and an anode material is created with a particle size of 10–15 μm, voids capable of storing lithium ions between the coke particles form inside the anode material. These spaces are utilized and the capacity was measured.
A commercial type of needle coke (PMC Tech Co., Korea) was used as the filler, and pitch manufactured from a petroleum-based raw material was used as the binder to manufacturing the block used here. The physical characteristics of the needle-shaped coke and the pitch are shown in Tables 1 and 2, respectively.
Lithium foil was used as the counter electrode in the coin-type cells for the electrochemical test. The electrolyte was a 1 M LiPF 6 solution in a mixture of ethylene carbonate (EC) and diethyl carbonate (DEC) (1:1 vol.%. Wellcos Co., Republic of Korea) for electrochemical analysis at room temperature.
Battery materials. Artificial graphite anode materials. Artificial graphite anode materials . Artificial graphite is a highly durable material, and is used in a wide range of applications, including PC and smartphone devices, and lithium-ion …
Needle coke is widely used as precursor of some carbon material, such as graphite electrodes or negative material for lithium-ion battery of new energy vehicle. Coal tar pitch (CTP)...
Artificial graphite negative electrode material is a material with a certain particle size distribution obtained by crushing and granulating raw materials such as needle coke, petroleum coke, and pitch coke, and then undergoes high-temperature graphitization treatment to form a graphite sheet structure. During production, artificial ...
Needle coke (1900 °C) and metallurgical coke (1900 °C) in particular give a capacity of over 200 mAh/g and a cyclic efficiency of nearly 100%, whereas poor performance is exhibited by those...
Needle coke is attracting attention as an anode material for lithium-ion batteries due to its high reaction rates, but its low specific capacity still remains a problem to be solved. In this study, we attempted to improve the discharge capacity of needle coke-based anodes by introducing oxygen into the needle coke with ozone treatments. To ...
Artificial graphite negative electrode material is a material with a certain particle size distribution obtained by crushing and granulating raw materials such as needle coke, petroleum coke, and pitch coke, and then …
In this work, we have utilized needle cokes, an commercial carbon material with high carbon content and soft carbon structure, as a single carbon source for anode material. A lithium-ion...
Here, APCs materials are directly synthesized by a high temperature shock (HTS) strategy using needle coke as a precursor. The structure of as-prepared APC is characterized by XRD, SEM and Raman, and electrochemical tests confirmed its good electrochemical performance. In the two-electrode system, the supercapacitor with HTS-APC …
In this study, needle coke and pitch are used to characterize the reassembled particles of a negative electrode material of a lithium secondary battery, depending on the size …
Needle coke (1900 °C) and metallurgical coke (1900 °C) in particular give a capacity of over 200 mAh/g and a cyclic efficiency of nearly 100%, whereas poor performance is exhibited by those...
Needle coke, the remaining material after refining petroleum, is used as an anode of a lithium-ion secondary battery. Sulfur is separated from the needle coke to below 0.1wt.% using the molten ...
Notably, in comparison with oil-based needle coke, coal-derived needle coke has much less impurities and stronger capability of puffing inhibition, which are actually more desirable for the fabrication of electrode materials. Moreover, with the fast development of coal and petroleum industry, the quality of needle coke products has made steady progress over …
In this work, we used NF 3 plasma treatments of needle cokes to make superior anode materials with high rates, high stabilities, and competitive discharge capacities. The chemical, structural, and morphological characteristics of the NF 3 plasma-treated needle …
Liu Chunfa and others studied the influence of calcination temperature on the electrochemical properties of anode materials for needle petroleum coke to the lithium-ion battery by analyzing the cycle performance, charge-discharge characteristics, and cyclic voltammetry curves. In the range of 700-1000 ℃, the higher the temperature, the smaller the graphite layer spacing of …
The invention discloses a preparation method of a battery cathode material based on needle coke green coke and calcined coke, which comprises the steps of crushing to obtain needle...
Needle coke is widely used as precursor of some carbon material, such as graphite electrodes or negative material for lithium-ion battery of new energy vehicle. Coal tar …
This study investigated the effect of changes in crystallinity on electrochemical properties by graphitizing needle coke and regular coke. Coke with different orientations showed excellent crystallinity in needle coke with an axial orientation. When needle coke was graphitized, its original orientation affected the rearrangement of ...
Needle coke was recognized as one of the most important precursor to produce ultra-high power graphite electrode, commercial anode materials for lithium-ion battery, and special graphite materials. It was generally accepted that the microstructure of needle coke has been acted as a key role on the quality of its derived graphite materials. In ...
In this paper, to investigate the effect of coke orientation on the crystallization properties and electrochemical performance of graphite, needle coke and regular coke with different crystallinities and orientation characteristics were selected as raw materials. To examine the effect of crystal properties on the particle shape in regard to possible raw materials, a …
Here, APCs materials are directly synthesized by a high temperature shock (HTS) strategy using needle coke as a precursor. The structure of as-prepared APC is characterized by XRD, SEM and Raman, and electrochemical tests confirmed its good electrochemical performance.
In this work, we have utilized needle cokes, an commercial carbon material with high carbon content and soft carbon structure, as a single carbon source for anode material. A …
In this work, we used NF 3 plasma treatments of needle cokes to make superior anode materials with high rates, high stabilities, and competitive discharge capacities. The chemical, structural, and morphological characteristics of the NF 3 plasma-treated needle cokes were evaluated to define the effects of the NF 3 plasma treatment.
Artificial graphite negative electrode material is a material with a certain particle size distribution obtained by crushing and granulating raw materials such as needle coke, petroleum coke, and pitch coke, and then undergoes high-temperature graphitization treatment to form a graphite sheet structure. During production, artificial graphite ...
Here, APCs materials are directly synthesized by a high temperature shock (HTS) strategy using needle coke as a precursor. The structure of as-prepared APC is …
NF 3 plasma treatments were used to improve the electrochemical properties of needle coke-based lithium-ion battery (LIB) anode materials. The effects of the NF 3 plasma treatments on the chemical, structural, and morphological properties of the needle cokes were evaluated with various analyses, and simultaneous heteroatom doping coupled with surface …
In this study, needle coke and pitch are used to characterize the reassembled particles of a negative electrode material of a lithium secondary battery, depending on the size of the filler. Figure 1 shows a schematic diagram of the experimental process.
Abstract The possibility of using carbon materials based on petroleum coke as the cheap and available active material for negative electrodes of lithium–sulfur rechargeable batteries is considered. The comparative studies of characteristics of lithium–sulfur cells with negative electrodes based on metal lithium, graphite, and petroleum coke are carried out. It is …
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