Black Phosphorus graphite composite, a brand new composite material is made with black phosphorus and graphite. Due to its electronic/ionic conductivity high and theoretical potential, Black phosphorus is a popular anode for storage of alkali metallic ions. It is essential to understand how BP reacts with alkali metal ions in order to discover the limitations and potential of BP. This knowledge will help guide the development of BP-based batteries for alkali metal-ion high-performance.
Recently, Professor Ji Hengxing’s team from the University of Science and Technology of China released a research paper in Science. It revealed that they have developed a novel black phosphorus compound material. This new composite material can be used to create a high-capacity lithium-ion cell with long-lasting, high-charging, and low-maintenance.
Ji Hengxing said that, if the technology was used properly, it could be possible to completely charge an electric vehicle in just 10 minutes. This would allow you to drive approximately 500km. The problem with electric cars has been their slow charging. Even the best-selling electric vehicles can only be driven for 500km if they are fully charged. It has been a key goal for the electric car industry to create large-capacity lithium ion batteries that can be charged quickly.
Battery performance indicators are influenced by the electrode material. A material capable of fast electrochemical reactions is essential to speed up battery charging. An important criterion is the conductivity of electrons or ions. Ji Hingxing explained that they are looking to find an electrode material that not only meets industry requirements in terms performance indicators, but can also be used to adapt to industrial batteries production processes.
Dr. Hongchang Jin was the first to present the thesis. He stated: “Energy enters into and leaves the battery through chemical reactions between lithium ions, electrode materials. To determine the charging speed, conductivity is key. Also, the amount of lithium ions in the electrode material can also be a factor. Also important is the quantity.
Jixingxing’s team discovered that black phosphorus makes a good choice. The theoretical power of black phosphorus is second only to single-crystalline silicon and metallic lithium. As a semiconductor, it is strong at conducting electrons. The third property of blackphosphorus is its layered structure. Lithium ions can quickly be conducted through the layers between black phosphorus sheets. Black phosphorus is a promising electrode material because it can fast-charge lithium-ion batteries.
A black phosphorus allotrope is white phosphorus. It is an excellent electrode material that can meet fast charging requirements. Recent studies show that the black phosphorus comprehensive performance indicators do not match expectations. Because black phosphorus can cause structural damage at the edges of its layered structure, the actual performance has been far below what was expected. Ji Xingxing team chose the “interface Engineering” strategy. They used graphite and black phosphorus to create a more stable structure. The process of Lithium ions entering black phosphorus particles through phosphorus carbon covalent bonds is much easier.
Additionally, chemicals will be used to wrap the electrode material in chemicals. These chemicals slowly dissolve the electrolyte as it is being worked on. Certain substances may prevent lithiumions from reaching the electrode material. For this reason, researchers placed a layer of clothing over the composite material. The researchers used a thin layer of polymer gel to create a dustproof coating and then “worn” the material on the black phosphorous graphite to permit lithium ions to flow smoothly.
The interface optimization between these two levels has enabled this composite black phosphorous material to achieve a breakthrough in its performance. Ji Hingxing spoke.
To make the electrode sheet of black phosphorous, we use traditional process paths and technical parameters. According to laboratory measurement, the electrode sheet has a capacity of 90% and can be charged for about 80% after nine minutes. Xin Sen, co-first authors of the paper, is a researcher from the Institute of Chemistry of Chinese Academy of Sciences. According to him, if the material can be mass produced and the matching cathode materials found, an optimized design could achieve an expected energy density of 350 Wh. The battery is lithium-ion and can be charged quickly at up to 80% of its weight. The battery can power electric vehicles for close to 1,000 km, which will make them more user-friendly.
This is the basis for Jixingxing’s continued exploration in scale preparation and basic research. It is essential to gain a deeper understanding of scientific questions such as the physical, chemical, and microstructure of electrochemical reactions and how they are reacted with each other. This will allow for breakthroughs in the field of battery technology, which can then be used to promote development of electronic devices, automobiles, and other related technologies. We are optimistic about the future, even though there’s still much to do in order to achieve our vision. Ji Hengxing spoke.
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