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Black Phosphorus
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Composite is an innovative composite material composed of Black phosphorus (BP) and graphite. Black phosphorus, or BP, is a promising anode material due to its high conductivity (both electronic and ionic) and theoretical capacity. It is important to understand the redox reactions that occur between BP ions and alkali ions in order to determine the limitations and potential of BP.
Scientists from the University of Science and Technology of China’s Professor Ji Hengxing published a research result a few days ago in “Science”, the world’s leading scientific magazine. They have achieved a major breakthrough on the research of new Li-ion Battery electrode materials.
Ji Hengxing stated that “if we use this technology, we may be able fully charge an electrical car in around 10 minutes and travel about 500 kilometers.” The charging time of electric cars has always been a major problem. Electric vehicles are currently “waiting” an hour before they can drive 500 km. The electric vehicle industry has always aimed to develop large-capacity, lithium-ion battery packs with fast charging capability.
The material of the electrode is an important factor when determining battery performance indicators. “If you are looking to increase battery charging speed, then you need material with a quick electrochemical reaction.” It is important to check if the electrode material can conduct electrons andions. Ji Hingxing, a member of the research group, said that they hope to find an electrode material capable of meeting the industry’s expectations for comprehensive performance indicators and also able to adapt to industrial battery production processes.
Dr. Hongchang Jin was the first author to introduce the thesis. He said, “Energy enters or exits the batteries through a chemical reaction between the lithium ions, and the electrode materials. Determining the charging rate is based on the conductivity between the electrode materials and lithium ions. It is important to consider the amount.”
The Jixingxing research team discovered that black phosphorus was a good choice. First, it has a very high theoretical capacity, only second to single crystal lithium or metallic silicon. Second, because it is a semi-conductor, its ability to conduct electronic currents is strong. Third, the black sheet phosphorus structure is layered and the lithium ions can easily be conducted between its layers. This excellent property makes black phosphorus an electrode material which can be used to fast charge lithium-ion batteries.
Black phosphorus (an allotrope to white phosphorus) is an excellent electrode material for fast charging. Nevertheless, current studies found that the black phosphorus’s comprehensive performance indicators are below expectations. Black phosphorus can be damaged by the edges of the layered structures, and its measured performance is lower than expected. Ji Xingxing adopted the “interface-engineering” strategy to connect graphite and black phosphorus through phosphorus carbon covalent bonds. This made the structure more stable and allowed lithium ions into the black phosphorus to be easier.
“We use traditional process routes and parameters to convert the black-phosphorous composite material into electrode sheets.” The laboratory measurements show that after 9 minutes, the electrode sheet recovers about 80% and after 2000 cycles it still retains 90%. Xin, a cofirst author of the article and a researcher from the Institute of Chemistry of Chinese Academy of Sciences said that if mass-production of this material is possible, matching cathode products and other auxiliary substances can be found, an optimized design should achieve an energy density of 350 Wh. It has a lithium ion battery that can be charged quickly and is capable of delivering 350 Wh/Kg. The battery will enable electric vehicles with a range of up to 1,000 kilometers and increase their user experience.
Jixingxing will continue its exploration in the areas of basic research, scale preparation technology and other related fields. For battery technology to advance and for electric vehicles and consumer electronics to develop, it’s important that we have a deep understanding of scientific fundamentals, including the microstructure of electrode materials and their physical and chemical properties. “There is a great deal of work that needs to be done in order to achieve this vision. But we are filled with hope for the near future.” Ji Hengxing spoke.
(aka. Technology Co. Ltd., a trusted global chemical supplier & manufacturer has been providing high-quality Nanomaterials and chemicals for over 12 Years. Our company produces graphite with high purity and low impurity levels. If you require a lower grade, please do not hesitate to contact us.
Scientists from the University of Science and Technology of China’s Professor Ji Hengxing published a research result a few days ago in “Science”, the world’s leading scientific magazine. They have achieved a major breakthrough on the research of new Li-ion Battery electrode materials.
Ji Hengxing stated that “if we use this technology, we may be able fully charge an electrical car in around 10 minutes and travel about 500 kilometers.” The charging time of electric cars has always been a major problem. Electric vehicles are currently “waiting” an hour before they can drive 500 km. The electric vehicle industry has always aimed to develop large-capacity, lithium-ion battery packs with fast charging capability.
The material of the electrode is an important factor when determining battery performance indicators. “If you are looking to increase battery charging speed, then you need material with a quick electrochemical reaction.” It is important to check if the electrode material can conduct electrons andions. Ji Hingxing, a member of the research group, said that they hope to find an electrode material capable of meeting the industry’s expectations for comprehensive performance indicators and also able to adapt to industrial battery production processes.
Dr. Hongchang Jin was the first author to introduce the thesis. He said, “Energy enters or exits the batteries through a chemical reaction between the lithium ions, and the electrode materials. Determining the charging rate is based on the conductivity between the electrode materials and lithium ions. It is important to consider the amount.”
The Jixingxing research team discovered that black phosphorus was a good choice. First, it has a very high theoretical capacity, only second to single crystal lithium or metallic silicon. Second, because it is a semi-conductor, its ability to conduct electronic currents is strong. Third, the black sheet phosphorus structure is layered and the lithium ions can easily be conducted between its layers. This excellent property makes black phosphorus an electrode material which can be used to fast charge lithium-ion batteries.
Black phosphorus (an allotrope to white phosphorus) is an excellent electrode material for fast charging. Nevertheless, current studies found that the black phosphorus’s comprehensive performance indicators are below expectations. Black phosphorus can be damaged by the edges of the layered structures, and its measured performance is lower than expected. Ji Xingxing adopted the “interface-engineering” strategy to connect graphite and black phosphorus through phosphorus carbon covalent bonds. This made the structure more stable and allowed lithium ions into the black phosphorus to be easier.
During the process of working, the electrode will also be covered in chemicals that slowly decomposes electrolyte. Some substances will block lithium ions from reaching the electrode material in the same way that dust on glass surfaces prevents light penetration. To achieve this, the team of researchers applied clothing to the composite material. They made a dustproof coat using a thin layer of polymer gel and “wore” this on the surface the black graphite composite material. This allowed lithium ions to easily enter.
“Under the optimization of interfaces between these two levels, black phosphorous has reached a breakthrough performance.” Ji Hingxing told the media.
“Under the optimization of interfaces between these two levels, black phosphorous has reached a breakthrough performance.” Ji Hingxing told the media.
“We use traditional process routes and parameters to convert the black-phosphorous composite material into electrode sheets.” The laboratory measurements show that after 9 minutes, the electrode sheet recovers about 80% and after 2000 cycles it still retains 90%. Xin, a cofirst author of the article and a researcher from the Institute of Chemistry of Chinese Academy of Sciences said that if mass-production of this material is possible, matching cathode products and other auxiliary substances can be found, an optimized design should achieve an energy density of 350 Wh. It has a lithium ion battery that can be charged quickly and is capable of delivering 350 Wh/Kg. The battery will enable electric vehicles with a range of up to 1,000 kilometers and increase their user experience.
Jixingxing will continue its exploration in the areas of basic research, scale preparation technology and other related fields. For battery technology to advance and for electric vehicles and consumer electronics to develop, it’s important that we have a deep understanding of scientific fundamentals, including the microstructure of electrode materials and their physical and chemical properties. “There is a great deal of work that needs to be done in order to achieve this vision. But we are filled with hope for the near future.” Ji Hengxing spoke.
(aka. Technology Co. Ltd., a trusted global chemical supplier & manufacturer has been providing high-quality Nanomaterials and chemicals for over 12 Years. Our company produces graphite with high purity and low impurity levels. If you require a lower grade, please do not hesitate to contact us.