The top ten technical profiles of the 17-year lithium battery industry

Zhejiang University's new aluminum-graphene super battery: long heat and cold resistance, charging 5 seconds for 2 hours use

According to Observer's website on December 24, recently, the team of the Department of Polymer Science and Engineering of Zhejiang University has developed a new type of aluminum-graphene battery. The research results have been published in Science Advances.

This battery can work in an environment of minus 40 degrees Celsius to 120 degrees Celsius, which can be said to be both high temperature resistant and cold resistant. In a temperature of minus 30 degrees Celsius, the new battery can achieve 1000 times of charge and discharge performance without attenuation, and in the environment of 100 degrees Celsius, it can achieve 45,000 stable cycles. And the new battery is flexible, and after it has been bent 10,000 times, the capacity is completely maintained. In addition, this new type of battery does not ignite or explode even if the cell is exposed to flame.

The researchers said that the current cathode specific capacity, output voltage and surface load have a large room for improvement. The energy density is not enough to match the lithium-ion battery. In the future, it is necessary to further increase the energy density while maintaining high power density. . In addition, the current classic ionic liquid electrolytes are more expensive, and if cheaper electrolytes can be found, the commercial prospects for aluminum-ion batteries will be broader.

Shanghai Silicate Institute developed a new high temperature resistant lithium ion battery separator

According to the official website of the Shanghai Institute of Ceramics on November 2, the team led by Yingjie Zhu, a researcher at the Shanghai Institute of Ceramics of the Chinese Academy of Sciences, teamed up with a team led by Xianluo Hu, a professor at Huazhong University of Science and Technology, before the hydroxyapatite ultra-long nanowires. Based on the research work of new inorganic refractory paper, a new type of hydroxyapatite ultra-long nanowire-based high temperature lithium-ion battery separator was developed. The relevant research results have been published in Advanced Materials and applied for an invention patent.

The battery separator has many advantages, such as high flexibility, good mechanical strength, high porosity, excellent electrolyte wetting and adsorption performance, high thermal stability, high temperature resistance, flame retardant and fire resistance, and can be maintained at a high temperature of 700 ° C. Its structural is integrity. The battery assembled by the novel hydroxyapatite ultra-long nanowire-based high temperature battery separator has better electrochemical performance, cycle stability and rate performance than the battery assembled by the polypropylene diaphragm. This research work is of great significance to greatly improve the operating temperature range of lithium-ion batteries and the safety of lithium-ion batteries. It is expected that the novel hydroxyapatite ultra-long nanowire-based high temperature battery separator can also be applied to various other types of high temperature resistant batteries and energy storage systems, such as sodium ion batteries, super capacitors and the like.

Japan has developed a fireproof and explosion-proof lithium battery that has a longer service life than traditional lithium-ion batteries.

According to a report by Xinhua net on November 30, Japanese researchers have recently developed a safer lithium-ion battery electrolyte that is not easy to burn or explode even in high temperature environments. The research results have been published in the UK's Natural Energy (Nature Energy) magazine.

Researchers from universities such as the University of Tokyo have developed a high-concentration electrolyte containing trimethyl phosphate, a flame retardant. This electrolyte is not easy to burn, and can achieve high-stability charge and discharge for more than 1,000 times or for more than one year. The service life is comparable to or even exceeds that of traditional lithium-ion batteries. The research team pointed out that this electrolyte can increase the working voltage of lithium-ion batteries from the current 3.7 volts to 4.6 volts, which will be suitable for high energy density and high safety energy storage batteries such as electric vehicles. The research team will work with related companies. Advance research.

Toshiba Corporation of Japan developed a new lithium battery for electric vehicles, which takes only 6 minutes to fast charge.

According to Xinhua News Agency reported on October 15, Japan's Toshiba Corporation developed a new generation of lithium batteries for electric vehicles, fast charging takes only 6 minutes. According to reports, this lithium battery can still maintain more than 90% of the battery capacity after charging and discharging 5000 times, and can still charge quickly in the low temperature environment of minus 10 degrees Celsius.

Toshiba began developing SCiB (Super Charge Ion Battery) as early as 2007, and has successfully applied it to many electric vehicles including Mitsubishi's iMiEV and Honda's FitEV. The current SCiB uses titanium dioxide as the anode. The lithium battery of the new electric vehicle developed by Toshiba Corporation of Japan is different from the lithium battery which generally uses graphite as the anode material. It uses titanium cerium oxide as the anode material and has the characteristics of high energy density and ultra-fast charging. The traditional electric vehicle lithium battery can only charge about 80% of the battery for 30 minutes, and the new lithium battery can charge up to 90% of the battery in just 6 minutes. The Toshiba test electric vehicle was charged for about 320 kilometers after 6 minutes of charging. At present, Toshiba has made a sample of a new generation of lithium batteries with a capacity of 50 ampere-hours and palms, and plans to improve it, and strive to launch a formal product in 2019.

Stanford scientists develop sodium-based batteries that are less expensive and more efficient than lithium batteries

According to a report by the US "Qiaobao.com" on October 10, researchers at Stanford University have developed a sodium-based battery that can store as much electricity as a lithium-ion battery, but at a much lower cost. Related research results have been published in the journal Nature Energy.

Researchers point out that lithium is the best choice for making batteries, but lithium has become rare and expensive, and humans need to use other richer elements such as sodium to develop higher performance and lower cost batteries. In newly designed sodium-ion batteries, sodium ions can be attached to inositol, a common compound that can be extracted from liquid by-products from rice bran or corn processing. The new combination of sodium and inositol significantly improves the ion cycling of sodium-based cells, allowing ions to move more efficiently from the cathode through the electrolyte to the phosphorous anode, which in turn produces a stronger current. Researchers believe the battery will help store energy from sustainable energy sources such as solar panels and wind turbines.

The University of Houston has made significant progress in the study of magnesium batteries, and new magnesium batteries make energy storage technology cheaper and safer.

According to the elector magazine website reported on September 8, the Yao Yan team of the University of Houston in the United States has made significant progress in the research of magnesium batteries, and said that the development of new magnesium batteries will be safer than lithium batteries, the research results have been published in "Natural Communication" In the magazine. In general, the energy density of magnesium batteries is generally lower than that of lithium batteries. However, by developing a new cathode material, the capacity of the magnesium battery can be increased to 400mAh/g, which is four times higher than that of the earlier magnesium battery.

The battery uses a two-dimensional layered TiS2 material which is in-situ expanded with PY14+ ions as a positive electrode, a magnesium metal as a negative electrode, and a conventional chlorine-containing magnesium electrolyte (APC) as an electrolyte. When the monovalent MgCl+ is substituted for the divalent Mg2+ as the intercalation ion, only a simple desolvation (Ea~0.8eV) process occurs during ion intercalation, the Mg-Cl bond does not break, and the MgCl+ is solid compared to Mg2+. The phase-diffusion energy barrier is significantly reduced (~0.18eV) and the diffusion rate is greatly improved. At present, the magnesium battery voltage is about 1 volt, and the next-generation battery voltage being developed can be mentioned to be close to 3 volts.

Stanford University, USA: Lithium alloy/graphene “thousand layer cake” opens a new era of lithium battery

According to the Science and Technology Daily reported on July 14, the research team of Professor Cui Wei from Stanford University in the United States developed a lithium alloy/graphene foil negative electrode. The capacity of the negative electrode is close to the theoretical volumetric capacity of lithium metal and has excellent safety characteristics. The research results have been published in the journal Nature Nanotechnology.

The researchers said that the lithium alloy/graphene “thousand layer cake” can be prepared by encapsulating closely packed lithium alloy nanoparticles in a large layer of graphene sheets. Since the lithium alloy itself is the largest volume state and is confined to the graphene "cake" with high conductivity and good chemical stability, the volume expansion of the alloy anode and the dendrite growth of the lithium metal anode are avoided. The "thousand layer cake" can also be assembled with a high-capacity sulfur positive electrode into a highly efficient, stable, long-life battery, which greatly increases the energy density and safety performance of the battery. With its high capacity, excellent cycle performance and safety features, this lithium alloy/graphene foil is expected to be used as a replacement for lithium metal anodes in next-generation lithium/air, lithium/sulfur batteries.

Professor Feng Pan from the Graduate School of Materials and Materials, Shenzhen University, made a breakthrough in the study of the properties of nano-single-particle lithium batteries

According to a report by Peking University News Network on March 20th, Prof. Feng Pan, a research group at the School of New Materials of Peking University Shenzhen Graduate School, made a breakthrough in the research on the properties of nano-single-particle lithium batteries. The relevant research results were published in the article “Advanced Energy Materials”.

The research group developed a method for preparing ultra-thin electrodes dispersed with single nanoparticles, and the particles on the electrodes were completely dispersed in the carbon nanotube network, and then electrochemically tested. At the same time, the research group developed a single-particle nano-electrochemical calculation model. The single-particle model was simulated by the experimental charge-discharge curve and CV curve to obtain the interfacial reaction constant and the lithium-ion phase-diffusion coefficient of single-nanoparticles. By measuring and simulating the single-particle information in different electrolyte environmental systems under different temperature conditions, the group first proposed the pre-factor of electrochemical interface kinetics reaction and the solvation and desolvation of lithium ions on individual particles. Process activation energy is directly related, while correlating the structure of the nanocrystal interface with the electrochemical performance of the cell.

The cost per watt hour of the lead-free lithium battery developed by Qingneng is controlled at 0.5 Yuan.

According to the Qingdao Daily reported on January 20th, the Qingdao Institute of Bioenergy and Process of the Chinese Academy of Sciences released the latest scientific research results: the first in China to develop a green and environmentally friendly lead-free lithium battery, and the cost per watt hour is controlled at 0.5 Yuan, which have the conditions of industrialization promotion.

The research and development team of Qingneng has innovatively proposed three solutions for low-cost lithium-ion battery technology, low-cost water-based zinc battery technology and new magnesium battery technology. Previously, the large number of applications of lead-acid batteries was due to their significant cost advantage, which cost about 0.5 Yuan per watt hour. The lead-free lithium battery developed by Qingneng has used a new material system such as low-cost flame retardant cellulose separator, low-cost carbon anode, fluorine-free environmentally friendly lithium borate and new technology to improve the cost per watt hour. It is controlled at 0.5 Yuan, with the equivalent of industrial conditions for the replacement of lead-acid batteries. At present, the key technologies of the three new types of batteries have been broken, and the laboratory pilot test has been completed. However, zinc batteries and magnesium batteries cannot be mass-produced at the moment, and only lithium batteries have the conditions for mass production. Qingneng is promoting the industrial cooperation with the low-speed electric vehicle manufacturer Reading Group, making low-speed electric vehicles truly an environmentally friendly means of transportation.

Panasonic launches flexible lithium battery for mass production

According to MIT Technology Review on January 6, Panasonic released three different versions of flexible batteries at this year's CES. This new lithium-ion battery can maintain 80% capacity after twisting or bending 1000 times. According to YorikoYagi, deputy director of Panasonic's Wearable Energy Department, the battery will begin mass production between April 2018 and March 2019. Panasonic has provided samples to all potential customers in October last year.

Panasonic's flexible battery is only 0.45 mm thick, and each battery is a bank card size, but its capacity is also very small. The largest capacity CG-064065 battery is only 60mAh, while the smallest model is only 17.5mAh. This means that the new battery is only suitable for low-power products such as wearable devices, card devices, and Internet of Things devices.

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