According to foreign media reports, scientists at the Nano Biology Laboratory (NBL) of the Singapore Science and Technology Research Institute (A * STAR) have developed a novel method to prepare the next-generation lithium-sulfur battery cathode, and this method simplifies the lithium-sulfur battery cathode time-consuming And complex production process. The study shows that there is hope for the commercialization of lithium-sulfur batteries, and it solves a challenge in the industry that requires a practical method to mass-produce materials that can improve battery performance.
Although it is generally believed that lithium-ion batteries are an advanced technology that can effectively provide power for modern communication devices, due to their inherent unstable electrochemical properties, there are shortcomings such as limited storage capacity and insufficient security. However, the NBL research team has developed a new simplified technology that can develop lithium-sulfur battery cathodes from inexpensive commercial materials, thus changing the status quo. In theory, sulfur has a high energy density, low cost, and abundant reserves, which will help to popularize lithium-sulfur battery systems and replace lithium-ion batteries.
In theory, lithium-sulfur batteries can store 10 times more energy than lithium-ion batteries, but so far, such batteries cannot be repeatedly charged and discharged. The cathode of the lithium-sulfur battery developed by NBL shows a good specific capacity, up to 1220 mAh / g, which means that every 1g of cathode material can store 1220 mAh of charge. In contrast, the specific capacity of a typical lithium ion battery cathode is 140 mAh / g. In addition, the cathode of NBL's lithium-sulfur battery maintains a high capacity after more than 200 charge cycles, and the performance loss is minimized. The key to achieving this performance is that NBL uses a unique two-step cathode preparation method.
Before adding sulfur, the researchers constructed a carbon scaffold to obtain a 3D interconnected porous nanomaterial. Different from the traditional method of preparing the cathode, this method can prevent the carbon support from collapsing when the battery is charged. In the early stage of battery charging and discharging, the cathode carbon scaffold prepared by the traditional method will collapse, resulting in changes in the entire battery structure. Eventually, the density of conventional cathodes becomes higher, the surface area is smaller, and the pores are also smaller, which leads to lower battery performance than NBL batteries. In fact, the specific capacity of the NBL cathode is 48% higher than that of the sulfur cathode prepared by the traditional method, and the capacity fade rate is reduced by 26%. If more sulfur is added to the cathode, the practical surface area capacity of the NBL cathode is as high as 4 mAh / cm2.
NBL researchers are not only designing and optimizing the cathode, but also using nanomaterial technology to design and optimize the anode, battery separator and electrolyte. The goal of the researchers is to develop a complete lithium-sulfur battery system. Compared with traditional lithium-ion batteries, the system will have a stronger energy storage capacity, and will have a longer life than existing batteries. Electric vehicles and grid energy storage bring great benefits. (The pictures in the text are from the Singapore Science and Technology Research Council)
Vacuum Tube Collectors include CPC Solar Collector, U-shape solar collector without CPC, heat pipe Vacuum Tube Solar Collector, LPC open loop collectors. No matter pressurized or non-pressurized collectors, they are called vacuum tube solar collector once it consists of all glass Vacuum Tubes .
CPC solar collector is the highest efficiency among all Vacuum Tube Solar Collectors.
Advantages
and benefits
- Short installation times due to complete pre-assembled collectors.
- Simple and reliable connection technology in order to extend several
collectors side by side through pre-assembled screw connections. Further
tubing and an extensive thermal insulation is not necessary.
- Integrated return pipe and highly efficient thermal insulation.
- Manageable module sizes for a very high performance and a quick and
easy installation.
- Flow and return pipes may be fitted on the left or the right side of the
manifold.
- High flexibility due to the different widths and lengths of the
collectors.
- Quick and easy exchange of the evacuated tubes without using any tools.
Vacuum Tube Solar Collectors
Vacuum Tube Solar Collector,Vacuum Tubes Solar Water Collector ,Vacuum Tube Heat Solar Collector,Evacuated Vacuum Tube Solar Collector
Linuo Ritter International Co.,Ltd , https://www.lnrtsolarenergy.com