Under the current technical conditions, battery capacity and volume are forming a proportional relationship. The larger the volume, the longer the power will be.
This is a very difficult thing to do. At present, in the world, the development of battery storage capacity mainly adopts two methods, one is to find a better electrode material, and the other is to change the processing technology of the battery. Guo Yuguo, a researcher at the Institute of Chemistry of the Chinese Academy of Sciences, told CBN Weekly that the former's exploration has approached the limit, and the latter's cost is too expensive to enable large-scale production. Guo Yuguo is a member of the Solid State Ionology Branch of the China Institute of Ceramics. He also worked as a project researcher in the Major Project of Nano Energy Chemistry of the Max Planck Society of Germany.
A complete charge and discharge process is the process of lithium ions moving to the poles of the battery. Charging is to send lithium ions to the positive pole of the rechargeable battery. When all the lithium ions reach the positive electrode and fill the gap between the graphene materials, the battery is full; on the contrary, when the lithium ion power is gradually lost, they are It will move to the negative pole. When all the lithium ions reach the negative pole, the power is exhausted.
This is why the larger the battery, the stronger the power. Because of the larger battery positive electrode, more charged lithium ions can be absorbed.
The common rechargeable batteries at the moment are all lithium-ion batteries. The anode of each lithium-ion battery is loaded with graphene material. More simply, this is a carbon layer that is used to adsorb lithium ions that store electricity.
In order to improve the adsorption capacity for lithium ions, attempts have been made to improve electrode materials more than once.
Harold Kung, a professor of chemical and biological engineering at Northwestern University in Chicago, came up with a way to sandwich another silicon-absorbing material, silicon, between graphene. In the test, silicon can store up to 10 times more lithium ions than graphite.
During charging and discharging, graphene and silicon expand and contract together, and graphene can ensure the shape of silicon is stable and does not rupture. This method really makes the battery's storage capacity 10 times. However, its shortcomings were quickly exposed. Kung later admitted that after 150 cycles of charging, its power storage and charging speed would plummet, and the durability of the product was far from satisfactory.
Another California-based startup, Amprius, is experimenting with a silicon nanowire that can bend, swell, and move around, accommodating lithium ions. This technology requires a completely new process that has not been used in battery manufacturing before, and is costly.
But scientists at the Lawrence Berkeley National Laboratory seem to have found a new way. They are working on a technology that can increase the battery's power capacity by more than 30% and can be smaller and more durable. More critically, this technology can be implemented on existing manufacturing processes without excessive cost.
They plan to replace graphene with silicon instead of mixing the two. One thing is undeniable, that is, in all the solutions that have been explored, silicon materials have the best adsorption capacity for charged lithium ions.
However, the use of silicon on the positive electrode of the battery is still a big problem. A metaphor of Liu Gaozuo, a researcher at the Lawrence Berkeley Laboratory's Department of Environmental Energy Technology, is that graphite is like a sponge. When it absorbs lithium ions, it retains its shape; but silicon is more like a balloon, during charging and discharging. Expansion and contraction, once it breaks, it completely loses its conductivity.
Graphene is not a binder after all, it can't stick to the silicon particles that may break, keep them highly conductive and flexible. This is why Kung's plan failed.
Yes, the adhesive, Liu Gao plans to "stick" the silicon material on the positive electrode of the battery. In the current battery manufacturing process, a binder is applied to the surface of the graphite particles. The concept of using adhesives does not require major changes to existing manufacturing processes and does not impose additional technical burden on the manufacturer.
"Using the combination of silicon and new adhesives is indeed the most effective breakthrough in the current state of the art." Guo Yuguo said.
Another key role of this program is 3M. Liu Gao’s team is currently working with 3M to test a new type of adhesive. As a world-renowned chemical materials company, 3M has maintained a leading position in the field of adhesive research.
Together with some theoretical chemists, Liu Gao looks for electrical properties in the many polymers offered by 3M. Once discovered, it is necessary to find ways to make them more viscous, which requires long and boring tests.
The experimental team has tested 650 charge cycles. They have tested an adhesive that is also used on batteries made of other materials, including batteries made of tin. Liu Gao has now obtained the patent for this adhesive.
3M also confirmed that its plant plans to expand the production scale of "silicon-based battery materials" to prepare for the mass production of new batteries in the future.
This "future" may not be too far away. According to the published data, using silicon materials and adhesives, the new battery can achieve a storage capacity of 1400 mAh per gram, which means that it will fully discharge the current to 1300 mA in one hour. The number is much higher than the 300 mAh of conventional anode storage.
This is good news. Future electronic products may not encounter the embarrassment of Apple's "New iPad": New iPad has increased the thickness of the product from 8.8 mm of the previous generation to 9.4 due to various considerations such as improving battery capacity. Millimeter. But even if it is only 0.6 mm, some users do not buy it, which is considered to be contrary to the tradition of Apple's new generation of products will be lighter and thinner, and affect the use.
If the new battery can be applied to larger equipment such as pure electric vehicles , it will be another scenario. For example, you can drive an electric car for a long trip without having to rely heavily on the charging station as it is now.
You see, upgrading the battery can actually be a part of improving the user experience.
2023 New Hot Sale Fiber Laser Cutting Machine A Series
The imported helical gear design of the reducer can withstand greater torque than the general straight tooth output.
High precision, small product volume, low noise, fully enclosed design, to ensure that the lubricating grease does not leak, and the transmission efficiency is as high as 95%.
The internal components are made of alloy steel, which can cope with various harsh environments.
Laser head structure
1.The Z axis refers to the direction in which the laser head moves up and down
2.Structural composition: 1. Servo motor; 2. Guide rail slider; 3. Mounting seat; 4. Laser head, etc.
3.Structure introduction: It can adapt to different specifications of pipes by adjusting the up and down movement of the laser head.
4.Structural advantages: the mechanism is simple, stable and easy to operate.
The Z-axis can be both follow-up and numerically controlled: in order to solve the problem that the laser focus fluctuates due to the uneven surface of the pipe, which affects the cutting quality, the cutting head (Z-axis) must follow to keep the focus constant. In addition to the follow-up function, the Z axis of the cutting machine also has the same display and control functions as the X and Y axis.
Graphic display: The machine has the functions of analog graphic display and dynamic graphic tracking display for the edited part program, which makes the processing more intuitive and easy to monitor and control.
Multiple alarm functions: The CNC system of the machine has the functions of self-checking, alarming and automatic protection, and also has alarm display and automatic protection for external conditions.
CNC control system: The system adopts an integrated structure, central control and display operation unit structure. The system is based on windows CNC system. The display operation unit provides a good man-machine interface and displays various operation information. The operation panel has function keys for machine tool operation.
Low-voltage electrical system: The low-voltage electrical system is located in the electric control cabinet, which is the interface part of the electrical control of the whole machine. The power supply, relays, circuit breakers, contactors, and servo drive systems required by the electrical control system are installed in the electric control cabinet.
Using high-quality stainless steel cold water circulating pump, large flow, high lift, low noise, long life; stainless steel water tank, pipeline, stainless steel valve will never worry about rust.
The control system adopts LCD full Chinese (or full English) computer controller, CPU automatic control, simple and intuitive operation. The control accuracy is as high as ±0.1℃; it has the function of automatic fault diagnosis, which directly displays the fault point on the screen, prompting the user to deal with it quickly. And the fault signal can be directly transmitted to the CNC numerical control system through the data line to avoid damage to components and equipment.
Provides multiple protection functions, passive alarm terminals, and remote control terminals, which are easy to realize centralized control and monitoring of CNC; among them, the "dual temperature type" precision water cooler provides stable and accurate water temperature control for the laser, and also provides a channel with The water temperature similar to the ambient temperature is used for lens cooling, which solves the problem of damage to the lens caused by condensation when cooled with low-temperature water, and is the best choice for cooling the entire laser equipment.
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