American Comic Super Power Exchange System

Of course, battery technology has also been making breakthroughs. Rather than saying that batteries have slowed down the development of all walks of life, it is better to say that all walks of life are developing too fast, and battery technology cannot keep up.

After more than ten years of development, the rated capacity of the battery has indeed more than doubled, but taking the CPU of the mobile phone as an example, the performance of the CPU has increased by about 50 times in just seven or eight years. The performance is improved by more than 85 times.

Therefore, battery life is the biggest obstacle for mobile phones at present. If one day, batteries with larger capacity and faster charging and discharging can be produced.

Then it will definitely bring a revolutionary change to the mobile electronic equipment industry, and even affect the field of electric vehicles, so that electric energy can truly replace existing energy sources, and electric vehicles can truly replace existing internal combustion engine vehicles.

And the breakthrough to change all this is also in graphene.

If a capacitor battery made of graphene is used, the charging and discharging speed is at least 1000 times faster than that of ordinary batteries. The graphene battery of the same volume also has several times or even more than ten times higher energy storage than lithium batteries.

The service life of the battery can also be several times longer than the lithium battery, but its cost is only about 20% of the current lithium battery.

This shows why graphene is called the king of materials.

Of course, in the Iron Man memory obtained by Lin Xuan, there is still a material that is better than graphene, which is a synthetic nanomaterial improved on the basis of graphene.

Its performance is dozens of times that of graphene, but the equipment needed to prepare this material is still difficult to manufacture with the current level of technology and materials.

Therefore, Lin Xuan can only use graphene to raise the existing technology and production equipment to a new level, and then further prepare more excellent materials.

Although graphene is good, and the raw materials are extremely cheap and abundant, it is well known that the preparation technology of graphene is not mature.

At present, the most common preparation methods are mechanical stripping method, redox method, SiC epitaxial growth method and chemical vapor deposition method.

Among them, the production efficiency of the mechanical stripping method is too low. Although the redox method is simple to operate and has high yield, the product quality is relatively low.

Although the SiC epitaxy method can obtain high-quality graphene, this method requires high equipment and cannot be mass-produced.

The most likely way to achieve industrialized preparation of high-quality, large-area graphene is chemical vapor deposition. Unfortunately, the cost of preparation at this stage is relatively high, and the process conditions need to be further improved.

Therefore, the preparation technology of graphene is a difficulty that all scientists in this field are trying to overcome.

However, Lin Xuan has acquired the memory of Iron Man, but has a very mature graphene preparation technology, which is also different from all existing preparation technologies.

The principle is to directly break the van der Waals force between different layers of graphite, and then make graphite crystals naturally peel off countless graphene materials.

It should be known that in graphite crystals, carbon atoms in the same layer form covalent bonds by sp2 hybridization, and each carbon atom is connected to three other atoms by three covalent bonds.Six carbon atoms form a regular hexagonal honeycomb-like structure on the same plane, and stretch into a sheet structure, and this single-layer structure is actually graphene.

Moreover, the bond lengths of the chemical bonds formed between carbon atoms are all 142 pm, which belongs to the bond length range of atomic crystals. This kind of bond between carbon atoms is very strong and extremely difficult to break.

Graphite crystals can be understood as complex crystals formed by combining countless layers of graphene with van der Waals forces, but the distance between layers is 340pm, which is relatively large, and belongs to molecular crystals. The van der Waals forces between such molecular crystals are also relatively large. easy to break.

Therefore, the preparation method mastered by Lin Xuan starts with this van der Waals force. Under a certain ultra-low temperature environment, ultrasonic pulses of a certain frequency can directly destroy this van der Waals force, allowing the stone milled crystal to be peeled off. , forming a layer of graphene material.

This method sounds simple, but the current level of scientific research has not yet found an effective method to break this van der Waals force. Even if the experimental direction is found, but the two necessary conditions of temperature and sound wave frequency are satisfied at the same time, it is estimated that it will take several years or even longer. time.

...【Thank you for the reward of 588 coins from book friend Ye Luo Broken Heart, 100 coins from Buried Rain, and 2012 coins from Tanlang, Memory Ruocheng, and Xuzhou Pirated Bookworm 10! 】

Chapter 79 Fee Upgrade

The preparation method mastered by Lin Xuan can prepare large-size and high-quality graphene materials, and the method is simple and low-cost, and the requirements for equipment are not high. The current level of technology can completely build this preparation equipment. Then mass production.

So Lin Xuan's next plan is to find the government to grant land and build his own graphene production factory.

Now he has sufficient funds in his hands, and when the smart voice butler starts to upgrade, he will have more financial support, which is completely enough for him to build a graphene production plant.

However, since the company is currently busy charging for upgrades to the intelligent voice steward, he is not in a hurry.

"It won't be too late to start building the factory after the smart voice manager completes the upgrade fee!" Lin Xuan muttered to himself, lying on the sofa with his eyes closed, and gradually fell asleep without knowing it.

At 2016:1 on January 1, [-], the smart voice manager will be automatically upgraded. All mobile phones with smart voice manager installed will automatically download the upgrade package as long as they are connected to the Internet for automatic upgrade.

After the upgrade is completed, if the user wants to continue using the smart voice manager, he must register an account, and then purchase a verification code online to activate it.