Will graphene become the next breakthrough for lithium batteries?

by:CTECHi     2021-07-28

Do you guess that graphene will be the breakthrough for the next generation of lithium battery packs? Lithium battery packs are gradually being adopted by many companies due to the advantages of safety and environmental protection, small size and light weight, large capacity, long service life, and fast charging. And accept. In the context of the development of high energy density for lithium battery packs led by national policies, do you guess that graphene will be the breakthrough point for the next generation of lithium battery packs?

Since this year, The lithium battery pack market is eager for graphene materials, and many manufacturers and scientific research institutions have tried more and more applications of graphene as a new battery material. Graphene is a two-dimensional crystal with carbon atoms arranged in hexagons and connected to each other to form a carbon molecule. Its structure is very stable.

Zhejiang Unilink Nano Technology Co., Ltd. invested 160 million yuan in the construction of a ternary cathode material construction project for graphene lithium-ion batteries. The project covers an area of u200bu200b40 acres. After the project is completed, it will have an annual production capacity of 6000T/a graphene lithium-ion battery cathode materials. Previously, the Gaoming team of Zhejiang University developed a new type of aluminum-graphene battery, which can be charged in just a few seconds. It is still full of electricity after 250,000 cycles of charging and discharging. It has shown that it is heat-resistant and frost-resistant, and repeated bending does not affect its function. And other excellent characteristics, showing the general prospects for use.

So, will graphene be a breakthrough for the next generation of materials for lithium battery packs?

Graphene material characteristics:

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Graphene has a unique two-dimensional structure, excellent performance and various potential applications. Graphene-based nanomaterials are a very attractive electrode material for lithium-ion batteries. , Especially for high energy density and high power density batteries. The graphene battery is a new type of battery developed by using the characteristics of rapid and large shuttle movement between the graphene surface and the electrode of lithium ions.

Together with the layout of graphene lithium-ion batteries from related manufacturers in the lithium battery industry chain, it may accelerate the emergence of graphene lithium-ion batteries.

Graphene is an important option for high-energy-density batteries

Leading the development of lithium battery packs towards high-energy density in national policies In the context, graphene materials are good candidates for next-generation battery materials. Graphene has always been considered a representative material in the new generation of materials. The graphene peeled from graphite is a thin carbon atom film, which is characterized by high physical and chemical stability. The material is 100 times more conductive than copper; it is more than 140 times faster than silicon. This is the reason why graphene spherical batteries charge five times faster than existing rechargeable batteries. With its excellent material properties, graphene has been favored by research institutions and lithium battery pack companies.

The new battery material 'graphene ball'

The new battery material 'graphene ball' is better than the existing lithium ion The charging capacity of the battery is 45% higher, and the charging speed is increased by more than 5 times. Researchers have found that after adding silica to the high-strength, high-conductivity graphene material, a large amount of graphene can be synthesized. The synthesized graphene presents a three-dimensional shape like popcorn, so it is called 'graphene ball' , After the graphene ball material is used in the anode protective film and cathode material of lithium-ion batteries, the charging capacity can be increased, the charging time can be shortened, and the high-temperature stability can also be guaranteed.

Graphene new energy industrialization project

At the end of March this year, the graphene new energy project settled in Yinchuan Economic and Technological Development Zone The energy industrialization project plans to invest 8.5 billion yuan to implement 5 projects including an annual output of 30,000 tons of graphene modified ternary materials and 10,000 tons of graphene conductive paste projects. After the project is completed, graphene can be formed in Yinchuan City The basic industrial chain of energy storage materials has formed a scale with an annual output value of more than 15 billion yuan.

Defects of graphene materials

Some scholars believe that graphene batteries may only exist in the laboratory. Popularization of commercialization is still relatively difficult. They believe that the repeatability of graphene work is often very poor, and the technology and practical goals are seriously disconnected.

Materials are one of the three pillars of modern civilization. The discovery of new materials and cross-domain applications play a vital role in the development of science and technology. The battery industry has moved from traditional lithium batteries to later cobalt-lithium batteries to the high nickel of today's batteries. Graphene may be a breakthrough for the next generation of materials for lithium battery packs.

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