What are the difficulties of lithium titanate battery technology development and its development direction?

Titanium acid lithium battery technology development and its development direction

1. The development of lithium titanate battery technology in China

Lithium titanate battery technology in China's various energy storage battery competition should have the advantages of time, place and people. In terms of service life, the long cycle life of lithium titanate batteries is much longer than that of lead-acid batteries. Its efficiency, cost and electrochemical performance is better than sodium sulfur and liquid flow vanadium battery system.

Li-ion battery products in major markets are portable appliances such as mobile phones and laptops. The amount of China's mobile phone and laptop is big, but most do not belong to domestic brands. Domestic lithium electricity in portable electronics because of lithium electricity sales ability to lose in Japan and South Korea product.

However, the application of the technology of lithium titanate is a hybrid electric vehicle market, special industrial application and energy storage applications such as FM and grid voltage support, etc. These markets in the world are still in its infancy, which was unknown perfectly. Lithium titanate technology is expected to be a major player in these markets.

China's population accounts for about 1/5 of all over the world. Due to the large population, China's electric vehicles, energy storage and industrial application market is a huge market multinational companies in many countries covet. In recent years, the Chinese government attaches great importance to the development of electric vehicle and energy storage industry, all kinds of the state encourages the policy are introduced. Chinese lithium titanate battery system in chongqing and European hybrid electric bus, Zhang Bei scenery storage demonstration baoqing station and the shenzhen energy storage power station has been in the commercial application of data accumulated for years.

In addition, the lithium electricity industry chain upstream and downstream small already, in addition to the complete supply of battery materials and equipment manufacturing capacity, production capacity of lithium battery and Japan and Korea three points. This makes the lithium-ion battery manufacturers in China from traditional lithium electricity production transition to lithium titanate battery production has the congenital conditions.

In lithium titanate material production in China has already had a can like sichuan xing, zhuhai silver lung, huzhou micro macro, etc. There are both strength and experience of the enterprise. In respect of lithium titanate battery production stand out on behalf of the enterprise silver long huzhou micro macro, zhuhai, shenzhen bo lei da, tianjin gateway, etc.

These companies have been at home and abroad, electric vehicle and energy storage preliminary set up his own market sales channels. Especially worth pointing out is that shenzhen bo lei has produced from material production to the battery and system integration of a series of proprietary technology and intellectual property rights, is a rare Chinese lithium electricity industry with independent intellectual property rights of the manufacturer.

2. Lithium titanate materials, batteries and battery production bottlenecks

Now that technology has many other lithium battery lithium titanate incomparable superiority, why so far a few applications in the field of China's energy industry and even the world energy?  Reason has the following three aspects:

1) Lithium titanate material in the production of lithium titanate materials production in principle is not complicated. But will be used as lithium ion batteries anode materials, not only need to pay attention to material has appropriate specific surface area, particle size, density, and the electrochemical properties, etc., must also be able to adapt to mass production technology of lithium battery. Lithium titanate material in many traditional li-ion battery production line can't normal production is one of the reasons of the pH value of the material for 11 or 12, strong moisture absorption.

(2) Lithium titanate battery production in a matter of fact, the conventional lithium-ion battery production line directly used to produce titanium acid lithium battery products are not like just replace graphite with lithium titanate materials. Because lithium titanate requires is much higher humidity than conventional lithium-ion battery production. In order to control the humidity, some preparation needs to be done to adjust to adapt to the special requirements of lithium titanate battery production. In addition, some production equipment also needs to make a corresponding improvement. If conditional word, best can specially designed for lithium titanate battery products to a compact structure, small volume, fully enclosed the automation of the production line.

(3) Lithium titanate battery pack unlike conventional lithium-ion batteries, the production of lithium titanate battery at home and abroad put into application in group after a period of time often see soft package of monomer battery with trace gases. These gases are different from those produced when fresh batteries are melted. The former can through production process to remove the battery. But the latter is in the process of our battery, or under the condition of the current process is hard to avoid.

The author thinks that, to study the chemical reaction mechanism of cycle gas produces should be a good research topic. In addition, due to the lithium titanate battery technology is one of the advantages of its high power performance. Although the battery itself can bear large current charge and discharge, but the thickness of the monomer battery is still not suitable for high power applications because the battery is too thick will cause the large current generated as difficult to heat. So for high power lithium titanate battery, size large, thin, soft package cell structure is still a reasonable choice.

3. The future development direction of lithium titanate technology

Finally, the necessary comprehensive summarize lithium titanate material as the advantages and disadvantages of li-ion battery cathode, advantage: high security, long life, high and low temperature working range wide, high power, low cost, and green environmental protection. Disadvantage: lithium titanate material energy density low, water imbibition is strong, the battery produced by high environmental requirements, the production process to do the corresponding update, the new process need to invest the necessary equipment and higher requirement of humidity control, as well as the application of lithium titanate battery market has not fully open.

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