Why do you say the future of lithium sulfur batteries is the lithium battery

Power battery is the heart of the electric car, it is the key to the development of new energy automotive industry.Although our country power battery industry in great progress after years of development, but the current power battery products energy density and the cost is still difficult to meet the demand of new energy automobile popularization.

In the face of growing power battery development trend, our country through policy guidance and supporting the new energy has become the world's largest car market.And according to the scheme of the four ministries jointly issued pointed out that the power battery is the heart of electric vehicles, is the key to the development of new energy automotive industry.Although our country power battery industry in great progress after years of development, but the current power battery products energy density and the cost is still difficult to meet the demand of new energy automobile popularization.Based on the development and power battery technology policy, in LiXiao.Miao's point of view, lithium electricity companies need to break through Lithium ion batteries Limit, timely layout exploration in respect of lithium battery research and development, prospects for lithium sulfur batteries.

He said there's rush to three yuan material for the anode of lithium ion battery, its energy density in the next one to two years will be close to the theoretical value, it is difficult to more than 350wh/kg, and to make more than 400wh/kg secondary battery, the need to develop a new one The lithium battery System, also known as the lithium battery era;Lithium battery system or will rise, to the development of lithium electric field and to explore the methods and may provide more.

Lithium sulfur batteries as sulfur battery anode, metal lithium as negative electrode of a lithium battery.Using sulfur as the anode material of lithium sulfur batteries, sulfur theoretical specific capacity and battery than energy respectively achieved 1675mAh/g and 2600wh/kg, far higher than the current commercial lithium-ion batteries.Elemental sulfur is abundant in the earth, and oil refining by-products can provide rich in sulfur, sulfur so price is very low, only 1000 yuan/ton, compared to lithium ion battery anode material of lithium carbonate per ton as high as 160000 yuan of above, the raw material prices vary more than 160 times.

So Dr LiXiao.Miao's thought to sulfur do the anode of lithium sulfur batteries is a very promising lithium battery.In addition, because lithium sulfur batteries are extremely, elemental sulfur and carbon negative extremely single lithium metal composition, sulfur extremely easy sublimation, simple heating can be sulfur recycle in the anode, the future of waste lithium battery recycling is relatively simple, the cost is low;And transition metal oxides as the anode of lithium ion battery recycling process complex, recovery of precious metals in the anode material, the pickling both high temperature calcination method and wet method, not only high energy consumption, big difficulty, also easy to cause more serious secondary pollution.

In recent years, the institute of colleges and universities at home and abroad related to the material and electrochemical laboratory basic are carried out for the development of lithium sulfur batteries.Lithium battery research and development companies of foreign countries: OXIS and SIONPOWER have been conducting lithium battery research and development.Including SIONPOWER company in 2010 will be the lithium sulfur batteries used in large UAV, broke the world record three unmanned aerial vehicle (UAV) flight: flight 20000 meters above the highest and longest aloft (14 days), the lowest working temperature (minus 75 ℃).Cannot be realized and the current lithium ion battery for unmanned aerial vehicle (UAV) empty for a long time in high temperature environment.Considering the safety of lithium sulfur batteries are still not fully solved, therefore, lithium sulfur batteries in the future will be the first to apply and unmanned aerial vehicle (UAV), the UAV has a very wide range of application fields are also in the future.

Despite the lithium battery research and development has been aroused the attention of the enterprise, but most of domestic r&d team started after 2011, entered the industrialization of lithium sulfur batteries developed only chemical defense research institute, Chinese academy of sciences,special science and technology university, such as a few a few, in addition to promote research and development of lithium sulfur batteries industrialization is faced with some problems to be solved.LiXiao.Miao states the industrialization of lithium sulfur batteries of the four major bottleneck problem: at present the positive elemental sulfur non-conductive has basically solved the problem.Fruit of valve discharge intermediate dissolve spread also eased;After sulfur discharge volume expansion leads to the anode structure destruction also got inhibition;For lithium metal anode, after repeated charge and discharge cycle caused by lithium pulverization, makes the short battery life and the security problems become lithium sulfur batteries bastion of industrialization road finally break through.

At present, the domestic development of lithium sulfur batteries also have made great progress, according to the data shows that despite the high energy density lithium sulfur cycle life of the battery is difficult to more than 300 times, but low energy density (220wh/kg) of lithium-sulfur battery cycle life can reach more than 1000 times, high energy density lithium sulfur batteries can reach more than 500wh/kg (the current domestic reported the highest can amount to 900wh/kg), almost 3 ~ 5 times that of lithium ion."Although the lithium sulfur batteries there are lots of problems in the process of the real practical, but I believe that it is still the most likely the next generation of high energy density, secondary battery in the future, lithium sulfur batteries will be represented by Ternary polymer lithium battery Market caused great shock." LiXiao.Miao said optimistically.

"Made in China 2025" LiXiao.Miao states: "continue to support the development of electric vehicles, fuel cell cars, master automobile low carbon core technology, informationization, intellectualized, increasing power battery, drive motor, advanced efficient internal combustion engine, gearbox, lightweight materials, such as intelligent control the core technology of engineering and industrialization ability."The current policy in the country is good, and the development of technology, driven by new energy enterprises need to enhance investment in research and development, the urgent task is to accelerate the crack and break through the lithium cathode technology difficulties, in order to avoid facing the lithium ion battery cathode material now occupied by foreign core technology;Also because of lithium sulfur batteries of the industrialization of the research and development is still in its infancy, is China's new energy companies ahead for lithium-sulfur battery power in the best period in the future.

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