Will lithium-sulfur batteries dominate the future?

Recently, during the 25th World Electric Vehicle Conference, Zhong Xinlei, Chairman of the Board of Directors of Zhongju Leitian Power Battery Co., Ltd., said at the Global New Energy Vehicle Innovation and Development Forum that the company’s rare earth lithium-sulfur battery will be Mass production began in 2012, and due to the outstanding performance of lithium-sulfur batteries, future energy storage devices for electric vehicles will use more of this power battery. Li Shengmao, a senior researcher at China Investment Consulting, pointed out that the problem of low energy density and high cost of power batteries for new energy vehicles has been plaguing domestic and foreign new energy vehicle manufacturers.

Li Shengmao, a senior researcher at China Investment Consulting, pointed out that the problem of low energy density and high cost of power batteries for new energy vehicles has been plaguing new energy vehicle manufacturers at home and abroad. In order to solve this problem, power battery manufacturers have recently started research and development. High-energy batteries with low production costs, some companies have introduced high-energy battery samples such as metal (aluminum, zinc, etc.) air batteries and lithium-sulfur batteries, which brings hope to the new energy vehicle industry to break through the technical bottleneck of power batteries. If the lithium-sulfur battery of Zhongju Leitian can be launched in large quantities in 2012, the time for industrialization of domestic electric vehicles is likely to be greatly advanced.

Li Shengmao pointed out that lithium-sulfur batteries are highly anticipated by related parties because they have many obvious advantages compared with the more mainstream lithium iron phosphate batteries in the market. First, theoretically, the energy density of lithium-sulfur batteries far exceeds most types of power batteries. According to the “2010-2015 China Electric Vehicle Industry Investment Analysis and Forecast Report” recently released by China Investment Consulting, although there is still some debate about the highest energy density of lithium-sulfur batteries, there is still some debate in the industry, but it is certain The maximum energy density is theoretically not lower than 1000 watt-hours/kg, while the current domestic mass-produced lithium iron phosphate battery has an energy density of mostly less than 100 watt-hours/kg, and the space for improvement is not large. Obviously, from the perspective of energy storage efficiency, lithium-sulfur batteries are more suitable as automotive power batteries.

In addition to the very high energy density, lithium-sulfur batteries have some other advantages. On the one hand, their production costs are relatively low. Since lithium-sulfur batteries mainly use sulfur and lithium as raw materials for production, the production cost is relatively low; on the other hand, lithium-sulfur batteries are low in toxicity after use, and the energy consumption for recycling is small.

Li Shengmao pointed out that although lithium-sulfur batteries have obvious advantages compared with many types of power batteries, they also have some shortcomings. At present, the biggest disadvantage of lithium-sulfur batteries is that their recycling times are relatively low. Because the vulcanized polymer has relatively poor stability characteristics, the current lithium-sulfur battery recycling frequency is much lower than the ordinary lithium iron phosphate battery, which greatly increases the use cost of the lithium-sulfur battery. It can be said that as long as this performance disadvantage of the lithium-sulfur battery is not changed, it is difficult to promote it on a large scale.

Zhang Yulin, research director of China Investment Consulting, pointed out that although the performance of lithium-sulfur batteries will be very advanced in theory, it is very difficult to turn theory into a reality product. The United States plans to set the energy density of lithium-sulfur batteries to 500Wh/kg in 2013, while Japan, the world's power battery technology powerhouse, plans to achieve the above goals in 2020, which reflects the development of lithium-sulfur batteries is very difficult and developed. The country still has major differences on when it can overcome some of the technical bottlenecks of lithium-sulfur batteries.

Recently, during the 25th World Electric Vehicle Conference, Zhong Xinlei, Chairman of the Board of Directors of Zhongju Leitian Power Battery Co., Ltd., said at the Global New Energy Vehicle Innovation and Development Forum that the company’s rare earth lithium-sulfur battery will be Mass production began in 2012, and due to the outstanding performance of lithium-sulfur batteries, future energy storage devices for electric vehicles will use more of this power battery.

Li Shengmao, a senior researcher at China Investment Consulting, pointed out that the problem of low energy density and high cost of power batteries for new energy vehicles has been plaguing new energy vehicle manufacturers at home and abroad. In order to solve this problem, power battery manufacturers have recently started research and development. High-energy batteries with low production costs, some companies have introduced high-energy battery samples such as metal (aluminum, zinc, etc.) air batteries and lithium-sulfur batteries, which brings hope to the new energy vehicle industry to break through the technical bottleneck of power batteries. If the lithium-sulfur battery of Zhongju Leitian can be launched in large quantities in 2012, the time for industrialization of domestic electric vehicles is likely to be greatly advanced.

Li Shengmao pointed out that lithium-sulfur batteries are highly anticipated by related parties because they have many obvious advantages compared with the more mainstream lithium iron phosphate batteries in the market. First, theoretically, the energy density of lithium-sulfur batteries far exceeds most types of power batteries. According to the “2010-2015 China Electric Vehicle Industry Investment Analysis and Forecast Report” recently released by China Investment Consulting, although there is still some debate about the highest energy density of lithium-sulfur batteries, there is still some debate in the industry, but it is certain The maximum energy density is theoretically not lower than 1000 watt-hours/kg, while the current domestic mass-produced lithium iron phosphate battery has an energy density of mostly less than 100 watt-hours/kg, and the space for improvement is not large. Obviously, from the perspective of energy storage efficiency, lithium-sulfur batteries are more suitable as automotive power batteries.

In addition to the very high energy density, lithium-sulfur batteries have some other advantages. On the one hand, their production costs are relatively low. Since lithium-sulfur batteries mainly use sulfur and lithium as raw materials for production, the production cost is relatively low; on the other hand, lithium-sulfur batteries are low in toxicity after use, and the energy consumption for recycling is small.

Li Shengmao pointed out that although lithium-sulfur batteries have obvious advantages compared with many types of power batteries, they also have some shortcomings. At present, the biggest disadvantage of lithium-sulfur batteries is that their recycling times are relatively low. Because the vulcanized polymer has relatively poor stability characteristics, the current lithium-sulfur battery recycling frequency is much lower than the ordinary lithium iron phosphate battery, which greatly increases the use cost of the lithium-sulfur battery. It can be said that as long as this performance disadvantage of the lithium-sulfur battery is not changed, it is difficult to promote it on a large scale.

Zhang Yulin, research director of China Investment Consulting, pointed out that although the performance of lithium-sulfur batteries will be very advanced in theory, it is very difficult to turn theory into a reality product. The United States plans to set the energy density of lithium-sulfur batteries to 500Wh/kg in 2013, while Japan, the world's power battery technology powerhouse, plans to achieve the above goals in 2020, which reflects the development of lithium-sulfur batteries is very difficult and developed. The country still has major differences on when it can overcome some of the technical bottlenecks of lithium-sulfur batteries.

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