Li-S (鋰硫) 電池技術的開發情形、預測
Li-Sulfur Battery Technology Development Status and Forecast
|出版日期||內容資訊||英文 168 Pages
|Li-S (鋰硫) 電池技術的開發情形、預測 Li-Sulfur Battery Technology Development Status and Forecast|
|出版日期: 2018年10月05日||內容資訊: 英文 168 Pages||
本報告提供Li-S (鋰硫) 二次電池市場發展相關的總括性調查，Li-S二次電池的概念的體制化和到目前為止的開發趨勢，Li-S二次電池的開發相關技術障礙的現狀及零組件/材料開發的理解，Li-S電池的材料結構相關最新趨勢，及主要企業的Li-S電池應用案例等彙整資料。
Rapid social development and economic growth have been achieved by utilizing fossil fuel-based energy sources. However, fossil fuels are not sustainable, causing numerous environmental problems. Many researchers have put a lot of effort into realizing new ideas on how to develop renewable energy resources, such as wind, water, or sun, in the most efficient way, without incurrence of further ecological catastrophes. Nevertheless, since most renewable energy sources are intermittent, an Energy Storage System is necessary at any cost to store renewable energy sources with the changing power.
For the last 25 years, Li-ion rechargeable batteries (LIBs) have been most widely used as a secondary battery for energy storage, whose technological growth has also been very rapidly accomplished. As the LIBs have no higher voltage, higher energy density, and memory effects, compared to other secondary batteries and do have a long cycle life, a good conservative property, a high power output, they have been utilized as a power source for mobile electronic devices, such as mobile phones, laptops, camcorders, and power tools; in recent years, now that greenhouse gas (GHG) regulations have been globally introduced according to the climate change, the usage range has been expanding into the use for energy storage, such as electric vehicles (xEV) and ESS (energy storage system). Currently, the LIBs, which are applied as a secondary battery for electric vehicles, reveals the mileage limit due to their physical limit (maximum energy density: up to 250 Wh/kg) (Figure 1.1); in order to materialized an electric vehicle which has the mileage level similar to that of gasoline vehicles, it should be necessary to develop a next generation secondary battery having an energy density higher than that of LIBs. Furthermore, it is time to develop a next-generation secondary battery that meets the demands for the safety improvement of secondary batteries due to the increase of the energy density of the secondary battery system and for price reductions on the secondary battery system which accounts for more than half of the total price of an electric vehicle.
The Lithium-Sulfur (Li-S) secondary battery is a battery made up by utilizing sulfur as a cathode material and lithium metal as an anode material, and is a secondary battery as well with the properties of lower prices and higher energy density, where the oxidation reaction of lithium may occur in the lithium metal of an anode and the reduction reaction of sulfur in a cathode, when discharging. The Li-S secondary battery expresses a high value (500 Wh/kg or more) in the theoretical energy density, which is corresponding to about two times of the LIBs; is enabled for the high power output; and could make the mileage more than doubled compared to the conventional LIBs, when applied to electric vehicles, due to its excellent low temperature property (maintaining the capacity of up to 50% even at -70°) (Figure 1.2). Unlike the LIBs, because domestic supply and demand for cathode materials is enabled and the price is lowered, the production cost of a battery could be reduced. According to the reports by McKinsey and Lawrence Berkeley National Laboratory (LBNL) in 2012, they suggested that the Li-S secondary battery Sulfur rechargeable batteries are the most promising as energy storage media capable of achieving $65/kWh of a raw material charge, based on 100,000 electric vehicles (Figure 1.3). In addition, as sulfur, the main material of Li-S secondary batteries, has an abundant yield and could be acquired from by-products or wastes in the oil refining process, it is easy to secure the materials for it; moreover, since it is nontoxic and eco-friendly, it has surly the limelight as a next-generation secondary battery. Therefore, it is expected that if Li-S secondary batteries are developed and applied to the energy storage system and medium- or large-sized secondary batteries for electric vehicles, they could lead the structure of market competition and play a greater role in selecting the next generation energy technologies, based on such technologies.
This report would provide a comprehensive description on the development of Li-S rechargeable batteries, including major historical advances, related technical hurdles, and component/material developments. Furthermore, it also focused on the latest emergence of cell configurations that might promise to make a leap of the research of Li-S secondary batteries. In addition to it, the advanced characterization technologies have also been introduced to better understand the chemistry-related mechanisms of Li-S secondary batteries.
The Strong Points in this report are as follows: