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Various energy storage technologies and industry development trends of CR2032 button cell batteries
2.3 Lithium-ion CR2032 button cell batteries are still a hot topic in the current energy storage field
Electric vehicles have become an important factor in driving the development of lithium-ion battery technology. At present, for lithium CR2032 button cell batteries, the positive electrode materials lithium iron phosphate and nickel-cobalt-manganese ternary materials are the research focus, and the negative electrode materials nano-silicon and graphene are the research hotspots. There are more and more types of positive and negative electrode materials, and the application range is getting wider and wider. As the mainstream battery for electric vehicles, the energy density of lithium-ion CR2032 button cell batteries still needs to be improved. At present, the maximum energy density of electric vehicle CR2032 button cell batteries is about 170W·h/kg, and the cruising range can reach up to 400km. Household lithium battery energy storage systems have been commercialized.
2.4 Lithium-sulfur CR2032 button cell batteries are the high-energy density CR2032 button cell batteries that are currently closest to industrialization
Theoretically, the energy density of lithium-sulfur CR2032 button cell batteries exceeds 2700W·h/kg, and the actual energy density can reach 400-600W·h/kg. At present, the energy density of lithium-sulfur CR2032 button cell batteries that have reached commercial levels abroad has reached 300W·h/kg. my country has developed lithium-sulfur secondary CR2032 button cell batteries with energy density higher than 600W·h/kg, which is at the international advanced level. High energy density CR2032 button cell batteries such as lithium-air CR2032 button cell batteries, aluminum-air CR2032 button cell batteries, and magnesium CR2032 button cell batteries have become the current focus of research.
2.5 The scale of hydrogen fuel cell application is gradually expanding
Hydrogen fuel cells are still the mainstream direction of fuel cell development. The relevant technologies have basically met the requirements of industrialization, and are applied on a small scale to transportation tools such as trains, passenger cars, bicycles, forklifts, and small helicopters. The range of passenger cars reaches 500-700km, and the energy consumption of 100km is only equivalent to 3.3L gasoline. At present, the cost of hydrogen production by reforming fossil fuels in some countries is roughly equivalent to gasoline. Renewable energy hydrogen production, biohydrogen production, and land hydrogen transportation at normal temperature and pressure have become the focus of research.
2.6 The degree of attention paid to the heat storage market is gradually increasing
At present, heat storage technology is developing rapidly, and some thermal energy storage technologies are already very mature, especially sensible heat storage, but the market size is still small, mainly due to the high cost of thermal energy storage and the lack of sufficient attention paid by society to thermal energy storage. It is estimated that the heat storage system can save 30% to 40% of energy worldwide. The industry is studying the use of heat storage CR2032 button cell batteries to absorb heat in the car or capture solar heat, convert heat energy into electricity, heat and cool the car compartment, reduce the cost of electric vehicle CR2032 button cell batteries, and is expected to increase the car's range by more than 40%.
3 Energy storage industry and technology outlook
3.1 Rapid growth in solar and wind power generation installed capacity, and continued decline in power generation costs
Statistics of solar and wind power installed capacity in the past 20 years show that solar power installed capacity doubles every two years and wind power installed capacity doubles every four years. The global solar power installed capacity has increased from 5.1GW in 2005 to 227GW in 2015, and the wind power installed capacity has increased from 59GW in 2005 to 433GW in 2015. It is expected that the solar power installed capacity will reach 1500GW and 2400GW in 2025 and 2030 respectively, and the wind power installed capacity will reach 1200GW and 2000GW in the same period (Figure 3, Figure 4). As a key technology to support the grid connection of renewable energy, energy storage technology has huge market potential.
The price of crystalline silicon photovoltaic cells continues to decline, from $76 in 1977 to $0.3 in 2015. In the past five years, the cost of solar and wind power generation has dropped by 50% to 60%. At present, solar photovoltaic power generation and onshore wind power generation are already competitive in some countries. According to the current development trend, it is expected that wind power and photovoltaic power generation will become the cheapest power generation methods in many countries by 2025.
3.2 Household energy storage will show a rapid growth trend
In the past five years, household energy storage has developed rapidly in Germany, the United States, Australia, Japan and other countries. According to the latest data released by HIS and REN, the global household photovoltaic power generation battery energy storage installed capacity is expected to reach 1000MW in 2020. After 2020, energy storage systems will become an essential part of power production and operation, and the growth rate of industrial, commercial, and especially household energy storage will be significantly higher than grid energy storage. In 2025, the application of energy storage technology is expected to enter a large-scale development period.
3.3 Future of battery technology
Major breakthroughs are expected in 10 years. At present, the energy density of electric vehicle CR2032 button cell batteries ranges from 80 to 180 W·h/kg. Judging from the current progress of battery research and development, industrial investment, and related support policies, battery technology is expected to achieve major breakthroughs in the next 10 years, and the energy density is expected to reach 300 to 350 W·h/kg, so that the range of electric vehicles can reach 600 to 800 km (Figure 5).
3.4 Broad prospects for the electric vehicle market
The cost of electric vehicle CR2032 button cell batteries currently accounts for 1/3 to 1/2 of the total vehicle cost. The cost of lithium battery packs has dropped by 55% in the past five years and is expected to drop by another 40% by 2020. With the increase in the range brought about by the increase in the energy density of electric vehicle CR2032 button cell batteries and the continuous decline in costs, global electric vehicle sales are expected to rise exponentially.
4 Conclusion
At present, in the context of the global advocacy of vigorously developing clean energy, the development of energy storage technologies with higher energy density, longer cycle life, lower system cost, and better safety performance has become an important direction of research support plans in various countries. Driven by the rapid development of the renewable energy industry, the electric vehicle industry, and the energy Internet industry, the energy storage industry is expected to show explosive growth. The cost of storing renewable energy electricity will continue to decrease, and the performance and technical costs of energy storage systems will enter a new stage of virtuous cycle development. The current battery energy storage cost and energy density are still a long way from people's expectations. Judging from the current research results, battery technology is expected to usher in major breakthroughs and has broad market prospects. Breakthroughs in energy storage technology coupled with the acceleration of global energy transformation will bring tremendous pressure to the global oil and gas industry.
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