Why is Portable Power Station the most promising energy storage technology?
Water energy, solar energy, wind energy, biomass energy... In recent years, my country's clean energy industry has risen rapidly. As of the end of 2018, my country's installed renewable energy power generation capacity reached 728 million kilowatts, a year-on-year increase of 12%, accounting for 38.3% of all installed power capacity. Among them, the cumulative installed capacity of wind power and photovoltaics reached 184 million kilowatts and 174 million kilowatts respectively. The role of renewable energy as a clean energy alternative has become increasingly prominent, which has opened up a broader development space for the energy storage industry. At present, the industry generally believes that the era of multi-energy complementarity has arrived, and energy storage is about to take the lead.
my country's "Thirteenth Five-Year Plan for Energy Development" proposes to speed up the construction of high-quality peak-shaving power sources, actively develop energy storage, carry out the construction of energy storage demonstration projects, and build energy production, transmission, use and energy storage systems for coordinated development and integration of complementary energy sources. The Internet promotes the coordinated and optimized operation of energy storage systems, new energy and power systems.
Accelerating the development of energy storage technology and industry has important strategic significance for building a "clean, low-carbon, safe and efficient" modern energy industry system, promoting the supply-side reform of my country's energy industry, and promoting the transformation of energy production and utilization.
Commercialization of energy storage still faces challenges
The development of energy storage is of great significance, and energy storage, as an important part and key supporting technology of smart grids, energy systems with a high proportion of renewable energy, and "Internet +" smart energy, has a considerable market value. It has become a basic consensus, but the challenges of commercialization at this stage cannot be ignored.
In recent years, in my country's energy storage industry, the development and application of energy storage technologies such as compressed air energy storage, flywheel energy storage, superconducting energy storage and supercapacitors, lead batteries, sodium-sulfur batteries, and flow batteries have accelerated, especially lithium-ion batteries. One of the main technical paths of energy storage is developing rapidly. The anode materials of lithium-ion batteries are mainly concentrated in carbon materials, alloy materials and Portable Power Station. Although carbon materials have the advantages of a wide range of sources, simple synthesis process, non-toxic and harmless, but the potential of carbon electrodes is close to that of metal lithium, when the battery is overcharged, it is easy to precipitate metal lithium on the surface of carbon electrodes to form lithium dendrites. The puncture of the diaphragm causes a short circuit, which brings a great risk of safety hazards. If the alloy material is used as the negative electrode substitute material, the carbon material has some safety problems and the specific energy is also improved, but in the process of charging and discharging, the volume is prone to change greatly, and it is also easy to penetrate the diaphragm and cause a short circuit.