Comparison of the advantages and disadvantages of lithium batteries, flow batteries and lithium capacitors

1. Lithium batteries work by chemical reactions between the intercalation and deintercalation of lithium ions between the positive and negative electrodes. Therefore, they can be combined into a variety of positive and negative materials to achieve different purposes, such as high-power, large-capacity, High-temperature-resistant, long-life, and other lithium batteries with different outstanding performance, but at the same time, lithium batteries with excellent or multiple critical parameters require a revolution in new material technology. Power-type lithium batteries are currently more developed in the world in Europe, America, and East Asia, and lithium battery powerhouses include China, the United States, Japan and South Korea. 2. Lithium-ion capacitors are an improved variety of traditional electric double-layer capacitors. The negative electrode has the same principle as the lithium battery, and the positive electrode uses the electrostatic capacity that appears from the electric double-layer effect. In this way, lithium ion capacitors not only have the advantages of high power and long life of electric double layer capacitors, but also have the characteristics of high capacity of lithium batteries. The reason why lithium ion capacitors have higher energy density than electric double layer capacitors is due to the voltage and static electricity of the unit. Capacity is added. This effect is achieved in two ways: (1) The voltage of the capacitor is increased from 2.5V~3V to 4V from the traditional electric double layer capacitor by adding lithium ions. (2) The negative electrode can get lithium ions, so it is high. Compared with the original activated carbon of electric double layer capacitors, the capacity is increased by at least 1 times. 3. The redox flow battery uses a diaphragm to separate two ionic solutions, and the electrodes (positive and negative) set in the two solutions perform oxidation reactions separately as the solution starts to flow through the circulation of the liquid storage tank with a pump. Respond to reduction reaction. The energy density of flow batteries is relatively low compared to lithium batteries, but the output power (by adding unit stacks) and capacity (by adding vanadium solution tanks) can be easily increased. Therefore, regarding the high power and large capacity of large-scale power storage facilities Capacity requirements have special advantages, and therefore become one of the future energies driven by power vehicles. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.