The day before, a team of researchers report China Shenzhen Institute of advanced technology research institute said, a new type of aluminum - they developed graphite two yuan ion battery is environmentally friendly and low cost, can overcome the limitations of traditional lithium-ion batteries, has broad application prospects in the fields of electronic devices and electric vehicles.
Study on that novel electrode material aluminum graphite ion battery is two yuan aluminum and graphite with low cost and no pollution to the environment, the electrolyte lithium salt and solvent composition of traditional carbonate. Compared with the traditional lithium-ion battery, the weight, volume and material cost of the new battery are significantly reduced, but the energy density (ie, the energy contained in the unit volume) has improved a lot.
In recent years, due to the electronic products, electric cars and other industries driven by the global battery demand continues to rise. According to the American market research firm the Freedonia group data, the future global battery demand continues to grow at an annual rate of 7.7%, to 2019 the total market size will reach $120 billion.
Lithium ion battery is the most popular type of battery, because the electrode contains nickel, cobalt and other heavy metal elements. In addition, the development of lithium batteries are also faced with more than the power (ie, the output power of the battery and the ratio of the quality of the battery), energy density and other parameters are about to reach the limits of technical bottlenecks.
Led the study, researcher at the Chinese Academy of Sciences Shenzhen Institute of advanced technology Tang Yongbing said, compared with the traditional lithium battery, this battery product cost can be reduced by about 50%, 1.3 to 2 times higher than the traditional power to the lithium battery, the energy density can be increased to the traditional lithium battery 1.6 to 2.8 times, has obvious advantages.
Tang Yongbing said that the new type of aluminum - Graphite two - ion battery working mechanism is the "ion embedding" and "forming alloy" simultaneous occurrence of the process of two yuan. When charging, the anion in the electrolyte is embedded in the cathode made of graphite, and the lithium ion is deposited on the anode made of aluminum, and the aluminum lithium alloy is formed. The discharge process is the opposite. Because the aluminum electrode in the battery acts as the anode and the collector (the base metal which collects the current generated by the active material in the battery), the specific power and the energy density of the battery can be remarkably improved.
The researchers said that this new type of battery in electronic products, electric vehicles and other equipment has broad application prospects, into the commercial production will help improve the performance of these devices.