According to the report of Science and Technology Daily, the importance of energy storage technologies has become increasingly prominent with the continuous expansion of renewable energy development and utilization and the rapid rise of the smart grid industry.
It is reported that the research team led by Professor Cui Wei of Stanford University in the United States introduced a manganese-hydrogen battery that can be recharged more than 10,000 times, and can achieve more than 10 years of stability. The results were published in "Natural Energy". It shows that the manganese hydrogen battery has very excellent electrochemical performance, and the battery is easily scaled up for large-scale energy storage.
According to the first author of the study, Dr. Chen Wei of the Stanford University School of Materials Science and Engineering introduced that the manganese hydrogen battery they invented uses a high surface area carbon as the positive current collector and a readily soluble manganese sulfate as the electrolyte. Hydrogen controlled by catalyst acts as a negative electrode. The battery is different from any previous water cell in terms of design, charge and discharge principle, test method and performance.
The results show that manganese hydrogen batteries have very good electrochemical performance, such as a stable discharge voltage of 1.3 volts, a high rate of discharge current 100 mA/cm2, a stable cycle of more than 10,000 cycles, and a high mass energy density of 139 Wh/kg and The volumetric energy density is 210Wh/L. Moreover, the battery is easily enlarged for large-scale energy storage.
Large-scale energy storage is the core technology for achieving the universal application of renewable energy. Existing large-scale energy storage technologies (such as pumped energy storage, compressed air energy storage) and various energy storage batteries (such as lithium-ion batteries, sodium-sulfur batteries, The flow batteries) all have different problems and are far from meeting the requirements for large-scale energy storage at low cost, safety, high energy density, and high stability. Cui Wei said: 'The invention of manganese hydrogen batteries will have a large-scale energy storage pattern. It will have an important impact and further alleviate the serious carbon emissions and air pollution brought about by traditional fossil fuels.
