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release time:2024-03-11 Hits: Popular:AG11 battery
Dr. Zhang Yuegang recommended the following three popular battery technologies, most of which are still in the laboratory research and development stage. Although there is still a long way to go before commercial production, we believe that the rapid development of mobile electronic devices will increase investment in the battery field, thereby accelerating technological and commercial breakthroughs to a certain extent.
The development of mobile phones, tablets, and various wearable devices is in full swing. However, batteries have become one of the bottlenecks restricting the development of all these mobile electronic devices. Most first-time smartphone users will be disappointed with the battery life - what used to last 4-7 days on the phone now requires charging every day.
Lithium-ion batteries are currently the most mainstream of secondary rechargeable batteries and are favored by investors and practitioners. However, in the long run, it is not very likely that its energy density will be doubled. From the perspective of smartphones, people spend more and more time online, the network speed is getting faster and faster, and the supporting chips must also be faster and faster; at the same time, the screen is getting larger and larger. Although there are various energy-saving improvements, the energy consumption is still very high. It is indeed increasing. According to Dr. Zhang Yuegang, an international expert in the battery field of the Chinese Academy of Sciences, it is now very unlikely that a rechargeable battery can be used for a week on a smartphone.
Energy density is one of the core indicators for testing battery quality. The goal of improvement is to store more and more energy in lighter and smaller battery packs. Take the lithium battery of BYD, a manufacturer we are familiar with, as an example. The actual specific energy that can be achieved according to weight and volume is 100-125 Wh/kg and 240-300 Wh/L respectively. It is used in Tesla electric car Model S The energy density of Panasonic laptop batteries is 170 Wh/kg. In our previous report, the American innovative power storage company (Enevate Corporation) can increase the battery energy density by more than 30% by improving the negative electrode materials of lithium-ion batteries.
If you want to double the energy density of batteries, you must rely on next-generation battery technology. Dr. Zhang Yuegang recommended to us the following three popular battery technologies, most of which are still in the laboratory research and development stage. Although there is still a long way to go before commercial production, we believe that the rapid development of mobile electronic devices will increase investment in the battery field, thereby accelerating technological and commercial breakthroughs to a certain extent.
Lithium-sulfur battery
Lithium-sulfur battery is a type of lithium battery. It is a lithium battery with sulfur element as the positive electrode and metallic lithium as the negative electrode. Its theoretical energy density is about 5 times that of lithium-ion batteries. It is still in the initial stage of research and development.
Lithium-sulfur batteries are a new generation of lithium batteries that are currently widely optimistic in addition to lithium batteries. Currently, laboratories and various early funds invested in research in this field are unanimously optimistic about the prospects for commercialization.
However, lithium-sulfur batteries also face great technical challenges. In particular, the battery negative electrode material uses chemically unstable lithium metal, which is a great test for the safety of the battery. In addition, there are still many unknown challenges in terms of stability, formula, process and many other aspects.
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