1.5v Alkaline batteryis called "zero strain material", research and application of 1.5v Alkaline batteryanode material for lithium batteries

　　1.5v Alkaline batteryis called "zero strain material", and the research and application of 1.5v Alkaline batteryas anode material for lithium batteries. In the current lithium-ion battery industry, graphite anode materials still occupy the mainstream position of lithium battery anode materials. However, in recent years, the research and application of new anode materials have also begun to attract attention in the industry. New anode materials such as 1.5v Alkaline batteryare a very important direction. 1.5v Alkaline batteryhas some incomparable advantages over other anode materials. As an anode material for power lithium-ion batteries, it has great research value and commercial application potential.

　　1.5v Alkaline batteryis called "zero strain material", and the research and application of 1.5v Alkaline batteryas anode material for lithium batteries

　　The spinel structure of 1.5v Alkaline batteryhas a certain accommodation space for lithium ions. Generally speaking, one 1.5v Alkaline batterycan accommodate three lithium ions. The intercalation and deintercalation of lithium ions during charge and discharge has almost no impact on the structure of 1.5v Alkaline batterymaterials, because the crystal structure of 1.5v Alkaline batteryhas almost no change, and the a value only increases from 0.836nm to 0.837nm. This phenomenon is called "zero strain", so 1.5v Alkaline batteryis also called a "zero strain material."

　　This property plays an important role in electrode materials. It can avoid structural changes due to expansion and contraction of the material during charging and discharging, thereby improving the performance of the electrode and reducing the substantial attenuation of specific capacity, extending the use of lithium batteries. life.

　　Compared with graphite negative electrodes, 1.5v Alkaline batteryhas a higher lithium insertion potential, which can effectively avoid the precipitation of metallic lithium and the formation of lithium dendrites. 1.5v Alkaline batteryhas much higher thermodynamic stability than graphite and is less likely to cause thermal runaway of the battery, thus providing higher safety. In addition, 1.5v Alkaline batteryalso has excellent low-temperature performance, fast charging capability, and high cost performance, so it has good application prospects in large-scale energy storage and other fields.

　　The main factors limiting the large-scale application of 1.5v Alkaline batterycome from two aspects: materials and devices:

　　①The electronic and ionic conductivities of 1.5v Alkaline batteryare 10-13S.cm-1 and 10-9-10-13cm2.s-1 respectively. The energy gap for electrons to transition in 1.5v Alkaline batteryis about 2eV. The material is intrinsic The insulating properties greatly limit its rate performance under high current charge and discharge conditions.

　　② Lithium-ion batteries using 1.5v Alkaline batteryas the negative electrode commonly suffer from "flatulence" during the charge-discharge cycle and storage process, that is, gas is continuously generated inside the battery. Especially under high temperature conditions, the flatulence is more serious.

　　1.5v Alkaline batteryis currently recognized as one of the most promising anode materials for lithium-ion batteries. However, due to the low intrinsic electronic conductivity of the material, it is difficult to achieve high rate performance. In addition, 1.5v Alkaline batteryhas a strong relationship with the electrolyte. Interface side reactions are prone to occur between them, making lithium batteries using 1.5v Alkaline batteryas the negative electrode prone to gas problems, hindering the commercial application of lithium titanate.

　　With the continuous deepening of basic research on 1.5v Alkaline batteryanode, lithium-ion batteries using 1.5v Alkaline batteryas the anode have gradually begun to be put into practical use. 1.5v Alkaline batterymodified with carbon materials has better rate characteristics and surface chemical properties, coupled with its inherent low-temperature performance, ultra-high cycle life and safety, it will be used in hybrid vehicles, flexible electronic devices and The field of large-scale energy storage further expands its application.

　　In addition to the advantages in safety and lifespan, charging speed is also an important indicator in large-scale energy storage competition. Data shows that traditional lithium batteries with the same capacity need to be charged for 2-4 hours, while 1.5v Alkaline batterybatteries only need 6 minutes, which is considered to have strong peak shaving value. The high-rate performance of 1.5v Alkaline batterycan provide a 3C configuration system, providing users with a minimum-scale high-rate system to complete auxiliary services such as frequency modulation, and instantly provide large-rate input/output.

　　1.5v Alkaline batteryhas high stability and long life cycle, and its performance is significantly better than that of traditional lithium-ion batteries, giving it unique advantages in energy storage application scenarios. It is very suitable for large-scale energy storage and is called "the most applied one" in the industry. One of the promising energy storage batteries."

　　At present, the main problems of 1.5v Alkaline batteryare poor rate performance and insufficient energy density. However, 1.5v Alkaline batterybatteries have the advantage of fast charging. With the large-scale coverage of charging facilities, electric vehicles equipped with 1.5v Alkaline batterybatteries can be used anytime and anywhere. Charging, the energy density requirements for 1.5v Alkaline batterybatteries will be reduced. In the current booming environment of the new energy vehicle industry, promoting the further development and widespread application of 1.5v Alkaline batterypower lithium battery technology requires the efforts of all parties.

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