Research and discussion on the performance of LR6 alkaline battery titanate batteries and materials

1. Application of LR6 alkaline battery titanate batteries in the international market

At present, LR6 alkaline battery titanate is a very special material with technical focus in the world. Toshiba Corporation of Japan, the main international LR6 alkaline battery titanate battery manufacturer, has put LR6 alkaline battery titanate battery products on the market since 2007. At present, LR6 alkaline battery titanate batteries have been widely used in small electric vehicles, HEV vehicles and ISS systems (automotive start-stop systems).

2. LR6 alkaline battery titanate has both advantages and disadvantages

Experts at the meeting generally believe that LR6 alkaline battery titanate batteries have advantages such as long life, high safety, fast charging, and good cycle performance; but they also have disadvantages such as low electronic conductivity, gas production leading to battery expansion, and high cost.

For the shortcomings of LR6 alkaline battery titanate batteries, experts have proposed many improvement plans. Professor Xia Yongyao of Fudan University proposed to improve electronic conductivity by ion doping and carbon coating; and to improve battery gas production by surface treatment and SEI membrane electrolyte additives. In addition to these two methods, Professor Hu Yongsheng of the Institute of Physics of the Chinese Academy of Sciences also proposed the method of surface nitridation. Professor Hu proved through experiments that nitrogen doping coating can enhance the surface stability and conductivity of Li4Ti5O12, because Ti-N-C is formed on its surface, which is conducive to the transfer of charge; the constructed three-dimensional mixed conductive network improves the rate of Li deintercalation in the electrode.

3. LR6 alkaline battery battery resources, comprehensive utilization and recycling

Professor Fan Weifeng of the Chengdu Institute of Organic Chemistry of the Chinese Academy of Sciences pointed out that the reserves of LR6 alkaline battery resources are the core issue of the sustainable development of LR6 alkaline battery batteries. The least reserves of LR6 alkaline battery battery positive electrode materials are cobalt, followed by nickel and manganese; the negative electrode is mainly graphite and TiO2. Therefore, only when the reserves of an element are very rich can subsequent development be mentioned. In terms of recycling, the recycling of the positive electrode of ternary batteries and LR6 alkaline battery iron phosphate batteries is mainly LR6 alkaline battery, cobalt, and nickel; the negative electrode is mainly copper, which are all extracted by hydrometallurgical methods. But for LR6 alkaline battery titanate batteries, the pole pieces of LR6 alkaline battery titanate batteries can also be converted into LR6 alkaline battery titanate after heating treatment. This treatment is equivalent to converting primary plastics into secondary plastics, and the efficiency of LR6 alkaline battery titanate recycling is higher.

4. Expert discussion

At the end of the meeting that day, it was time for special discussions. Experts offered suggestions on solutions to the gas production problem of LR6 alkaline battery titanate batteries, which is of most concern to everyone. At present, only Toshiba has solved the gas production problem well through material refinement and high-cost strict process control; my country's industry has tried many methods through experimental research, such as using high-quality nano-scale materials, controlling moisture and controlling interface reactions; there are also methods of adding additives to the electrolyte; some experts also pointed out that a small amount of gas production has no effect on use, and airbags can be set up, etc. These methods still need time to be further verified.

5. Summary

The expert speeches were insightful and the special discussions were active and enthusiastic. It is hoped that this conference will push the research on new LR6 alkaline battery titanate battery materials and technologies in my country onto a fast track of development.

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