Nanjing Nanda Instrument Co., Ltd. was invited to participate in the CMC 2022-2023 China Materials Conference. In this exhibition, Nanjing Nanda Instruments showcased our latest instruments and equipment and supporting materials. The company's expert team also conducted technical discussions and academic exchanges for the guests present, and shared our research results and application cases in scientific fields such as ball mills.

Participating in CMC 2022-2023 China Materials Conference is an important opportunity for Nanjing Nanda Instruments. We can have in-depth exchanges and cooperation with other enterprises, research institutions and academic experts in the industry. By participating in such exhibitions, Nanjing Nanda Instruments can not only improve its own technical level, but also expand its market influence and enhance brand awareness. During the exhibition, we actively communicate with customers, introduce our product functions and advantages in detail, and answer their doubts and needs. Through good interaction with customers, we have established a good cooperative relationship during the exhibition and successfully signed some cooperation intentions. Through this exhibition, our company has further expanded its market influence and established a good image of the company. And in this exhibition, we have obtained a large number of valuable market feedback and opinions, which will provide strong support for our future product innovation and product upgrading. To sum up, it is a successful experience for Nanjing Nanda Instruments to participate in the CMC2022-2023 China Materials Conference. Our company has demonstrated its strength in the scientific field by displaying products and on-site exchanges, and has obtained opportunities for cooperation and common development with peers.

　The use of ball mills in energy

　　high energy ball mill

High-energy ball mill is composed of feeding part, discharging part, rotating part, transmission part (reducer, small transmission gear, motor, electric control) and other main components. Ball mill can be regarded as a typical representative of crushing equipment in industrial production equipment. When many industries have certain requirements for the fineness and particle size of the powder, ball milling will always achieve good results. But did you know that the high-energy ball mill can also be used for the preparation of solid-state battery electrodes and solid-state electrolytes, and is expected to become a necessary process for the industrial production of solid-state batteries! Solid-state battery is a new thing, and the traditional liquid lithium battery is very different, the technical route is also very different. The market for industries related to solid-state batteries is huge, such as new energy, mobile phones, and electric vehicles. Will the high-energy ball mill develop rapidly on the fast train of solid-state batteries? How is the high-energy ball mill used to prepare solid-state battery electrodes and solid-state electrolytes, and what is its technical route? Next, we will fully understand the relationship between high-energy ball mills and solid-state batteries.

What is high energy ball milling?

Traditionally, the synthesis of new substances is achieved through chemical reactions, but the results of basic theory show that the chemical synthesis process is actually caused by energy conversion, so high-energy mechanical ball milling is gradually becoming an important way to prepare new substances. The basic principles of high-energy mechanical ball milling are similar to those of chemical synthesis. It promotes the occurrence of chemical reactions through the conversion of mechanical energy, thereby inducing changes in the structure and performance of substances. Generally called mechanical chemical method. Different from the traditional liquid battery, the interface contact in the solid battery is solid-solid contact, and the limited active site on the solid interface greatly limits the ion transmission on the interface, resulting in a large interface impedance. Therefore, the establishment of good interfacial contact is an effective way to improve the electrochemical performance of all-solid-state batteries. In order to solve this problem, many researchers have made corresponding research on electrode materials. In the study, it is found that among the many preparation methods, the high-energy ball milling method can achieve excellent results, and its convenience and efficiency are outstanding in the preparation method. For cathode materials: Gaona et al. studied the effect of reducing the particle size of the Li2S active material on the cell electrochemistry. They reduced the size of the Li2S positive electrode by high-energy ball milling and found that reducing the particle size of the positive electrode material effectively improved the reversible performance and rate performance of the battery. In addition, they compared the effects of hand grinding and ball milling on electrochemical performance and found that ball milling can make the contact between particles closer, provide more active sites, and promote the transport of lithium ions. For anode materials: At present, carbon anode is the main anode material for industrial production of lithium-ion batteries. However, with the rapid development of the electric vehicle industry, carbon anode materials have obviously been unable to meet the needs of lithium-ion power batteries. Lithium oxide is a hot spot in the research of battery anode materials. The preparation methods of spinel Li4Ti5O12 mainly include solid phase reaction method and sol-gel method. In view of industrialization, the solid phase reaction method is most likely to be used. Liu studied a method for preparing lithium titanium oxide by high-energy ball milling, including wet pre-ball milling, high-energy ball milling to prepare precursors, and high-temperature synthesis of Li4Ti5O12. For the preparation of solid electrolytes. In all-solid-state lithium-ion batteries, the solid electrolyte plays a key role, not only conducting lithium ions, but also acting as a separator, simplifying the process. In addition, the lithium ion conductivity of the solid electrolyte determines the performance of the all-solid-state battery. Therefore, in order to improve the electrochemical performance of the all-solid-state battery, that is, to increase the charge-discharge capacity and the number of cycles, it is necessary to prepare a solid electrolyte with high lithium ion conductivity. At present, there are three main routes for solid-state battery electrolyte research, namely oxide, sulfide and polymer electrolyte. Among them, sulfide electrolytes have developed rapidly and have broad prospects, and it is possible to achieve commercial production. Among the sulfide solid electrolytes, xLi2S-(100-x)P2S5 sulfide glass-ceramics is the most studied system. Mo Shanshan uses high-energy ball milling to prepare solid electrolyte 70Li2S-30P2S5, using the 8000D planetary ball mill of SPEX Company in the United States. The whole atmosphere was performed in Ar gas by ball milling Li2S and P2S5 powders. After 60 hours, 70Li2S-30P2S5 was successfully prepared.

　The ball mill of Nanda Instrument

Nanjing Nanda series planetary ball mill is a necessary device for mixing, fine grinding, small sample preparation, new product development and small batch production of high-tech materials. The product is small in size, full-featured, high efficiency, low noise, is a scientific research unit, institutions of higher learning, enterprise laboratory to obtain research samples (each experiment can be obtained at the same time four samples) ideal equipment, equipped with vacuum ball milling tank, can be in the vacuum state or inert gas protection state of the sample. Widely used in geology, minerals, metallurgy, electronics, building materials, ceramics, chemical industry, light industry, medicine, environmental protection and other departments. QM series planetary ball mill is equipped with four ball milling tanks on the turntable. When the turntable rotates, the central axis of the ball milling tank makes planetary motion, and the grinding balls in the tank grind and mix samples in high-speed motion. The product can be crushed and mixed with different particle size and different materials by dry and wet methods. The grinding product can have a particle size of up to 0.1 microns (I. e. 1.0X10-4mm).