How to say about the power lithium battery technology improvement, listen to Wu Feng and other four academicians

　　Author ：Iflowpower – Portable Power Station Supplier

On December, the seventh scientific and technological innovation conference of Guoxuan High-Tech was held in Hefei. Battery technology routes, high-performance battery implementation pathways, etc., etc.

Academician Wu Feng: New Secondary Battery and Its Key Materials Research Progress my country Academician, Beijing University of Science and Technology Professor Wu Feng's application requirements are quantitative, so developing high-performance cleaning secondary batteries become people's consensus. With the continuous improvement of electric vehicle life, it is hoped that the pressure is also placed on the body of the dynamic lithium-ion battery at the same time, while seeing the importance of the dynamic lithium-ion battery, it is also considered some industrialization indicators. way.

In particular, as a battery energy density of key indicators, how to take into account safety, cycle, and magnification, etc. while the increase is energy, which must be focused on technological innovation and research and development. 973 Research Project has been three phases since 2002, and the project is originally completed in 2017.

It is expected to be extended to 2019. The project is important to study high-specific systems, starting from "light elements, multi-electronic response" materials, combined with polyionic effects, develop high-active electrode materials, and constructs high-specific secondary batteries; secondly, high energy density High power system, not only applicable to my country's electric drive cars, but also can be applied to the computer, so the R & D team hopes to achieve high energy and high power density of the battery through the regulation of multi-dimensional multi-scale electrode material interface functions. Once again, it is the safety technology, the R & D team starts from the primary step of adjusting and cutting the electrode reaction, increasing the safety of the cell battery, by exploring the safety boundary of the battery, improves the safety of the battery system, by the key preparation of the chemical, nice Upgrade of process and equipment, improve the safety of battery manufacturing and use; finally reduce the battery life, renewal, resource regeneration, resource regeneration, and resource-based regeneration, and resource-regeneration use of green recovery, resource regeneration, and resource regeneration, and resource regeneration, and resource regeneration, and resource regeneration use of green recovery, resource regeneration, and resource regeneration, and resource regeneration.

Use cost. In terms of high-proportional lithium-ion battery and related materials, it is necessary to improve the battery energy density. The material should be first step, develop a high-capacity material for new heterogeneous structures, as well as constructing and lithium material through spinel skin layers.

Dual improvement in the specific capacity and magnification after the nanocrystalline cover; the negative electrical waste is raw material in the industrial waste in the production process of the silicone industry, and the silicon nano ions and electrically conductive are achieved by conductive polymer. Flexible assembly. By proposing an academic thinking of battery energy, multi-electronic, multi-ion reactivity, breaking the performance of single electron reflection, opening up the research vision of the battery material, through multivariate synergies, realizing energy density Three steps.

By the 2020 waste battery will reach 1.70,000 tons, which makes the power lithium-ion battery to become an imminent task. The recovered battery positive material can also be regenerated.

In the past two years, the green high-efficiency recovery technique of natural succinic acid is developed. The study of the use of carbon adsorbents in the use of waste lithium-ion batteries, and the phosphorus adsorption amount is as high as 588μg / g, which is currently the highest. One of the carbon adsorbents, and the adsorbent after treatment of sewage can also be used as soil sustained release fertilizer, so it is very meaningful to explore the recovery of the power lithium-ion battery in these aspects.

Academician of the meeting: graphene in the electrochemical energy storage area of ​​my country Academy of Sciences, the Chinese Academy of Sciences has a very good performance, so graphene is considered to be very good in many fields. application. But to get a good application, the most important thing is to get high quality graphene in the case of low cost.

The preparation of graphene has five important methods, with chemical stripping and chemical vapor deposition methods to control the total amount, and cost can be saved. Due to the characteristics of two-dimensional structure, ultra-thin characteristics, high conductivity, high molecular performance, large specific surface area, easy function, stability, etc., can be obtained in batteries or other devices.

Its applications include active substances, conductive networks, catalysts, interface materials, matrix materials, and the like, are not limited to metal batteries such as lithium ion batteries, including energy storage devices that exceed capacitors or even flexibility. The following is some of the current research progress of graphene, which has not yet been applied to the application: first, in the lithium ion battery and supercapacitor. First, graphene can be used as a coating material of a metal agglomeration, and can also be used as a conductive additive.

In addition, graphite can be negative, can graphene? After the study, the graphene did have a high capacity, but the irreversible capacity is also very high, the application efficiency is very low, so it is difficult to use graphene to do negative poles. However, graphene is high-specific, rich in functional groups may also be used as another application, which is composite or hybrid with high-capacity materials. In the early stage, I thought it would be composite graphene and oxides to use graphene.

To inhibit agglomeration, volume changes, and stack of graphene, while graphene also forms a good flexible conductive network. Since graphene has many defects, the oxide is easily formed to form a uniform oxide particles above, thereby improving performance and capacity. Its structural form is also a variety of synthesis.

Second, graphene in the application of lithium sulfur batteries, the current research is very active. In the face of the problem of low content and low sulfur load, graphene can be used to improve the lithium sulfur battery, such as a limiting or chemical combination, or by inheriting the electrode structure. Third, the possible application of graphene in the energy storage.

Graphite is used in a variety of different energy storage devices, but also different uses, but current research finds that there is no possibility of charging a thousand kilometers of charging eight minutes. Academician of Sun Shigang: Structural design, performance regulation and interface process of lithium-ion battery electrode materials, academicians, my country Academy of Sciences, Xiamen University, Sun Shigang, fast-growing electric motor vehicle and scale energy storage put forward more and more demanding requirements, this A very critical factor is the catalyst of the fuel power lithium battery, which can charge the material of the battery. In terms of battery material structure, the lithium ions are patrol, one is a conversion, such as the current battery negative electrode material is a graphite, the capacity of commercial batteries is not enough, to be new material, such as metal oxide , Silicon, etc.

, the problems brought by these materials are once the volume is added, and these materials can be expanded. After the discharge is contracted, the volume will shrink, and any material will damage, which is a difficult point. If the body can be established in the design shape of the negative electrode material, there is a better performance, better cycle stability.

After the loop to 200 times, it will not fail, but will increase, this is different from usual materials. There are many kinds of positive electrode materials, to have a good capacity, multi-electron reaction, light, but in fact, the magnification of the positive electrode material is also important, because this is related to its lithium ion transmission, transmission channel, etc. When the surface reaction is, the channel is in a big, and it can be faster.

Open structure, lithium ions are easy to pass through this structure, from this sense, this is a great impact on the transmission of lithium ions. In addition to the positive electrode material and the negative electrode material, the lithium ion battery is also important. From the molecular horizontal and microscopic mechanisms to understand the interface structure evolution and reaction process, rational design, and regulatory electrochemical energy materials, which is significantly improved, which is especially important.

Academician of Zheng Mianping: The comprehensive utilization of future lithium resources, academicians of my country Academy of Engineering, Zheng Mianping, Director of the Yanhu Center of my country, China, my country, China, China, China, Qinghai, Tibet, Tibet 85%. There are several characteristics of my country's lithium resources: first, high concentration is relatively high; second, types, third, all of multi-component integrated deposit. Therefore, pay attention to comprehensive utilization.

Suggestions on my country's lithium resource development and utilization: The first is to further strengthen lithium resource investigation and research from the perspective of natural; the second is to increase the support of the lithium industry; the third is to further improve the process; fourth is Strengthen science and technology research and development, innovation driving resources processing technology and comprehensive utilization; the fifth is to join hands. .