Kunlun New Materials releases many blockbuster new technologies such as solid electrolyte and high silicon system electrolyte

As one of the fastest-growing leading electrolyte manufacturers in recent years, Kunlun New Materials has been deeply involved in the fields of electrolytes and power batteries for 20 years. It has established an excellent, comprehensive and efficient R&D team, and has made great achievements in various fields of electrolytes. An in-depth layout has been carried out, and the so-called "big" development will come naturally. Recently, the company has successively announced a number of blockbuster new technologies in the fields of solid-state batteries, ultra-fast charging, high energy density, high safety and silicon anode batteries.

Relying on its technological research and development accumulation in the field of electrolytes, Kunlun New Materials has grasped the trend of the new energy lithium battery materials industry and successively developed new electrolyte products, fully demonstrating the company's rich technical reserves and strong scientific research strength.

01

solid state battery

Launched “Super-trolyte” series of solid electrolyte solutions

Since the development of the lithium battery industry, although the concept of solid-state batteries has been popularized, there has been no major breakthrough at the industrial level.

Since 2023, many car companies have announced accelerating the deployment of solid-state batteries. It is expected that semi-solid-state battery-powered cars will mainly focus on 2024-2025. For anode materials such as metallic lithium that require higher energy density batteries and cathode materials that require higher voltage resistance, ordinary liquid electrolytes are difficult to be compatible, so the prospects for semi-solid batteries/quasi-solid batteries are broader in the short term.

In the long term, in order to further increase energy density, solid electrolytes need to be used to completely replace liquid electrolytes. The industrial development route of solid-state batteries is to transition from liquid electrolyte batteries to solid-liquid mixed electrolytes, and finally to all-solid electrolytes. Solid electrolytes can meet many conditions, including high ionic conductivity, wide electrochemical window, high lithium ion selectivity (i.e. high lithium ion mobility), excellent mechanical properties, etc.

As an electrolyte company with a long history, Kunlun New Materials has been cooperating with domestic and foreign research institutes since 2020 to develop related technologies required for solid-state batteries. The company is engaged in condensed electrolytes, oxide solid electrolytes, and sulfide solid electrolytes. We focus extensively on developing new technologies in the direction of electrolytes and polymer solid electrolytes to serve our customers.

In terms of patent layout, Kunlun New Materials has 5 invention patents in the direction of solid electrolytes and all-solid-state batteries, including 3 sulfide patents and 2 oxide patents. In addition, Kunlun New Materials has also laid out patents in the gel electrolyte direction; it has technical layout in the semi-solid/full solid/gel direction.

Solid Electrolytes - Super-trolytes - Sample Examples

Based on solid electrolytes, Kunlun New Materials has now achieved the production of laboratory-grade electrolyte membranes.

It is reported that Kunlun New Materials’ focus in the development of solid electrolytes will shift to solid electrolyte powder material doping improvement technology, solid electrolyte slurry technology and the mass production process of solid electrolyte membranes. Among them, the solid electrolyte (membrane/slurry) can be customized, and the thickness and conductivity of the electrolyte membrane can be customized. The thin film solid-state battery made of solid electrolyte membrane is shown in the figure below. Battery China has learned that in terms of solid electrolyte membranes, Kunlun New Materials has collaborated with some domestic/international partners to promote cooperation, and the relevant pilot and mass production schedules are determined based on market demand.

According to Kunlun New Materials, the company has sent samples of LATP, sulfide, and gel electrolytes that are currently mainstream in the market to major domestic and foreign customers and received positive feedback; the company's solid-state electrolyte slurry and other products have attracted mainstream solid-state battery customers and international automotive customers. enterprises’ strong willingness to cooperate.

In the rapid development of new materials, Kunlun New Materials closely investigates the industrial development trend, development direction and pace of solid-state batteries and solid-state electrolytes; cooperates with friends and customers, focusing on oxide solid electrolytes, sulfide solid electrolytes, In the technical direction of gel electrolytes, new technologies are integrated and developed to solve the stability problems of the interface between electrodes and electrolytes and the performance stability of electrolytes.

02

Laying out next-generation batteries

Major release of “Kun” series of products

Kunlun's new material technology team launches Kunlun's new "Kun" series of products (English: ROClyte).

At present, for high-energy systems, including large energy storage, large cylinders, high voltage, etc., while the energy density increases, the wettability becomes worse, resulting in many interface problems. Based on this demand, Kunlun New Materials Technology Team has developed a new additive Kun-ROClyte-N508. This product has greatly improved high and low temperature performance and cycle performance.

In addition to the new additive Kun-ROClyte-N508, this series of products also includes: "Kun-ROClyte-N507", a new solvent with excellent high-voltage resistance in sodium-ion battery electrolytes. Compared with conventional carbonate solvents, battery products using this solvent have better performance in charge and discharge rates, high and low temperature adaptability, cycle life and other aspects.

In terms of fast-charging electrolyte, Kunlun's R&D team proposed a composite lithium-ion electrolyte solution based on LiFSi and supplemented by the new additive "Kun-ROClyte-N863". Compared with other conventional electrolyte products, this solution has the advantages of high conductivity and lower viscosity. At the same time, it has superior high-temperature performance and can well adapt to the problem of battery temperature increase caused by high-rate charging.

In order to improve the safety of lithium batteries, Kunlun New Materials has also developed a new lithium battery thermal runaway solution - "Kun-ROClyte-GEL-A+B". This product adopts a two-injection method and uses process improvements to help battery products achieve the balance of "high energy density, high battery safety and excellent electrochemical performance".

Not only that, the R&D team of Kunlun New Materials has also laid out a variety of high-safety technical solutions for the liquid lithium-ion battery route: such as the new solvent "Kun-ROClyte-N11 + phosphorus-containing flame retardant FPN" and "Kun-ROClyte-HCL" electrolysis The former uses new solvents and additives to achieve flame retardancy, while the latter uses high-concentration lithium salt electrolyte/ionic liquid to ensure battery safety.

The above products can not only improve the safety of the battery, but also do not lose the electrochemical performance of the corresponding battery system. It provides reliable solution support for the iterative evolution of battery products in the future towards high nickel/silicon-based anodes, semi-solid condensed matter batteries, sodium-ion batteries and other technologies.

"Kun is so big that I don't know how many thousands of miles it is!" Obviously, Kunlun New Materials' launch of the above-mentioned new "Kun" series of products has a profound meaning.

03

Fast charging! High security! High silicon!

"Kunlun Express Shuttle", "Kunlun Andun" and "Kunlun High Silicon" help improve product performance

The R&D team of Kunlun New Materials (Huzhou) launched three new products: "Kunlun Quick Shuttle", "Kunlun Andun" and "Kunlun High Silicon".

This series of products mainly solves the problems faced by current new energy vehicles such as "high-rate fast charging", "high safety performance requirements" and "silicon-based anode development needs", which will help improve the performance of power battery products and bring better benefits to consumers. product experience.

Specifically, the "Kunlun Quick Shuttle" electrolyte adopts the three-in-one development idea of ​​"composite low-resistance electrolyte film-forming additive + low charge transfer resistance new electrolyte + low-viscosity solvent system", which is mainly used for fast charging and fast discharging and meets the requirements of Long cycle lithium iron phosphate battery products. After client application testing, it can meet the 5C charge and discharge/8000 cycle level, which better solves the problem of short cycle life of battery products under high-rate fast charging.

"Kunlun Andun" electrolyte uses a composite flame retardant. By forming a stable passivation interface on the interface, flame retardants of different volatilities are used and released successively to ensure the electrolyte's protection against free radicals when the battery is out of control. absorb. Mainly suitable for NCM622 and NCM811 systems. Through testing, this formula can effectively improve the safety of 6-series and 8-series ternary batteries, and related products can avoid fire or explosion in acupuncture tests.

"Kunlun High Silicon" series is suitable for high silicon systems. The new additives RNC020 and RNC515 can replace FEC's electrolyte fluorinated additives and can solve the high-temperature gas production problem caused by FEC in the silicon anode system, thereby helping to promote the application of high-silicon anodes and helping the energy density of power batteries to reach a higher level.