From academic to industrial, what is the development history of lithium ternary materials?

1. Academic progress in ternary materials

In the face of the instability of nickel-rich ternary materials, the research team of Professor Kyeongiae Cho from the University of Texas at Dallas has obtained new research results on this issue. They calculated the first principle calculation combined with the effective interaction of the transition metal and established a new chemical bond model, explaining the reason for the instability of nickel-rich NCM.

The research team of Professor Roberto C. Longo and Kyeongjae Cho of the University of Texas at Dallas used LiNiCoMn quaternary phase diagram to study the capacity of NCM materials, and clarified the order of transition metal structure and the composite material of LiNi1?y?xCoyMnxO2 The effect of electrochemical properties of the material. Their experiments have shown that controlling the arrangement of transition metals at the atomic scale can increase the mobility of ions and electrons, thereby maximizing the rate performance and cycle stability during cycling.

While pursuing high-capacity cathode materials, we must also consider the electrolyte matching problem of high-voltage batteries. Argonne National Laboratory studied triethylphosphoric acid in nickel-rich LiNi0.5Co0.2Mn0.3O2 (NCM523) cathode materials. (TEP) and tris(2,2,2-trifluoroethyl)phosphoric acid (TTFP) as electrolyte additives, and concluded that the electrochemical performance of the battery is improved when the electrolyte contains 1wt% TTFP. .

2. Dynamics of the lithium battery industry on ternary materials

Policy cold snap

The electric car from Tesla, which is from the United States, is at the forefront of the world. The safety of the Panasonic NCR186503100mAh battery used in this electric vehicle is controversial. The results of a investigation into the death of a Tesla car accident in Indiana last November were announced. According to US media reports, the Indianapolisspecial announced that the main cause of the accident was a fire after the accident. China's Ministry of Industry and Information Technology also said in January last year that it would suspend the ternary lithium battery bus into the new energy catalog. The development prospects of ternary materials seem to be somewhat severe, but this does not stop its development momentum.

Ling Han’s ternary material

Hu Linlin, an analyst at the Institute of Advanced Research Institute of Lithium and Electricity (GGII), said that subsidies have gradually declined with the increase of battery power. When most companies choose 30Kwh power and high subsidy standards, they still have to meet the requirements of long-term customer mileage. Enterprises use ternary batteries.

Strong investment by giant companies

In an interview with Limeco's GEM, the company will also accelerate its pace in the development and production of ternary materials to seize the commanding heights. In terms of national policies and raw material prices, ternary materials may be favored in a new round of revenue. The new energy vehicle new policy introduced at the end of 2016 clearly links the subsidy quota to the battery energy density the higher the energy density, the more subsidies. The theoretical energy density of ternary batteries is higher. Many lithium power giants, such as BYD, Ningde Times, Guoxuan Hi-Tech, and AVIC Lithium, will switch to ternary lithium batteries.

A person in charge of the Ningde era revealed to the media that the company's lithium iron phosphate and ternary capacity accounted for about 2:1, and will gradually tend to 1:1 in the next two years. In January this year, the Ningde era "new generation lithium ion power battery industrialization technology development" project was launched in Ningde. The project developed a lithium-ion battery with high nickel ternary material as positive electrode and silicon carbon composite as negative electrode. The specific energy of lithium-ion battery is greatly increased from the current 150-180Wh/kg to more than 300Wh/kg, and the cost will be significantly reduced.

BYD's global lithium iron phosphate battery technology is leading the world, and now it is also deploying ternary lithium batteries on a large scale. According to BYD's secretary-general Li Wei, BYD expects battery capacity of 10GWH in 2016 and new ternary battery in 2017 -6GWH.

Guoxuan Hi-Tech has started the industrialization project of 10,000 tons of high-nickel ternary cathode materials, and the annual production of 1GWH ternary lithium battery production line of Guoxuan Hi-Tech Qingdao Company has also been officially put into production.

AVIC Lithium (Jiangsu) Co., Ltd. plans to start the second phase of the industrial park construction project. The total investment scale of the project is 437.34 million yuan, and a lithium-ion battery production line with an annual output of 5 billion watt-hours of ternary materials will be built.

Smart Energy has set aside a planned increase of 3.114 billion yuan to expand the production line of high-end ternary lithium batteries. In June 2016, the Bangpu Group invested 1.226 billion yuan to establish a ternary precursor project, with an estimated annual output of 35,000 tons of ternary precursors.

The page contains the contents of the machine translation.