The National Science Review reports the latest progress in the research

Recently, Professor Jiang Hao and Professor Li Chunzhong at the School of Materials Science and Engineering of East China University of Technology have once again achieved important research progress in improving the energy density and cycle life of high nickel positive material. The relevant research results are "Restraining Lattice Oxygen ESCAPES Superior Clicy Clicy Towards Ni-Rich Cathodes "was published in the National Science Review.

In the early stage of work, the team proposed the surface limit domain assistance deposition and high -temperature enhanced diffusion co -modification strategy. In situ, the high -nickel oxide positive electrode material aluminum ion gradient mixing and the fast ion conductor partial aluminum acid was evenly covered, which is clear The aluminum doped site, effectively stable crystal structure and electrode-electrolyte interface, circulating stability exceeded 1,000 times. It is assembled with commercial graphite to be assembled into 3.5AH single soft bags and 18650 cylindrical batteries. It has passed the national power battery innovation Heating and squeezing of the center testing center (Nature Common. 2021, 12: 4564). In order to further solve problems such as crystal grid charging and oxidation precipitation under the high -working voltage, the team researchers developed a new strategy of heterogeneous elements and inducing a granules to growth and directional arrangement into prefaced high -nickel positive poles. Fundamentally solve the problem of instability of the secondary particle structure; on this basis, the use of oxidatively reversible oxygen specialties can effectively inhibit oxygen loss and increase the working voltage to 4.5V. Researchers through advanced theory and representation methods such as first -principle calculation, finite element simulation, original X -ray diffraction, original micro -division electrochemical mass spectrum, and synchronous radiation X -ray absorption spectrum, etc. Detailed representation and sorting. The comparison capacity of high-nickel positive materials made is as high as 231.3 MAH G-1, and the first Kuron efficiency is 93.5%. The full battery composed of commercial graphite negative electrode is circulated in the width voltage range of 2.7-4.5 V Only 9.1%(natl. SCI. Rev. Doi: 10.1093/NSR/NWAC166).

The above -mentioned research work was mainly completed under the guidance of Professor Jiang Hao and Professor Li Chunzhong, a doctoral student at the School of Materials Science and Engineering of East China University of Technology. In addition, the research work has also received financial support of the National Natural Science Foundation of China, key projects of the National Natural Science Foundation of China, and the basic project of the Shanghai Municipal Science and Technology Commission.

- END -