Studies have found that MOFs that separate water molecules can extend the lithium oxygen battery life ten times.

2022/04/08

  Author :Iflowpower – Portable Power Station Supplier

In determining the fierce global competition of the optimal battery chemical composition, the lithium oxygen battery has caused people's interest, because it is reported that it may provide 10 times more energy density than lithium ion equipment. However, the requirements for energy storage technology are still destroyed because unstable molecules are recombined into heterogeneous and unstable particles, resulting in degradation of equipment, resulting in poor circulation stability. Korean Science and Technology Advanced Research Institute (Kaist) Material Science and Engineering Department of Jeungkukang and other research teams to solve this problem.

Abstract Self-production and stable high-loading sub-nanometric particles in Multishell hollow organic frames and their utilization in lithium -O2 high performance cells, published in advanced science, researchers explain how they design Sub-Nanometric Particles (SNP) Atomic cluster size in the frame improves the stability under large mass load. Single nucleotide polymorphisms are only possible before the reunion stabilization of the back surface of the unsaturated surface bonds, and their collision frequencies can be controlled under low quality loads. The thermal solution of the organometallic compound results in a formation of a non-uniform phase SNP.

The researchers have shown that the outer casing is embedded in the multilayer MOF by alternating water-resistible and water-stabilized metal organic frame (MOFS), and then separate water molecules are screened by water stabilizing metal organic frame. Controllable hydrogen bond affinity makes the production of multi-shell hollow MOFs have higher stability and conductivity. Researchers say that the characteristics of MOF with up to 5 shells lead to their higher electrochemical properties, including high-capacity and low potential lithium -O2 batteries.

Kang said: "At the same time, the atomic-level electrocatalysts generated and stabilized in MOFS can be diversified according to a variety of combinations of metal and organic linkers, but it can not only expand the development of the electrocatalyst, but also expand various research areas, such as light. Catalyst, Medicine, Environment and Petrochemical. "Kaist team found that in battery applications, when MOFS is separated by water molecular treatment, they form dual core hydroxide with cobalt ion reaction.

It may also stabilize the cobalt hydroxide in the atomic level in the intra-horizontal moisture. This can reduce the over-potential of the battery by 63.9%, thereby extending the service life of the equipment.

According to the group analysis, due to its high energy density, the lithium oxygen device can bring real improvements to electric vehicle batteries, but further research can be pushed to the market.

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