Our research team has synthesized a single-layer graphene electrode that can deal with the problem of lithium dendrite growth

According to reports, a joint research team from the Academy of Military Sciences, Peking University and other units synthesized a perfect single-layer graphene electrode, and revealed the behavior of electrodeposition of lithium atoms using it as a base material, filling the metal lithium on the carbon atom lattice. The gap in basic research on heterogeneous nucleation provides a theoretical basis for solving problems such as lithium dendrites encountered in the industrialization of lithium-ion batteries. Related papers were recently published online in the journal Energystoragematerials. Lithium dendrites will grow in liquid lithium-ion batteries, pierce the diaphragm and cause short circuits in the battery. Zhang Hao, an associate researcher of the Academy of Military Sciences, a member of the research team, explained that in recent years, the method of using porous carbon-based materials to construct a metal lithium anode framework to inhibit the growth of lithium dendrites, but the law is disordered and the effect is limited. One of the reasons is that there is a gap in the basic research on the nucleation of metal lithium on the carbon lattice in the academic circle. To clarify how metal lithium is deposited on the carbon lattice, it is necessary to obtain a pure, background-free growth environment. To this end, the team of Professor Hailin Peng from Peking University combined the subject to form a perfect base surface of carbon atoms, using chemical vapor deposition to grow a single layer of graphene on copper foil. The first author of the paper and team member Meng Qianqian analyzed that single-layer graphene can be used to eliminate all the coupling factors caused by porous carbon to interfere with lithium deposition, and then achieve a clear understanding of the heterogeneous nucleation behavior of metallic lithium on the carbon lattice. Interpretation. On this basis, the research team conducted a series of basic theoretical explorations through ex-situ scanning electron microscopy and other methods, and found that compared with the traditional metal current collector (the component that collects current in the battery), the composition of lithium on the perfect carbon substrate The nucleus barrier is higher and it is more difficult to nucleate, so graphene is used to replace metal as a current collector or to inhibit crystal initiation. The team also observed that defects such as dislocations on the carbon lattice can promote the nucleation of lithium and secondary nucleation of lithium at the intersection of lithium dendrites. These results will help to understand the mechanism of lithium metal nucleation on the carbon atom lattice, lithium dendritic growth and other related mechanisms, and then lead to a more effective three-dimensional carbon skeleton metal lithium anode design strategy to deal with the problem of lithium dendritic growth. Technology Zone Our research team has synthesized a single-layer graphene electrode that can handle the growth of lithium dendrites and can easily balance two different types of power supplies. Current sharing controller design. Battery repair-battery overcharge repair Ningde Times announced a notice saying that only Obtained BMW’s intention to buy batteries, and does not push SurfaceConnect to USbType-C adapter on behalf of Microsoft, starting at $19.99