Lithium manganate battery lithium structure.solar battery for house

　　Limn2O4 is a typical ion crystal, which has two configurations: positive and reverse. XRD analysis knows that normal spinel Limn2O4 is a cube crystal with FD3M symmetrical, crystal cell constant A = 0.8245nm, and crystal cell volume v = 0.5609nm3. Oxygen ion is a tightly pile of facial cube (ABCABC…., Adjacent oxygen octopus is jointly connected), lithium occupies 1/8 oxygen four -faced gap (V4) position (li0.5mn2o4 structure, lithium is orderly arranged in an orderly arrangement: Lithium orderly occupies 1/16 oxygen four sides), and manganese occupy 1/2 oxygenal gap (V8) position. The unit lattice contains 56 atoms: 8 lithium atoms, 16 manganese atoms, and 32 oxygen atoms, of which MN3+and MN4+each account for 50%. Because the chip cell length of the spinel structure is twice the ordinary facial cubic structure (FCC) type (FCC) type, each crystal cells are actually composed of 8 cubic units. These eight cubic units can be divided into two types: A and B. Each two -coexisted cubic units belong to different types of structures, and each two -cube cells are similar to similar structures. Each small cubic unit has four oxygen ions, and they are located at the center of the diagonal point to the center, the center, is 1/4 and 3/4. Its structure can be briefly described as 8 tetraonal 8A positions occupied by lithium ion, 16 octopus positions (16D) occupied by manganese ions, manganese at 16D positions is MN3+and MN4+according to 1: 1 ratio. All vacancies, oxygen ions occupy the position of 32E of the octopus. In this structure, the MNO6 oxygen octopus is connected by common edges, forming a continuous three -dimensional cubic arrangement, that is, the [M2] O4 spinel structure network provides a lithium ion's diffusion The three -dimensional empty road formed by the facade lattice 16C. When the lithium ion spreads in this structure, the path of the 8A-16C-8A sequential path spreads straight line (the energy barrier in the 8A position of the four-sided body is lower than the energy barrier of the oxygen octopus 16C or 16D), and the angle of the diffusion path is 107 ° ° ° This is the theoretical basis for the use of secondary lithium -ion batteries.

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