диоксид марганца

The power sources of the lithium­-fluorinated carbon electrochemical system often fail to withstand forced discharges because of greater heat emission due to ohmic and polarizing losses, which leads to heating at the best, and to destruction of the element and failure of the equipment at the worst. Heat emission from the cells of the lithium manganese–dioxide system at forced discharges is 2–3 times less than from the similar cells of the lithium–fluorinated carbon system.

The review of cathode materials for lithium-ion batteries is presented, the analysis of advantages and application prospects of cathode materials on the basis of lithiated transition metals oxides is carried out. A method of heterovalent modification by ions of highly negative elements, lanthanum and its analogues for improving the electrochemical indices and stability of lithium manganese spinel is proposed. The effectiveness of fullerene, lithium fluoride, fullerenes halogen derivatives as modifying additive for MnO₂ cathode materials has been noticed.

DOI: https://doi.org/10.18500/1608-4039-2017-17-1-19-28

The influence of rare earth elements nature on Mn02 electrode electrochemical modification process in solutions of their salts in aprolic organic solvents was investigated. It was proved that periodicity of properties inherent in the lanthanides lakes place in the products of their interactions with MnO, and it is connected with characteristics of their structure. It was shown that the choice of metal as a modifying agent may be decisive in choosing the conditions of synthesis of cathode materials.