Lithium-ion battery comprising an ion-selective conducting layer

摘要

A lithium-ion battery comprises a positive electrode, a negative electrode, an electrolyte system and an ion-selective conducting layer disposed between the positive electrode and the negative electrode. The ion-selective conducting layer consists of high polymers and an inorganic lithium salt having lithium-ion conductivity, or consists of the inorganic lithium salt. The inorganic lithium salt includes LimMnOx, wherein the values of the m and n ensure the LimMnOx an electrically neutral compound, M is selected from at least one of B, P, Si, Se, Zr, W, Ti, Te, Ta, Al and As. The lithium-ion battery has a conduction layer having preference-selective conductivity for the lithium ions and disposed between the positive electrode and the negative electrode. The selective-conduction layer has improved mobility for lithium ions. Metal ions generated from the oxidized metal current collector at the negative electrode due to the over-charging of the battery can be blocked.

主权项

1. A lithium-ion battery, comprising:
a positive electrode; a negative electrode; an electrolyte system; a separator disposed between the positive electrode and the negative electrode, the separator being a porous membrane; and an ion-selective conducting layer, disposed between the positive electrode and the negative electrode, the ion-selective conducting layer being attached to at least one side of the porous membrane of the separator, wherein the ion-selective conducting layer is consisted of high polymers and an inorganic lithium salt having a lithium-ion conductivity, or is consisted of the inorganic lithium salt having the lithium-ion conductivity, the inorganic lithium salt includes LimMnOx, the values of the m and n ensure the LimMnOx, an electrically neutral compound, the value of x is any positive value, and the M is selected from at least one of B, P, Si, Se, Zr, W, Ti, Te, Ta, Al and As, and the ion-selective conducting layer has a preference-selective conductivity for lithium ions and has a barrier effect for metal ions resulting from over-discharge to the negative electrode, wherein a surface of the ion-selective conducting layer is rendered rough, and an opposite surface thereto is smooth and dense.