US 9,755,271 B2Granted

Cell and preparation method thereof

AssigneeNingde Amperex Technology Limited

InventorsXiang Hong, Jiewei Zhang, Kaifu Zhong

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Abstract

The present disclosure provides a cell and a preparation method thereof. The cell comprises a positive electrode plate (1); a negative electrode plate (2) and a composite solid electrolyte membrane (3) positioned between the positive electrode plate (1) and the negative electrode plate (2). The composite solid electrolyte membrane (3) comprises inorganic solid electrolyte layers (31) and structure supporting layers (32) which are alternately laminated along a laminating direction (D), and has abutted surfaces (S1) respectively abutting against the positive electrode plate (1) and the negative electrode plate (2), an angle between the laminating direction (D) and the abutted surface (S1) is defined as α, and 0°≦α<90°. The composite solid electrolyte membrane not only plays an advantage of a high lithium ionic conductivity of the inorganic solid electrolyte, but also has an excellent mechanical processing property, thereby significantly improving electrochemical performance and safety performance of the cell.

Claims9

Dependent claims

A cell, comprising:

a positive electrode plate;
a negative electrode plate;
and
a composite solid electrolyte membrane positioned between the positive electrode plate and the negative electrode plate, comprising inorganic solid electrolyte layers and structure supporting layers which are alternately laminated along a laminating direction, and having two abutted surfaces respectively abutting against the positive electrode plate and the negative electrode plate, wherein
there is an angle between the laminating direction and the two abutted surfaces being defined as α, and 0°≦α<90°;
one of the two abutted surfaces abutting against the positive electrode plate is formed by sides of the inorganic solid electrolyte layers which face the positive electrode plate and sides of the structure supporting layers which face the positive electrode plate;
the other one of the two abutted surfaces abutting against the negative electrode plate is formed by sides of the inorganic solid electrolyte layers which face the negative electrode plate and sides of the structure supporting layers which face the negative electrode plate;
and
the laminating direction is extended from one side of the positive electrode plate and the negative electrode plate to the other side of the positive electrode plate and the negative electrode plate.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/728,607Filed 2 Jun 2015
Priority: CN 2014 1 02519169 Jun 2014
Published: US 2015/0357672 A110 Dec 2015
Granted: 5 Sep 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

H01M 10/056
Accumulators with non-aqueous electrolyte: characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
H01M 10/052
Accumulators with non-aqueous electrolyte: li-accumulators
H01M 10/0562
The electrolyte being constituted of inorganic materials only: solid materials
H01M 10/0565
The electrolyte being constituted of organic materials only: polymeric materials, e.g. gel-type or solid-type