Title:
ELECTROCHEMICAL DEVICE AND ELECTRONIC DEVICE COMPRISING SAME
Document Type and Number:
WIPO Patent Application WO/2021/134279
Kind Code:
A1
Abstract:
Disclosed are an electrochemical device and an electronic device comprising same. The electrochemical device comprises a positive electrode (30), a negative electrode (20) and a separator (10). The negative electrode (20) comprises a negative electrode active material, wherein the negative electrode active material comprises at least one of silicon, tin, germanium, antimony, bismuth and aluminum. The separator (10) comprises a porous substrate (101) and a coating layer (102), the coating layer (102) is located between the porous substrate (101) and the negative electrode (20), and the coating layer (102) comprises a polymer adhesive. The weight ratio of the polymer adhesive is 1% to 100% according to the total weight of the coating layer (102), and the ratio of the weight of the polymer adhesive in the coating layer (102) to the specific capacity of the negative electrode (20) corresponding thereto per unit area is 0.00013 mg/mAh to 0.00045 mg/mAh. The adhesive force is improved by controlling the ratio of the coating amount of the polymer adhesive to the specific capacity of the negative electrode (20) per unit area, such that cell deformation caused by the volume expansion of the negative electrode (20) during a charging and discharging process is effectively avoided.
More Like This:
Inventors:
WANG RUI (CN)
Application Number:
PCT/CN2019/130067
Publication Date:
July 08, 2021
Filing Date:
December 30, 2019
Export Citation:
Assignee:
NINGDE AMPEREX TECHNOLOGY LTD (CN)
International Classes:
H01M2/16
Foreign References:
| CN109244332A | 2019-01-18 | |||
| CN108832061A | 2018-11-16 | |||
| CN102610773A | 2012-07-25 | |||
| CN101916837A | 2010-12-15 | |||
| CN107611314A | 2018-01-19 | |||
| JP2016072142A | 2016-05-09 |
Other References:
See also references of EP 4071917A4
Attorney, Agent or Firm:
LEE AND LI - LEAVEN IPR AGENCY LTD. (CN)
Download PDF: