Title:
SECONDARY BATTERY AND ELECTRONIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/169113
Kind Code:
A1
Abstract:
The present application belongs to the technical field of batteries and discloses a secondary battery and an electronic device. The secondary battery comprises a positive electrode piece, and the positive electrode piece comprises a current collector and a positive electrode active material layer; the positive electrode active material layer comprises a positive electrode active material and a carbon material; the carbon material comprises carbon nanotube bundles having a length to diameter ratio of 2.5 to 100; and the carbon nanotube bundles comprise a plurality of first single carbon nanotubes. The carbon nanotube bundles in the present application can reduce an initial internal resistance of a battery, the soundness of a conductive network during cycling is ensured, internal resistance growth is effectively reduced, and charging speed is increased.
Inventors:
CHEN MEIFENG (CN)
Application Number:
PCT/CN2023/074533
Publication Date:
September 14, 2023
Filing Date:
February 06, 2023
Export Citation:
Assignee:
NINGDE AMPEREX TECHNOLOGY LTD (CN)
International Classes:
H01M4/62
Foreign References:
| CN114300686A | 2022-04-08 | |||
| CN113380978A | 2021-09-10 | |||
| JP2016048698A | 2016-04-07 | |||
| US20210047185A1 | 2021-02-18 | |||
| CN202210213883A | 2022-03-07 |
Attorney, Agent or Firm:
BEIJING HENGBO INTELLECTUAL PROPERTY AGENT LTD. et al. (CN)
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