Title:
METHOD FOR PREDICTING LIFESPAN CHARACTERISTIC OF SECONDARY BATTERY INCLUDING CARBON-BASED HYBRID ANODE
Document Type and Number:
WIPO Patent Application WO/2021/091236
Kind Code:
A1
Abstract:
Provided is a method for predicting the lifespan characteristic of a secondary battery including a carbon-based hybrid anode, the method comprising the steps of: during charging and discharging of a target secondary battery including a target carbon-based hybrid anode including a carbon-based anode active material and a non-carbon-based anode active material, measuring the grid spacing (d-spacing) of the carbon-based anode active material of the target carbon-based hybrid anode by using an X-ray diffractometer to plot a graph showing changes in a grid spacing value relative to a charge/discharge capacity (X-axis); calculating a target slope difference, which is a difference in slope values that change at an inflection point of the graph in the plotted graph while a discharging proceeds; comparing the target slope difference with a reference slope difference which is a difference in slope values that change at an inflection point in the graph showing changes in a grid spacing value relative to a charge/discharge capacity (X-axis) of a reference secondary battery; and predicting, from the comparison result, whether the lifespan characteristic of the target secondary battery has been improved compared to the reference secondary battery.
Inventors:
YOON HYO-JUNG (KR)
KIM SO-YOUNG (KR)
SUNG KI-WON (KR)
LEE EUN-JU (KR)
KIM SO-YOUNG (KR)
SUNG KI-WON (KR)
LEE EUN-JU (KR)
Application Number:
PCT/KR2020/015352
Publication Date:
May 14, 2021
Filing Date:
November 04, 2020
Export Citation:
Assignee:
LG CHEMICAL LTD (KR)
International Classes:
H01M10/44; G01N23/20; G01R31/392; H01M4/36; H01M4/583; H01M10/052; H01M10/42
Foreign References:
| JP2017139089A | 2017-08-10 | |||
| KR20150057483A | 2015-05-28 | |||
| KR101463112B1 | 2014-11-21 | |||
| KR20190007966A | 2019-01-23 | |||
| KR101211327B1 | 2012-12-11 | |||
| KR20190139765A | 2019-12-18 |
Other References:
See also references of EP 4040568A4
Attorney, Agent or Firm:
PHIL & ONZI INT'L PATENT & LAW FIRM (KR)
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