Title:
EVALUATION METHOD FOR SUBSTITUENT ELEMENT OF CATHODE ACTIVE MATERIAL FOR LITHIUM ION SECONDARY BATTERY
Document Type and Number:
Japanese Patent JP2020102301
Kind Code:
A
Abstract:
To provide an evaluation method for a substituent element of a cathode active material for lithium ion secondary battery capable of efficiently evaluating a degree of influence to be exerted upon a cycle characteristic in a case where a substituted cathode active material is used for a lithium ion secondary battery, regarding the substituent element of the cathode active material.SOLUTION: The present invention relates to an evaluation method for a substituent element of a cathode active material for lithium ion secondary battery including: a selection step of selecting a candidate element to partially substitute elements of a cathode active material having a layered structure, a calculation step of calculating a change of an inter-layer distance in a case where Li is inserted or desorbed between layers, in accordance with first principle calculation using a van der Waals density function, in the cathode active material of which the element is partially substituted by the candidate element; a repetition step of repeatedly implementing the selection step and the calculation step while changing the kind of the candidate element to be selected in the selection step; and an evaluation step of arraying the candidate elements used for the calculation step in an order from a candidate element with the least change of the inter-layer distance calculated in the calculated step, and evaluating that an effect of improving a cycle characteristic is high, in the order.SELECTED DRAWING: Figure 1
Inventors:
YOSHIDA TOMOHIRO
MAEZONO RYO
HONGO KENTA
MAEZONO RYO
HONGO KENTA
Application Number:
JP2018237675A
Publication Date:
July 02, 2020
Filing Date:
December 19, 2018
Export Citation:
Assignee:
SUMITOMO METAL MINING CO
JAPAN ADVANCED INSTITUTE OF SCIENCE & TECH HOKURIKU
JAPAN ADVANCED INSTITUTE OF SCIENCE & TECH HOKURIKU
International Classes:
H01M4/525; H01M4/505
Domestic Patent References:
| JP2016091633A | 2016-05-23 | |||
| JP2014216125A | 2014-11-17 | |||
| JP2013125594A | 2013-06-24 | |||
| JP2008147199A | 2008-06-26 | |||
| JP2017162790A | 2017-09-14 | |||
| JP2011040281A | 2011-02-24 |
Foreign References:
| WO2018164640A1 | 2018-09-13 |
Other References:
TSUTOMU OHZUKU ET AL.: "Electrochemistry and Structual Chemistry of LiNiO2(R3m) for 4 Volt Secondary Lithium Cells", JOURNAL OF THE ELECTROCHEMICAL SOCIETY, vol. 140, no. 7, JPN6022023939, July 1993 (1993-07-01), pages 1862 - 1870, ISSN: 0004798061
Attorney, Agent or Firm:
Tadashige Ito
Tadahiko Ito
Tadahiko Ito