ELECTRODE, ELECTRODE ELEMENT, AND NONAQUEOUS ELECTROLYTE POWER STORAGE DEVICE

Title:

ELECTRODE, ELECTRODE ELEMENT, AND NONAQUEOUS ELECTROLYTE POWER STORAGE DEVICE

Document Type and Number:

Japanese Patent JP2018147874

Kind Code:

A

Abstract:

PROBLEM TO BE SOLVED: To provide an electrode which enables the enhancement in performance of a power storage element using an electrolyte solution.SOLUTION: An electrode 10, 20 is arranged for a negative electrode 10 or positive electrode 20 of a power storage element 40. The electrode comprises an electrode current collector 11, 21, and a plurality of electrode material layers 12, 22 laminated on one side of the electrode current collector and capable of occluding and releasing lithium ions. When the electrode is for the negative electrode, each electrode material layer includes a first material and a second material less prone to cause the lithium ions to deposit on the surface of the negative electrode than the first material; the electrode material layer disposed farther from the electrode current collector becomes larger in the ratio of a weight of the second material to a total weight of the first and second materials. When the electrode is for the positive electrode, each electrode material layer includes a third material and a fourth material higher than the third material in lithium ion diffusibility; the electrode material layer disposed farther from the electrode current collector becomes smaller in the ratio of a weight of the fourth material to a total weight of the third and fourth materials.SELECTED DRAWING: Figure 1

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Inventors:

YANAGIDA HIDEO
TAKEUCHI SHIGEO
ZAMA YU
HIROWATARI ANNA
UTSUGI AYA
GOKOCHI TORU
KIMURA OKITOSHI

Application Number:

JP2017117777A

Publication Date:

September 20, 2018

Filing Date:

June 15, 2017

Export Citation:

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Assignee:

RICOH CO LTD

International Classes:

H01M4/13; H01G11/06; H01G11/26; H01G11/42; H01M2/26; H01M4/131; H01M4/133; H01M4/136; H01M4/36; H01M4/505; H01M4/525; H01M4/58; H01M4/587; H01M10/0525; H01M10/0566; H01M10/0585

Domestic Patent References:

JP2015524992A	2015-08-27
JP2015072753A	2015-04-16
JP2000348705A	2000-12-15
JP2016126832A	2016-07-11

Foreign References:

WO2012077176A1	2012-06-14
WO2016051639A1	2016-04-07

Attorney, Agent or Firm:

Tadashige Ito
Tadahiko Ito

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