ELECTRODE MANUFACTURING METHOD AND POWER STORAGE DEVICE

• Main Authors: NAOI MASAYA, NUMATA ATSUSHI
• Format: Patent
• Language: English; Japanese
• Published: 26.01.2017
• Subjects: BASIC ELECTRIC ELEMENTS; CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

PROBLEM TO BE SOLVED: To provide an electrode manufacturing method and a power storage device that can suppress the amount of gas occurring when the power storage device is held under a charged state in spite of use of an active material having a small particle diameter.SOLUTION: A method of manufacturing an electrode constituting a power storage device contains a step of doping alkali metal into an active material having a 50% volume cumulative diameter D50 of 10 μm or less in electrolytic solution containing an alkali metal salt before the power storage device is assembled. For example, a carbon material may be listed up as the active material. It is preferable that the specific surface area of the active material is equal to 5 m/g or more. It is preferable that at least a part of the alkali metal salt is an alkali metal salt or lithium salt which contains a sulfonyl imide anion having a fluoro group.SELECTED DRAWING: None 【課題】粒子径が小さい活物質を用いた場合であっても、蓄電デバイスを充電状態で保持した際に発生するガスの量を抑制できる電極の製造方法、及び蓄電デバイスを提供すること。【解決手段】蓄電デバイスを構成する電極の製造方法であって、前記蓄電デバイスを組み立てる前に、アルカリ金属塩を含有する電解液中で、５０％体積累積径Ｄ５０が１０μｍ以下である活物質にアルカリ金属をドープする工程を含む電極の製造方法。上記活物質として、例えば炭素材料が挙げられる。上記活物質の比表面積が５ｍ２／ｇ以上であることが好ましい。上記アルカリ金属塩の少なくとも一部が、フルオロ基を有するスルホニルイミドアニオンを含むアルカリ金属塩、又はリチウム塩であることが好ましい。【選択図】なし