Asahi Kasei Kabushiki Kaisha

Koichi Hiraoka

Kazuteru Umetsu

Yuima Kimura

Nobuhiro Okada

Yuichiro Hirakawa

Hitoshi Morita

Sumire Jinno

Yuji Asano

Ryosuke Baba

Taku Suetomi

Atsushi Hosokibara

Ryusuke Okoshi

An object of the present disclosure is to provide a doping method in which the status of the progress of a main reaction can be estimated in the lithium carbonate decomposition-type doping step of a nonaqueous lithium power storage element. The separation method, the doping method, and the doping apparatus according to the present disclosure include calculating a capacitor current density iand an electrode reaction current density ibased on voltage and current of a cell that are measured during doping of the cell.

Current separation method, doping method, and doping apparatus of nonaqueous lithium power storage element

Provided herein is a method for producing a non-aqueous alkali metal electricity storage element, comprising a voltage application step of applying a voltage to a non-aqueous alkali metal electricity storage element precursor comprising a positive electrode precursor, a negative electrode, a separator, and a non-aqueous electrolytic solution, housed in a casing, wherein a positive electrode active material layer of the positive electrode precursor comprises a positive electrode active material and an alkali metal compound other than the positive electrode active material.

Method for producing non-aqueous alkali metal electricity storage element

Provided is a nonaqueous lithium power storage element that can suppress excessive decomposition of a lithium compound remaining in a positive electrode, can suppress gas generation at high voltages, and can suppress capacity declines during high-load charge/discharge cycling. The nonaqueous lithium power storage element according to the present embodiment has a positive electrode that contains a lithium compound other than an active material, a negative electrode, a separator, and a lithium ion-containing nonaqueous electrolyte, wherein in the elemental map provided by SEM-EDX of the surface of the positive electrode, the area overlap ratio Uof the fluorine map relative to the oxygen map, as provided by binarization based on the average value of the brightness values, is 40% to 99%.

Nonaqueous lithium power storage element

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Tokyo, Japan

Koichi Hiraoka