公开(公告)号：US20250118769A1

公开(公告)日：2025-04-10

申请号：US18836340

申请日：2022-12-23

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： JUN NUNOME ,  SATOSHI FUJIYOSHI

IPC: H01M6/06 ,  H01M4/02 ,  H01M4/06 ,  H01M4/38 ,  H01M4/50 ,  H01M50/489

Abstract: An alkaline dry cell includes a cathode, an anode, a separator disposed between the cathode and anode, and an electrolyte held within the cathode, anode, and separator. The cathode includes manganese dioxide. A width at half maximum W of a (110)-plane diffraction peak in an X-ray diffraction pattern of the manganese dioxide is 2.4° or less. The anode includes powder of an anode active material including zinc. Particles s of the powder with particle diameters 75 μm or less account for 33% by mass or more of all particles of the powder. A thickness of the separator is 150 μm or more and is 210 μm or less.

公开(公告)号：US20250029981A1

公开(公告)日：2025-01-23

申请号：US18682629

申请日：2022-07-11

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： SATOSHI FUJIYOSHI ,  JUN NUNOME

IPC: H01M4/24 ,  H01M4/02 ,  H01M6/08

Abstract: An alkaline dry battery includes a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode. The positive electrode contains electrolyte and the negative electrode contains electrolyte. The positive electrode further contains electrolytic manganese dioxide, sodium, and zinc. The electrical potential of the electrolytic manganese dioxide is 300 mV or higher and 340 mV or lower with respect to that of a reference electrode made of mercury oxide. The content of the sodium in the positive electrode is 800 ppm by mass or more and 3000 ppm by mass or less. The content of the zinc in the positive electrode is 2400 ppm by mass or more and 4600 ppm by mass or less.