US 12,266,827 B2
Lithium primary cell with a positive electrode including manganese dioxide and a boron compound
Keiko Kosuge, Osaka (JP); Fumio Kato, Osaka (JP); Toshiyuki Shimizu, Osaka (JP); and Yusuke Kawahara, Osaka (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 17/261,111
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Apr. 2, 2019, PCT No. PCT/JP2019/014568
§ 371(c)(1), (2) Date Jan. 18, 2021,
PCT Pub. No. WO2020/021775, PCT Pub. Date Jan. 30, 2020.
Claims priority of application No. 2018-137982 (JP), filed on Jul. 23, 2018.
Prior Publication US 2021/0320307 A1, Oct. 14, 2021
Int. Cl. H01M 6/16 (2006.01); H01M 4/06 (2006.01); H01M 4/131 (2010.01); H01M 4/134 (2010.01); H01M 4/36 (2006.01); H01M 4/40 (2006.01); H01M 4/505 (2010.01); H01M 50/107 (2021.01)
CPC H01M 6/16 (2013.01) [H01M 4/06 (2013.01); H01M 4/131 (2013.01); H01M 4/134 (2013.01); H01M 4/364 (2013.01); H01M 4/405 (2013.01); H01M 4/505 (2013.01); H01M 50/107 (2021.01); H01M 2300/0037 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A lithium primary cell comprising:
an electrode group including a positive electrode, a negative electrode, and a separator, the positive electrode and the negative electrode being wound with the separator interposed between the positive electrode and the negative electrode; and
a non-aqueous electrolytic solution,
wherein in the electrode group, an area the positive electrode and the negative electrode face each other is 250 cm2 or more and 350 cm2 or less,
the positive electrode includes a positive electrode mixture including manganese dioxide and a boron compound,
the negative electrode includes lithium metal or a lithium alloy,
the non-aqueous electrolytic solution includes ethylene carbonate,
a content of the boron compound in the positive electrode is 0.5 parts by mass or more and 2 parts by mass or less in terms of boron with respect to 100 parts by mass of the positive electrode mixture, and
a content of the ethylene carbonate in the non-aqueous electrolytic solution is 1 part by mass or more and 10 parts by mass or less with respect to 100 parts by mass of the manganese dioxide included in the positive electrode.