US 12,230,761 B2
Power storage device and electronic device
Kazuhei Narita, Atsugi (JP); and Ryota Tajima, Isehara (JP)
Assigned to Semiconductor Energy Laboratory Co., Ltd., Atsugi (JP)
Filed by Semiconductor Energy Laboratory Co., Ltd., Atsugi (JP)
Filed on May 3, 2021, as Appl. No. 17/246,793.
Application 17/246,793 is a continuation of application No. 16/462,420, granted, now 11,038,207, previously published as PCT/IB2017/057316, filed on Nov. 22, 2017.
Claims priority of application No. 2016-234674 (JP), filed on Dec. 2, 2016.
Prior Publication US 2021/0257669 A1, Aug. 19, 2021
Int. Cl. H01M 10/0569 (2010.01); H01G 11/52 (2013.01); H01G 11/60 (2013.01); H01G 11/62 (2013.01); H01G 11/68 (2013.01); H01G 11/78 (2013.01); H01M 4/66 (2006.01); H01M 10/052 (2010.01); H01M 10/0568 (2010.01); H01M 50/136 (2021.01); H01M 50/178 (2021.01); H01M 50/429 (2021.01); H01M 50/44 (2021.01); H01M 50/55 (2021.01); H01M 50/557 (2021.01); H01M 50/119 (2021.01); H01M 50/121 (2021.01); H01M 50/129 (2021.01)
CPC H01M 10/0569 (2013.01) [H01G 11/52 (2013.01); H01G 11/60 (2013.01); H01G 11/62 (2013.01); H01G 11/68 (2013.01); H01G 11/78 (2013.01); H01M 4/661 (2013.01); H01M 4/662 (2013.01); H01M 10/052 (2013.01); H01M 10/0568 (2013.01); H01M 50/136 (2021.01); H01M 50/178 (2021.01); H01M 50/4295 (2021.01); H01M 50/44 (2021.01); H01M 50/55 (2021.01); H01M 50/557 (2021.01); H01M 50/119 (2021.01); H01M 50/121 (2021.01); H01M 50/129 (2021.01); H01M 2220/30 (2013.01); Y02E 60/13 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A power storage device comprising:
a positive electrode comprising a positive electrode current collector and a film over and in contact with the positive electrode current collector;
a negative electrode;
a first separator; and
an electrolyte,
wherein the positive electrode current collector includes aluminum,
wherein the film contains aluminum fluoride,
wherein the first separator is positioned between the positive electrode and the negative electrode,
wherein the electrolyte includes propylene carbonate, ethylene carbonate, vinylene carbonate, lithium hexafluorophosphate, and lithium salt expressed by General Formula (G1):

OG Complex Work Unit Chemistry
wherein, R1 and R2 independently represent fluorine or a straight-chain, branched-chain, or cyclic fluoroalkyl group having 1 to 10 carbon atoms, and
wherein a concentration of lithium hexafluorophosphate with respect to the electrolyte is more than or equal to 0.01 wt % and less than or equal to 1.9 wt % in a weight ratio.