Air-metal secondary battery
AssigneeMurata Manufacturing Co., Ltd.
InventorsHironori Iida, Seiichiro Tabata, Shun Yamanoi, Shinichiro Yamada
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Abstract
An air-metal secondary battery has an electrode including a porous carbon material, wherein the porous carbon material has a specific surface area of 280 m2/g or more, preferably 700 m2/g or more, more preferably 1,500 m2/g or more, as determined by a nitrogen BET method, and the air-metal secondary battery has an average charging voltage of 4.4 V or less, preferably 4.3 V or less, more preferably 4.1 V or less.
Claims12
An air-metal secondary battery comprising a cathode composed of a porous carbon material, wherein the porous carbon material has a specific surface area greater than 1500 m2/g as determined by a nitrogen BET method and comprises an inverse opal-type porous carbon material, the air-metal secondary battery having an average charging voltage of 4.4 V or less, wherein the air-metal secondary battery has an average charging voltage Vch-ave in arange of aSBET+b to cSBET+d, whereinaSBET+b<Vch-ave<cSBET+d, wherein SBET is the specific surface area of the porous carbon material as determined by the nitrogen BET method, wherein a=−2×10−4(Vgm−2), c=−2×10−4 (Vgm−2), b=4.0 (V), and d=5.0 (V), wherein the porous carbon material has three-dimensional regularity, and the porous carbon material has pores arranged in a pattern forming a crystal structure macroscopically and has a pore distribution with a maximum in the range of 2 nm to 18 nm, and wherein the porous carbon material is derived from a plant and has a pore volume ranging from 0.5 cm3/g to 3.96 cm3/g as determined by a BHJ method.
Dependencies are inferred from the claim text.