Electrochemical Properties of Large-Discharge-Capacity Air Electrodes with Nickel Foam Sheet Support for Lithium Air Secondary Batteries

Abstract

Air electrodes with millimeter-order thickness for lithium air secondary batteries were prepared by loading electrode materials containing carbon and electrocatalyst into a single-layer nickel foam sheet or stacking three nickel-foam sheets loaded with the electrode materials. Discharge properties of the lithium air secondary battery cells incorporating these air electrodes were examined in 1 mol/l LiTFSA/TEGDME under a pure oxygen flow. The cell incorporating the air electrode with carbon loaded into the three-layer stack of nickel-foam sheets with total thickness of 3 mm showed a rather large discharge capacity of about 80 mAh/cm 2 compared to about 30 mAh/cm 2 for the cell with a carbon-only air electrode incorporating a single nickel-foam sheet with 3-mm thickness. The cell incorporating an air electrode loaded with Pt 10 Ru 90 electrocatalyst could be cycled under the condition of large cutoff capacities of 10 mAh/cm 2 at current density of 0.2 mA/cm 2 .

Rational Design of High‐Loading Electrodes with Superior Performances Toward Practical Application for Energy Storage Devices

“…3D Conductive Network Structure: Developing 3D conductive network structures enriched with pores to house active materials can effectively augment mass loading and improve electrochemical performance of electrodes. [110] Principal 3D conductive networks encompass carbon-based materials (graphene, [111][112][113][114][115] carbon cloth, [116,117] CNT, [73,118,119] conductive ceramic textile [29,120] ) aluminum foam and nickel foam, [121][122][123] among others. These networks offer a greater specific surface area and a reduced ion [132] Copyright 2017, Science.…”

Architecture Transformations of Ultrahigh Areal Capacity Air Cathodes for Lithium‐Oxygen Batteries

“…Therefore, both material composition and dimensional architecture constitution of the air cathode are critical in order to allow the battery reaction to proceed at desired rates and efficiency, especially at much increased carbon mass loadings. Only recently, a few reports have emerged (mostly since 2017) that have emphasized carbon mass loading and areal capacity of the air cathode in Li−O 2 batteries [8–20] …”

“…Only recently, a few reports have emerged (mostly since 2017) that have emphasized carbon mass loading and areal capacity of the air cathode in LiÀ O 2 batteries. [8][9][10][11][12][13][14][15][16][17][18][19][20] We recently developed a versatile, high carbon mass loading air cathode architectural platform based on dry-pressed holey graphene (hG). [9] The unique compressibility of hG, enabled by the presence of through-thickness holes on the graphene sheets, [21] allows the facile dry-press preparation of high performance air cathodes without the need of solvent or binder.…”