Surface Properties and Electrochemical Performance of Carbon Materials for Air Electrodes of Lithium-Air Batteries

Comparisons of heat treatment on the electrochemical performance of different carbons for lithium-oxygen cells

“…The increase of mesopores and surface area provides additional oxygen diffusion channels for improving oxygen transport as well as spaces for the electrode reaction and storing the solid discharge products on the cathode to enhance the ORR activities, in good agreement with other results [12,53]. Furthermore, heat treatment will also benefit the atomic arrangement to enhance electron flow, break a portion of the C-C bonds to cause carbon atoms dissociation and tube compartments breakage (even result in the creation of interlinks and the surface reconstruction [54]).…”

Critical aspects in the development of lithium–air batteries

“…In conclusion, the development of suitable structures for the oxygen electrode is one of the major challenges of lithium-oxygen batteries. Unfortunately, most works focused on structure development in lithium-oxygen batteries were done in organic carbonate electrolytes [77][78][79][80][81][82][83][84][85][86][87][88][89][90]. Now, it is clearly established that the reactions in these batteries are dominated by electrolyte decomposition.…”

Highly Ordered Mesoporous Carbon Support Materials for Air Electrode of Lithium Air Secondary Batteries

“…Carbon black particles, Ketjen-black EC600JD (KB) (surface area of 1270 m 2 /g; pore volume of 1.2 cm 3 /g), with nano-sized and unarranged shapes have been widely used as carbon support materials for air electrodes. 11,14 As a result, non-uniform and micrometer-order discharge product Li 2 O 2 forms on the air electrode, and it is not decomposed completely in the charge process because of the poor contact between carbon and Li 2 O 2 . Therefore, it is important to control the size of discharge product Li 2 O 2 and to uniformly deposit it on air electrode.…”

“…21, the specific surface area of CR is 919 m 2 /g in the case of pore size of 11 nm. Since CMK-3 and CR have properties similar to KB, which is conventionally used for LABs, 14 a cell incorporating CMK-3 or CR should show large capacity and better cycle performance because the shape of discharge product Li 2 O 2 can be regulated by controlling the pore structure. In addition, CMK-3 and CR are suitable materials to evaluate how pore size and shape on a carbon support affect the discharge and charge properties.…”