Very high energy density silicide–air primary batteries

Abstract

High density electrochemical energy storage is of central importance for mobile power applications. The relatively low energy density and

A high-capacity dual-electrolyte aluminum/air electrochemical cell

“…Recently, silicon has emerged as a new anode candidate given its high theoretical capacity (3817 mA h g À1 and 8890 mA h cm À3 ) and energy density (8359 W h kg À1 and 19 469 W h L À1 ) (see Table S1 in ESI †). 15,16,[42][43][44] Silicon undergoes a similar reaction mechanism as aluminum and zinc in alkaline electrolytes. The DEAAC outperforms the reported high-capacity alkaline Si/air cell 15 in terms of energy density (both gravimetric and volumetric) and discharge current density (10-30 mA cm À2 vs. 0.01-0.1 mA cm À2 ); its volumetric capacity (5950 mA h cm À3 at 30 mA cm À2 ) is more than twice as high as that of the Si/air cell (2809 mA h cm À3 at 0.1 mA cm À2 ).…”

“…[12][13][14] Recently, Duan's group has broadened the classical metal/air concept to the metalloids and demonstrated high capacity silicon/air and alkaline silicide/air batteries. 15,16 Yet these cells exhibit low discharge current densities (#1 mA cm À2 ) at normal operation voltages due to the poor conductivity and reactivity of Si and silicide in alkaline. Moreover, these cells still have the anodic self-corrosion problem as in typical alkaline metal/air batteries.…”

Theoretical insight into highly durable iron phthalocyanine derived non-precious catalysts for oxygen reduction reactions

“…Accurate understanding of oxygen reduction reaction (ORR) mechanisms is vital for improving the efficiency of many devices, including metal-air batteries, [1][2][3][4][5] fuel generation devices 6,7 and fuel cells. [8][9][10][11][12][13][14] This issue is highly pertinent to proton exchange membrane (PEM) fuel cells, which are nonpolluting electrochemical power generation devices that convert the chemical energy of fuels into electricity, heat and water.…”

Recent developments in materials for aluminum–air batteries: A review

“…A c c e p t e d M a n u s c r i p t 15 deposition of impurities in the electrolyte on surface of the Pd. Other methods of depositing Pd onto Ag surfaces and the use of anion exchange membranes (AEMs) to isolate the OH -species could enhance the air cathode's performance [50].…”