Abstract
A battery concept based on the chemical system of magnesium (anode) and persulfate (cathode) is presented. A complete procedure is given to prepare the battery for testing, although no experimental data is presented herein. The similarities of this system to a well-tested Li||LiFePO4 system lend strong credibility to the concept, and the estimated performance characteristics presented. The advantages of this design include the following many areas. First, inexpensive, and available, battery reagents exist. Second, by analogy to the lithium ion battery for which comparisons are made, the full fabrication process for battery separator design is known and efficient; and both the kJ/kg and Amps/kg values are estimated to be substantially larger than the lithium ion battery (e.g., Li||LiFePO4) experimental design. Finally, flammability of the Mg||MgS2O8 system can be expected to provide less of a potential flammability concern, compared to comparable lithium ion batteries. This is because lithium metal, as with any alkali metal, is aggressively flammable even under reduced moisture environments. The proposed magnesium persulfate battery calculated metrics yield an improvement of 194% greater output power (W/cm2·kg), and 154% greater stored energy (MJ/kg) than state-of-the-art lithium iron phosphate batteries.
Highlights
Rechargeable battery technology offers promise as a means to store energy for a wide variety of applications
How to cite this paper: Disselkamp, R.S. (2015) A New Rechargeable Battery Design Based on Magnesium and Persulfate
There does not exist a rechargeable battery concept that is suited to a broad range of energy storage capabilities such as these
Summary
Rechargeable battery technology offers promise as a means to store energy for a wide variety of applications. The reason for existing rechargeable design limitations are due to the high cost of materials, such as lithium and other expensive metals [1] and sophisticated fabrication methods [2]-[5] in order to circumvent the low specific energy storage values (kJ/kg), and unacceptable performance of battery output (e.g., electrical performance) as in low values of Amps/kg. Their Li-Mg alloy exhibited a low lithiation potential of 0.05 V (e.g., a desirable result), but a somewhat high delithiation potential of 0.24 V (an undesirable result) Aside from this reference to magnesium as an Li-Mg anode LIB alloy material, there were no other information found to the use of magnesium alone (e.g., pure metal) in reference to a rechargeable battery employing magnesium-persulfate system. These include: work by Lee et al [2] using cation-disordered oxides; a study by Mohanty et al [3] on Li-Mn-rich oxides illustrating a unique phase change; a study by Kennedy et al [4] employing nanowire LIB anodes demonstrating extended cycling more than 1000 times; and work by Li et al [5] that examined the Li-Ni-Co-Mn-O atomic layer deposition
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