Mg-Li Hybrid Batteries: The Combination of Fast Kinetics and Reduced Overpotential

Abstract

It is imperative for the development of cost-effective and high-performance batteries. Currently, lithium-ion batteries still occupy most of the market. However, limited lithium (Li) resource and energy density retard their further development. The magnesium (Mg) metal has several significant advantages; those make it a viable alternative to Li as anode, including high volume specific capacity and dendrite-free plating during cycling and high abundance. The Mg-Li hybrid batteries can combine the advantages of Li ion and Mg metal to achieve fast electrode kinetics and smooth anode deposition morphology. This review summarizes recent progresses in cathode material design and anode interface modification for Mg-Li hybrid batteries. We aim to illustrate the contribution of Li+ to the electrochemical performance improvement at both cathode and anode sides and to provide inspiration for the future research in this field.

Assessing future technological impacts of patents based on the classification algorithms in machine learning: The case of electric vehicle domain

“…Compared to lithium, magnesium has some advantages, including low cost and high energy density. Thus, magnesium-lithium hybrid batteries are regarded as the most promising technologies in the EV battery domain [ 44 ]. The charging technologies include fast charging and charging connectors.…”

Insights into the Degradation Mechanism of the Magnesium Anode in Magnesium–Chalcogen Batteries: Revealing Principles for Anode Design with a 3D-Structured Magnesium Anode

“…After the dissolution of magnesium polysulfides/polyselenides (Mg-PSs) into the electrolyte, they may diffuse across the separator to the Mg anode, where they can be further reduced, leading to the acceleration of detrimental passivation on the Mg anode. As a result, Mg–S/Mg–Se systems have mostly reported short cycle lives, especially without a Li mediator or corrosive halogen compounds inside the electrolyte. − There are some pioneering works about electrolyte engineering , and cathode modification . However, to the best of our knowledge, there is a lack of studies on the dynamic evolution of the Mg metal anode during cycling and its correlation with the degradation or failure of Mg–S/Mg–Se batteries.…”

“…As a result, Mg−S/Mg−Se systems have mostly reported short cycle lives, especially without a Li mediator or corrosive halogen compounds inside the electrolyte. 23−30 There are some pioneering works about electrolyte engineering 31,32 and cathode modification. 33 However, to the best of our knowledge, there is a lack of studies on the dynamic evolution of the Mg metal anode during cycling and its correlation with the degradation or failure of Mg−S/Mg−Se batteries.…”

A bifunctional electrolyte for activating Mg–Li hybrid batteries

“…10 This knowledge has encouraged us to explore some of the underlying mechanisms by which lithiation acts as an "active dopant" for Mg 2+ cathodes, i.e., the intercalated Li + not only provides its intrinsic capacity but also allows for a possible enhancement of Mg 2+ storage in a Mg 2+ /Li + co-insertion process. 11,12 Similar to the pre-doping or wrapping approaches for cathodes, quite a few electrolytes were designed to modify Mg metal for fabricating stable anodes without a rapidly passivated surface. [13][14][15][16] A trade-off may still exist between the anode stability and nal gravimetric energy density of the batteries that is highly dependent on the electrolyte composition.…”