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Volume 7 Biosensors Journal
ISSN: 2090-4967 Electrochemistry 2018
June 11-12, 2018
June 11-12, 2018 | Rome, Italy
4th International Conference on Electrochemistry
Moving beyond lithium-ion batteries
John Muldoon
Toyota Research Institute, USA
Without a doubt the Holy Grail of battery research is the development of a post lithium ion technology. This may require
a shift towards batteries containing a pure metal anode. Li metal is an attractive metal anode in part due to its high
volumetric capacity (2062 mAh cm-3), a high reductive potential of -3.0 V vs. normal hydrogen electrode (NHE) and the wide
availability of lithium electrolytes. However, its deposition occurs unevenly with formation of dendrites which leads to safety
concerns during cycling. In contrast to lithium metal, magnesium metal deposition is not plagued by dendritic formation.
However, magnesium has a reductive potential of -2.36 V vs. NHE and has a unique electrochemistry which prohibited the
use of magnesium analogues of lithium electrolytes. Since the oxidative stability of electrolytes governs the choice of cathodes
it is of paramount importance to develop non-corrosive magnesium electrolyte with wide electrochemical windows which will
permit discovery of high voltage cathodes. I will present the latest developments and future challenges whichmust be overcome.
Elemental sulfur is a very attractive cathode for the post Li ion battery since the sulfur has high theoretical capacity of 1672
mAh/g. Despite these attractive properties, practical application of Li-S battery is still unrealized due to some big challenges for
the sulfur cathode such as high resistance, low loading of active material and dissolution of the intermediate polysulfide into
the electrolyte during charge and discharge. These issues cause low columbic efficiency, fast capacity fade and self-discharge of
the Li-S battery. In order to suppress the dissolution of the intermediate polysulfides and minimize the addition of conductive
carbon; our group has created a controlled nano-architecture template in which sulfur nanoparticles encapsulated with the
conductive polyelectrolyte nanomembranes coated with nanocarbon. The findings of this work will be discussed.
Biosens J 2018, Volume 7
DOI: 10.4172/2090-4967-C1-003