Publication

A new strategy of molecular overcharge protection shuttles for lithium ion batteries

Michael Graetzel, Shaik Mohammed Zakeeruddin
2008
Journal Articles

Abstract

The conventional strategy of overcharge protection for lithium ion batteries uses redox molecules having oxidation potential higher than the cathodic materials in the electrolyte. Here we propose a novel approach by using redox molecules having reduction potentials lower than the anodic materials. This new approach is successfully demonstrated in TiO2/LiCoO2 and TiO2/LiFePO4 cells by using benzophenone molecule. (C) 2007 Published by Elsevier B.V.

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https://infoscience.epfl.ch/entities/publication/879e6d06-8e65-40ef-bd83-3f1cebd24bd9

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Michael Graetzel, Shaik Mohammed Zakeeruddin
2008
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/879e6d06-8e65-40ef-bd83-3f1cebd24bd9

About this result

Related concepts (26)

Reduction potential

Redox potential (also known as oxidation / reduction potential, ORP, pe, , or ) is a measure of the tendency of a chemical species to acquire electrons from or lose electrons to an electrode and thereby be reduced or oxidised respectively. Redox potential is expressed in volts (V). Each species has its own intrinsic redox potential; for example, the more positive the reduction potential (reduction potential is more often used due to general formalism in electrochemistry), the greater the species' affinity for electrons and tendency to be reduced.

Lithium–sulfur battery

The lithium–sulfur battery (Li–S battery) is a type of rechargeable battery. It is notable for its high specific energy. The low atomic weight of lithium and moderate atomic weight of sulfur means that Li–S batteries are relatively light (about the density of water). They were used on the longest and highest-altitude unmanned solar-powered aeroplane flight (at the time) by Zephyr 6 in August 2008. Lithium–sulfur batteries may displace lithium-ion cells because of their higher energy density and reduced cost.

Lithium-ion battery

A lithium-ion or Li-ion battery is a type of rechargeable battery which uses the reversible reduction of lithium ions to store energy. The negative electrode of a conventional lithium-ion cell is typically graphite, a form of carbon. This negative electrode is sometimes called the anode as it acts as an anode during discharge. The positive electrode is typically a metal oxide; the positive electrode is sometimes called the cathode as it acts as a cathode during discharge.

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