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Patent
Oxis Energy | Date: 2014-03-21

A method for charging a lithium-sulphur cell, said method comprising: monitoring the voltage, V, of a cell during charge as a function of time, t, or capacity, Q, determining, in a voltage region in which the cell transitions between the first stage and second stage of charge, the reference capacity, Q


Patent
Oxis Energy | Date: 2014-03-21

A method for cycling a lithium-sulphur cell, said method comprising discharging a lithium-sulphur cell, terminating the discharge when the voltage of the cell reaches a threshold discharge voltage that is in the range of 1.5 to 2.1 V, charging the lithium-sulphur cell, and terminating the charge when the voltage of the cell reaches a threshold charge voltage that is in the range of 2.3 to 2.4V, wherein the lithium-sulphur cell is not fully charged at the threshold charge voltage, and wherein the lithium-sulphur cell is not fully discharged at the threshold discharge voltage.


Patent
Oxis Energy | Date: 2012-11-01

A metal foil electrode comprising i) a reinforcement layer formed from a porous substrate, and ii) first and second layers of metal foil formed comprising lithium and/or sodium, wherein the reinforcement layer is disposed between the first and second metal foil layers and bonded (preferably pressure bonded) together to form a composite structure having a thickness of 100 microns or less.


Grant
Agency: Cordis | Branch: H2020 | Program: RIA | Phase: COMPET-03-2015 | Award Amount: 999.95K | Year: 2015

For space missions, the energy density of batteries is a key factor of systems mass. A recent battery technology, based on this Lithium-Sulfur chemistry and developed by OXIS Energy, has shown promising results, particularly in terms of specific energy and cycling performances. Lithium-Sulfur batteries could become the next breakthrough technology for space batteries, with a factor of two on the specific energy compared to the current Lithium-Ion products. ECLIPSE ambition is to channel the research activities in Europe and, as a spinning-in effort, ensure that the harsh space constraints are taken into account for the further improvements of the Li-S technology. This research action aimed at developing Li-S technology for space applications focusing on three levels: - Cell level studies, including research to optimise the four main cells components: anode, cathode, separator and electrolyte to achieve 400Wh/kg cells compatible with space cycling profiles. - Battery and encapsulation level, including prototyping and theoretical studies. - System level studies for integration in satellite and launcher architectures, taking into account the economic constraints and the future technical challenges. The expected outcomes of ECLIPSE are: - Mass reduction of batteries by a factor two. - Costs reduction at all levels: subsystem, system and launching costs. - Maturation of the technology (TRL 5 expected at the end of the project). The main impacts of this research are related to competitiveness (lighter is cheaper), non-dependency and innovation: beyond current markets, this breakthrough can enable new challenging missions. The impact of the project is secured by the composition of the consortium led by Airbus Defence and Space with the main European actors of the Lithium-Sulfur electrochemistry and space batteries: ECLIPSE will contribute to the consolidation of an independent European industrial supply chain for Lithium-Sulfur batteries. Project duration is 24 months.


Grant
Agency: Cordis | Branch: H2020 | Program: RIA | Phase: NMP-17-2014 | Award Amount: 6.90M | Year: 2015

ALISE is a pan European collaboration focused on the development and commercial scale-up of new materials and on the understanding of the electrochemical processes involved in the lithium sulphur technology. It aims to create impact by developing innovative battery technology capable of fulfilling the expected and characteristics from European Automotive Industry needs, European Materials Roadmap, Social factors from vehicle consumers and future competitiveness trends and European Companies positioning. The project is focused to achieve 500 Wh/Kg stable LiS cell. The project involves dedicated durability, testing and LCA activities that will make sure the safety and adequate cyclability of battery being developed and available at competitive cost. Initial materials research will be scaled up during the project so that pilot scale quantities of the new materials will be introduced into the novel cell designs thus giving the following advancements over the current state of the art. The project approach will bring real breakthrough regarding new components, cell integration and architecture associated. New materials will be developed and optimized regarding anode, cathode, electrolyte and separator. Complete panels of specific tools and modelling associated will be developed from the unit cell to the batteries pack. Activities are focused on the elaboration of new materials and processes at TRL4. Demonstration of the lithium sulphur technology will be until batteries pack levels with validation onboard. Validation of prototype (17 kWh) with its driving range corresponding (100 km) will be done on circuit. ALISE is more than a linear bottom-up approach from materials to cell. ALISE shows strong resources to achieve a stable unit cell, with a supplementary top-down approach from the final application to the optimization of the unit cell.

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