Wagner gets a present including a signed picture of him during the speech and leaves the stage to a huge applause. Now its time for a short break!

Na ion batteries will be more important in the future

Wagner thinks it will always be a balance of different batteries

Henning is asking if we will have settled on one battery technology in ten years.

Wagner thinks we have to increase capacity without compromising life-time

First question is from Kristine: What is more important, capacity or life-time?

Be critical is Nils Wagners take home message

Half-cell test might very well mask issues such as irreversible Li consumption

The industry has secrets that most people will never know

A Si electrode have about ten times the capacity of a graphite electrode, meaning the mass can be drastically reduced

Transition metal ortho silica batteries can be recharged many times, but have low performance

Nanoparticles can be covered by a carbon coating to be made conductive

Flame spray pyrolysis is an interesting combination of two preparation methods

Nanosilicone can be made quick and simple by flame pyrolysis

Many nano structures are interesting, but they will not be able to form a battery system in itself

Unfortunately, they also have low electronic and ionic conductivity

Orthosilicates is another group of polyanionic compound which is cheap to produce

LiFe(x)Mn(1-x)PO4 systems has nice properties

Nano olivines for batteries are not yet comercially produced, but Wagner believes it will be relatively easy and cheap to do

Using pyrolisis, on can make sure they do not exceed ~100nm in size

The particles needs to be between 50 and 100 nm

Nano olivines can be made by precipitation

Batteries with a polyanionic compound called LiFePO4 are commercially available and are very eco-friendly

However, polyanionic compounds are often poor electronic and ionic conductors

Polyanionic compounds are more stable than oxidic cathodes

Right now, Wagner is researching active coatings, which is also functionalized in addition to being protective

Protective nano coatings can be used to stabilize the surface of oxide based cathodes without adding a lot of dead weight

If one could replace cobolt with iron, batteries could be much cheaper

On the cathode side, we separate between oxides and poly anion cathodes

Small amounts of silicon are added to the anode blend because it has higher capacity than graphite

There are three different possible chemistries i the anode of a Li-ion battery

For high energy batteries nanotechnology can be used to reduce dead weight

Nanotechnology could help improving high current performance in high power batteries

A solide electrolyte interphase is very important - without this, Li-ion batteries would not work

Both on the positive and negative electrode, there are challenges

A Li-ion consists of a positive LiMO2-electrode and a negative graphitic electrode

Many researchers confuse cathode and anode - happy it was not just high-school me!

Li-ion batteries are outperforming all other battery technologies today

Nils Wagner is concerned about energy storage for a greener society.

The presentation is called Nanotechnology in Li-ion batteries: Possibilities and limitations