[anusinha]

I think the title is an oversimplification.

> To test this idea, they used slivers of wood from yellow pines. First, they coated these with carbon nanotubes, to improve their conductivity. Then they applied a film of tin to each sliver.

There's a lot more that is going on than just the wood.

[aray]

The Economist article title is "A pile of wood", and it actually discusses battery technology, so I think the title isn't bad.

[chiph]

Yep. Is it the cellulose (structure), or the lignin (electrolyte)? Or some combination?