This might work, but the first wall of the blanket will need to be not only leak-proof and porous, but also sufficiently permeable to neutrons, which have to hit the lithium atoms beyond it.
To by mohlo fungovat, ale první stěna „peřiny“ bude muset být nejen neprodyšná a porézní, ale také dostatečně propustná pro neutrony, které musí bombardovat atomy lithia za ní.