Up until now, the use of the cathode LNMO (lithium-manganese-nickel oxide) has been discouraged for its poor stability at high voltage of the liquid and polymeric electrolytes. 3DACCESS will address this challenge through the development of a new solid-state device structured on 3D, stable until 5V, and which exhibits high conductivities at an electrolyte level.

The creation of stable conductor interfaces between the active material and the electrolyte, thanks to the 3D processing, will be the key to success in the optimization of the composition of the cathode. This way, the cover of the electrode’s material will be adapted with a shock-absorbing layer in order to protect the active material during the processing and during the cycling. In consequence, the dense 3D ceramic will be the key component of the final electrochemical device.

The structure of the porous-dense-porous complex will maximize the contact area on the sides of the electrode, thus increasing the device’s energy, and will avoid the formation of dendrites thanks to the intermediate dense layer, which will allow to maintain its security. At CIC energiGUNE a few strategies will be explored for the processing of the 3D structure, such as the cold synthesizing. Moreover, different combinations of covering materials and ceramic electrolytes will be tested in order to guarantee stable chemical and electrochemical interfaces.