Solving the Dendrite Problem with Precipitated Lithium Anodes
Ensuring all-solid-state battery life and safety at the same time
800 km driving range on a single charge, over 1,000 recharges


Samsung Electronics' Advanced Institute of Technology has published in the world-renowned academic journal 'Nature Energy' a source technology that can increase the lifespan and safety of the 'all-solid-state battery', which is attracting attention as a next-generation battery, while reducing its size by half.

On the 10th, Samsung Electronics Advanced Institute of Technology, together with Samsung Electronics Japan Research Institute, announced the results of a research on an all-solid-state battery that can drive 800 km on a single charge and be recharged over 1,000 times.

All-solid-state batteries replace the electrolyte between the battery's positive and negative electrodes from liquid to solid, enabling the implementation of larger-capacity batteries and higher safety compared to the currently used lithium-ion batteries.

Generally, lithium metal (Li metal) is used as the battery cathode material in all-solid-state batteries. However, lithium metal has a technical challenge of having to solve the problem of dendrites that reduce the lifespan and safety of solid-state batteries.

Dendrites are tree-shaped crystals that appear on the surface of the negative electrode as lithium moves from the positive electrode to the negative electrode when the battery is charged. These crystals damage the battery separator, reducing its lifespan and safety.

Samsung Electronics applied 'precipitation-type lithium cathode technology' that applies a 5 micrometer (㎛) thick silver-carbon nanoparticle composite layer (Ag-C Nanocomposite Layer) to the all-solid-state battery cathode to solve the dendrite problem.

This technology not only increases the safety and lifespan of all-solid-state batteries, but also makes it possible to increase energy density by making the battery cathode thinner than before, thereby reducing the size by half compared to lithium-ion batteries.

Samsung Electronics Advanced Institute of Technology Master Dong-min Lim said, “This research is a fundamental technology that will increase the driving range of electric vehicles,” and “We will overcome the limitations of next-generation batteries through research on all-solid-state battery materials and mass production technology.”