  Additive manufacturing and 3D printing in particular have the potential to
revolutionize existing fabrication processes where objects with complex
structures and shapes can be built with multifunctional material systems. For
electrochemical energy storage devices such as batteries and supercapacitors,
3D printing methods allows alternative form factors to be conceived based on
the end use application need in mind at the design stage. Additively
manufactured energy storage devices require active materials and composites
that are printable and this is influenced by performance requirements and the
basic electrochemistry. The interplay between electrochemical response,
stability, material type, object complexity and end use application are key to
realising 3D printing for electrochemical energy storage. Here, we summarise
recent advances and highlight the important role of methods, designs and
material selection for energy storage devices made by 3D printing, which is
general to the majority of methods in use currently.
