Not a very good designer.
What a silly way of making a roll up solar battery. Any smart ‘designer’ would instead opt for a solid battery core with a flexible solar sheet around it. Aside from fatigue (and more to go wrong), it would also eliminate the need for: a soft battery, soft electrode and a magical ‘nano material’. Me? I’ll remain with my more convenient and financially superior solution of using relatively higher capacity cells and my single external charger (wall/solar powered or otherwise) to charge cell in situ. (surely I didn't have to be a real ‘inventor’ with numerous inventive patents in my name to realise that)