Stretchable lithium-ion battery is based on new micro-honeycomb structure

Nanowerk  April 29, 2020
In stretchable batteries the electrodes must have a degree of stretchability because the active materials occupy most of the volume, and the separator and packaging should also be stretchable. Researchers in South Korea have developed an all-component stretchable lithium-ion battery by leveraging the structural stretchability of re-entrant micro-honeycomb graphene–carbon nanotube (CNT)/active material composite electrodes and a physically cross-linked gel electrolyte, without using an inactive elastomeric substrate or matrix. Active materials interconnected via the entangled CNT and graphene sheets provided a mechanically stable porous network framework consisting solely of binder-free, highly conductive materials which provided superior electron transfer, and the inwardly protruding framework in the re-entrant honeycomb structure allowed for structural stretching during deformation. The battery showed a high areal capacity, superior electrochemical performance, and long-term stability of after 100 cycles in air conditions…read more. TECHNICAL ARTICLE

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