We report a new approach for the synthesis of three-dimensional nanoporous metals as binder-free current collectors for batteries. A versatile template-free method is presented which is based on the thermal treatment of metallic salts. The method involves thermal decomposition, hydrogen reduction of metallic precursors, and clusters nucleation and ligament growth. Topological disordered porous metal structures with controllable distribution of pore size and ligaments size ranging from tens nanometers to micrometers are controlled by varying the heating temperature and duration. The synthesis process has been scrutinized through XRD, SEM and TEM. The formation mechanism of nanoporous metals is qualitatively explained. As an application, the as-prepared nanoporous Ni is used as binder-free current collectors for nickel oxalates anodes. The newly designed electrodes with loading of nickel oxalates deliver excellent reversible capacities, good cycling performances and rate performances as anodes for lithium-ion batteries. It is anticipated that the synthesis method has versatility not only because it is suitable for different types of metallic salt precursors but also for synthesizing various metals and alloys such as Ni-Co alloys.
|Number of pages||1|
|Publication status||Published - 2018|
|Event||THERMEC’2018: International Conference on PROCESSING & MANUFACTURING OF ADVANCED MATERIALS Processing, Fabrication, Properties, Applications - Paris, France|
Duration: 9-Jul-2016 → 13-Jul-2018
|Period||09/07/2016 → 13/07/2018|