Green synthesis of ultrathin WS 2 nanosheets for efficient hydrogen evolution reaction
The synthesis of ultrathin WS 2 nanosheets and HAADF-STEM image highlighting the defect areas (edge defects and S line vacancies).
Chemistry↗
Engineering topics
Seo, Ambrose (ORCID:0000000270555314)
Publications and source records attributed to Seo, Ambrose (ORCID:0000000270555314).
A Power-Law Decrease in Interfacial Resistance Between Li 7 La 3 Zr 2 O 12 and Lithium Metal After Removing Stack Pressure
The high interfacial resistance between solid electrolytes and lithium metal is a hurdle to developing all solid-state batteries. External pressure applied on the lithium and solid electrolyte interface prior to electrochemical cycling is known to effectively lower the interfacial resistance. Here we report that the interfacial resistance between Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO) and lithium metal decreases over time even after removing the external pressure. The irreversible decrease of interfacial resistance can be understood by a gradual reduction of the total energy of the system, including strain energy and interfacial energy. Under external pressure exceeding ~25 MPa, however, lithium can be squeezed into LLZTO, fracturing the ceramic solid electrolyte. As a result, these observations can help improve the understanding of lithium metal creep and the interactions between garnet-type solid electrolytes and lithium metal.
25 ENERGY STORAGE↗