The Hong Kong University of Science and Technology

Guangzhou Hkust Fok Ying Tung Research Institute

Minhua Shao

Jin Li

Ping Gao

Qiao Gu

Lulu Zhang

Hsi-Wen Wu

Fei Xiao

Jiadong Li

Electrocatalysts and methods of forming the same are provided. A hybrid electrocatalyst can be a combination of a platinum (Pt)-based catalyst and a carbon-based non-precious-metal catalyst using a single atom approach. A fuel cell electrocatalyst can include a nitrogen-doped carbon support and a plurality of atoms of both Pt and of a non-precious-metal catalyst dispersed in the support. The dispersed atoms can be isolated from each other within the support.

Durable hybrid electrocatalysts for fuel cells

Provided is a post-treatment method and system for a core-shell catalyst, which relate to the field of fuel cell materials. The post-treatment method of the present disclosure includes the following steps: a core-shell catalyst is added into an electrolyte solution containing citric acid or ethylenediamine tetraacetic acid, a gas containing oxygen is introduced into the electrolyte solution followed by stirring for a predetermined reaction time, the open circuit potential of the reactor base is recorded during the reaction time, and the open circuit potential should stabilize at 0.90˜1.0 V vs. RHE when the reaction is completed. The molar ratio of citric acid or ethylenediamine tetraacetic acid to platinum of the core-shell catalyst is 10 to 1000:1. A percentage of oxygen in the gas is 10 to 100% by volume. The post-treatment method of the present disclosure can significantly improve the platinum mass activity and PGM mass activity and durability of core-shell catalyst.

Post-treatment methods and systems for core-shell catalysts

An all-solid-state battery system having a solid-state electrolyte composite is provided. The solid-state electrolyte composite includes a porous framework providing support and mechanical strength for the solid-state electrolyte composite and a plurality of ionic conductors filling voids of the porous framework for maximizing ionic conductance of the solid-state electrolyte composite. The porous framework may be made of ultra-high-molecular-weight polyethylene (UHMWPE) polymers and the plurality of ionic conductors may be made of poly(ethylene oxide)-LiN(SOCF)(PEO-LiTFSI) polymers. The all-solid-state battery system includes battery cells each including a cathode current collector, a cathode disposed beneath and connected to the cathode current collector, the solid-state electrolyte composite disposed beneath and connected to the cathode, an anode disposed beneath and connected to the solid-state electrolyte composite, and an anode current collector disposed beneath and connected to the anode.

Framework supported solid-state electrolyte composites for all-solid-state batteries

A Pd&#x2014;Ru alloy catalyst for hydrogen production and its preparation methods are provided. The catalyst can include a plurality of particles comprising an alloy of at least palladium (Pd) and ruthenium (Ru). Moreover, the catalyst can further include a support material such as carbon support having external or internal surfaces on which the plurality of particles is dispersed. The alloy catalyst can have a molar ratio of Pd:Ru in a range of about 0.5:1 to about 9:1. For hydrogen evolution reaction (HER), the Pd&#x2014;Ru alloy catalyst exhibits increased catalytic activities comparing to some well-known catalysts.

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Hong Kong, China

Minhua Shao