China Academy of Engineering Physics

About: China Academy of Engineering Physics is a facility organization based out in Mianyang, China. It is known for research contribution in the topics: Laser & Microstructure. The organization has 14158 authors who have published 12055 publications receiving 115810 citations. The organization is also known as: Ninth Institute of Second Ministry of Mechanical Industry & Ninth Institute of Ministry of Nuclear Industry.

Freestanding CNT-modified graphitic carbon foam as a flexible anode for potassium ion batteries

Abstract: Potassium-ion batteries (KIBs) have attracted more and more attention because of the abundant resources and low cost of potassium. The development of KIBs has been hindered due to the lack of electrode materials with high reversible capacity and long cycle life. Graphitic carbon as an anode for KIBs shows poor cyclability because the insertion of K-ions leads to huge volume expansion and structural collapse. Herein, we design carbon nanotube (CNT) modified graphitic carbon foam (CNTs/GCF) with 3D porous interconnected nanoarchitecture to boost the cyclability and rate performance of KIBs. The CNTs/GCF exhibits excellent electrochemical performance in terms of reversible capacity (226 mA h g−1 after 800 cycles with a capacity retention of 98% at 0.1 A g−1), cycle life (127 mA h g−1 after 2000 cycles with a capacity retention of 96% at 0.5 A g−1) and rate capability (254, 233, 204, 113, 85 and 74 mA h g−1 at 0.05, 0.1, 0.2, 0.5, 0.8 and 1 A g−1). The highly conductive CNTs shorten ion diffusion paths and the 3D GCF network facilitates electron transport and promotes the rapid migration of electrolyte ions. In situ Raman spectra prove that the CNTs/GCF shows the hybrid potassium storage mechanism of surface adsorption and intercalation.

A review on strategies addressing interface incompatibilities in inorganic all-solid-state lithium batteries

Abstract: High flammability, susceptibility to unstable interfacial reactions and lithium dendrite growth make currently employed liquid electrolyte systems in lithium batteries prone to severe safety concerns. Replacing the liquid electrolytes by solid-state versions is believed to be the ultimate solution to address the safety issues. Many research efforts have been dedicated to find solid-state electrolytes with excellent ionic conductivity comparable to that of the liquid counterparts and tremendous success has been achieved, especially with ceramic sulfide-based and oxide-based solid-state electrolytes. However, another major constraint inhibiting the practical development of such solid-state batteries is the solid–solid interfaces. This review summarizes the notable approaches that have been implemented to address the interface incompatibilities of ceramic solid-state electrolytes with battery electrodes. The focus will be on interfaces of sulfide and oxide solid electrolytes with both cathodes and metallic lithium anodes.