Publications by authors named "Junfu Bu"

Article Synopsis
  • - The all-solid-state battery (ASSB) featuring a lithium (Li) metal anode offers significantly higher energy density and improved safety compared to traditional Li-ion batteries, but it relies on efficient lithium movement through a solid electrolyte and composite cathode.
  • - Current lab techniques lack the ability to visualize lithium distributions at both the particle and electrode levels, limiting the understanding of lithium dynamics in ASSBs.
  • - The study introduces a novel method that combines plasma-focused ion beam milling, energy dispersive X-ray spectroscopy, and secondary ion mass spectrometry to create high-resolution 3D maps of electrode elements, enabling better insights into the microstructure's influence on ASSB performance.
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All-solid-state batteries with a Li anode and ceramic electrolyte have the potential to deliver a step change in performance compared with today's Li-ion batteries. However, Li dendrites (filaments) form on charging at practical rates and penetrate the ceramic electrolyte, leading to short circuit and cell failure. Previous models of dendrite penetration have generally focused on a single process for dendrite initiation and propagation, with Li driving the crack at its tip.

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The ever-growing market of electric vehicles and the upcoming grid-scale storage systems have stimulated the fast growth of renewable energy storage technologies. Aluminum-based batteries are considered one of the most promising alternatives to complement or possibly replace the current lithium-ion batteries owing to their high specific capacity, good safety, low cost, light weight, and abundant reserves of Al. However, the anode problems in primary and secondary Al batteries, such as, self-corrosion, passive film, and volume expansion, severely limit the batteries' practical performance, thus hindering their commercialization.

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Single-crystal PbS nanorods were successfully synthesized through a simple hydrothermal route using PEO-PPO-PEO triblock copolymer (P123) as a structure-directing agent. The XRD pattern indicates that the crystal structure of the nanorods is face-centre-cubic rocksalt. A SEM image shows that the nanorods have a diameter of 40-70 nm and a length of 200-600 nm, and both tips exhibit taper-like structures.

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