Publications by authors named "Mengzi Geng"
Regulating ion transport is a prevailing strategy to suppress lithium dendrite growth, in which the distribution of ion regulatory sites plays an important role. Here a hyperbranched polyamidoamine (HBPA) grafted polyethylene (PE) composite separator (HBPA--PE) is reported. The densely and uniformly distributed positive -NH and negative -CHNO- groups efficiently restrict the anion migration and promote Li transport at the surface of the lithium metal anode.
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- - The study addresses the shuttle effect of lithium polysulfides in lithium-sulfur batteries (LSBs), which negatively affects their performance, by introducing a coral-like CuS modification to carbon nanotubes (CNTs) used as a cathode interlayer.
- - The CuS/CNTs interlayer effectively blocks polysulfide anions through physical barriers and chemisorption, creating a "polysulfide-phobic" surface that keeps the anions in the cathode region and enhances lithium ion diffusion.
- - As a result, LSBs with this CuS/CNTs interlayer achieve a high initial discharge capacity of 1242.4 mAh/g at 0.5 C and maintain a